{"id":120212,"date":"2024-10-16T20:24:22","date_gmt":"2024-10-17T03:24:22","guid":{"rendered":"https:\/\/blogv2prod.wpenginepowered.com\/blog\/?p=120212"},"modified":"2025-01-20T21:17:58","modified_gmt":"2025-01-21T05:17:58","slug":"why-is-the-bmw-gas-only-showing-half-tank-causes-and-fixes","status":"publish","type":"post","link":"https:\/\/www.carparts.com\/blog\/why-is-the-bmw-gas-only-showing-half-tank-causes-and-fixes\/","title":{"rendered":"Why Is the BMW Gas Only Showing Half Tank? Causes and Fixes"},"content":{"rendered":"<!DOCTYPE html PUBLIC \"-\/\/W3C\/\/DTD HTML 4.0 Transitional\/\/EN\" \"http:\/\/www.w3.org\/TR\/REC-html40\/loose.dtd\">\n<html><body><span class=\"span-reading-time rt-reading-time\" style=\"display: block;\"><span class=\"rt-label rt-prefix\">Reading Time: <\/span> <span class=\"rt-time\"> 6<\/span> <span class=\"rt-label rt-postfix\">minutes<\/span><\/span><style>.kadence-column120212_dfab54-81 > .kt-inside-inner-col,.kadence-column120212_dfab54-81 > .kt-inside-inner-col:before{border-top-left-radius:0px;border-top-right-radius:0px;border-bottom-right-radius:0px;border-bottom-left-radius:0px;}.kadence-column120212_dfab54-81 > .kt-inside-inner-col{column-gap:var(--global-kb-gap-sm, 1rem);}.kadence-column120212_dfab54-81 > .kt-inside-inner-col{flex-direction:column;}.kadence-column120212_dfab54-81 > .kt-inside-inner-col > .aligncenter{width:100%;}.kadence-column120212_dfab54-81 > .kt-inside-inner-col:before{opacity:0.3;}.kadence-column120212_dfab54-81{position:relative;}@media all and (max-width: 1024px){.kadence-column120212_dfab54-81 > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}@media all and (max-width: 767px){.kadence-column120212_dfab54-81 > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}<\/style>\n<div class=\"wp-block-kadence-column kadence-column120212_dfab54-81 inner-column-1 qk-look-widget\"><div class=\"kt-inside-inner-col\">\n<div class=\"wp-block-ultimate-post-row ultp-block-b71682  qk-main-wrap\"><div class=\"ultp-row-wrapper\"><div class=\"ultp-row-content\">\n<div class=\"wp-block-ultimate-post-column ultp-block-9957a6\"><div class=\"ultp-column-wrapper\"><style>.wp-block-kadence-advancedheading.kt-adv-heading120212_2bfea5-c4, .wp-block-kadence-advancedheading.kt-adv-heading120212_2bfea5-c4[data-kb-block=\"kb-adv-heading120212_2bfea5-c4\"]{text-align:center;font-size:20px;font-style:normal;}.wp-block-kadence-advancedheading.kt-adv-heading120212_2bfea5-c4 mark.kt-highlight, .wp-block-kadence-advancedheading.kt-adv-heading120212_2bfea5-c4[data-kb-block=\"kb-adv-heading120212_2bfea5-c4\"] mark.kt-highlight{font-family:Inter;font-weight:500;font-style:normal;color:#f76a0c;-webkit-box-decoration-break:clone;box-decoration-break:clone;padding-top:0px;padding-right:0px;padding-bottom:0px;padding-left:0px;}.wp-block-kadence-advancedheading.kt-adv-heading120212_2bfea5-c4 img.kb-inline-image, .wp-block-kadence-advancedheading.kt-adv-heading120212_2bfea5-c4[data-kb-block=\"kb-adv-heading120212_2bfea5-c4\"] img.kb-inline-image{width:150px;vertical-align:baseline;}<\/style>\n<div class=\"kt-adv-heading120212_2bfea5-c4 summary-title wp-block-kadence-advancedheading\" data-kb-block=\"kb-adv-heading120212_2bfea5-c4\"><span>Summary<\/span><\/div>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Common causes for your BMW showing only half a tank of fuel include bad fuel gauges, inoperative sending units, and problems with circuitry.<\/li>\n\n\n\n<li>How to fix this issue depends on its cause. Some ways to resolve it are to fix bad wiring, hire a professional for maintenance, inspect the sending unit, and reset the fuel gauge.<\/li>\n\n\n\n<li>Bad fuel gauges are typically responsible for incorrect readings, so it&rsquo;s important to know how to test them so you can make repairs or replacements.<\/li>\n<\/ul>\n<\/div><\/div>\n<\/div><\/div><\/div>\n<\/div><\/div>\n\n\n\n\n\n<p>Driving your BMW is a joy, but not if you can&rsquo;t trust its fuel gauge readings. The inaccurate data can lead to trouble while you&rsquo;re on the road.<\/p>\n\n\n\n<p>For example, they might show you that your fuel tank is already half empty when you know for a fact you topped it off not too long ago. In some cases, you might get readings that indicate you have more fuel than you do, potentially landing you in trouble if the tank empties while you&rsquo;re far from gas stations.<\/p>\n\n\n\n<p>Because it can be dangerous to drive with incorrect readings, it&rsquo;s important to know what causes such a problem and what steps you can take to fix it.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">BMW Fuel Gauge Stuck on Half Tank: Common Causes<\/h2>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"773\" src=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2024\/10\/schematic-discussing-reason-why-bmw-fuel-gauge-stuck-on-half-tank-1024x773.jpg\" alt=\"schematic discussing reason why bmw fuel gauge stuck on half tank\" class=\"wp-image-123188\" srcset=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2024\/10\/schematic-discussing-reason-why-bmw-fuel-gauge-stuck-on-half-tank-1024x773.jpg 1024w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2024\/10\/schematic-discussing-reason-why-bmw-fuel-gauge-stuck-on-half-tank-300x226.jpg 300w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2024\/10\/schematic-discussing-reason-why-bmw-fuel-gauge-stuck-on-half-tank-768x580.jpg 768w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2024\/10\/schematic-discussing-reason-why-bmw-fuel-gauge-stuck-on-half-tank-150x113.jpg 150w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2024\/10\/schematic-discussing-reason-why-bmw-fuel-gauge-stuck-on-half-tank.jpg 1408w\" sizes=\"(max-width: 1024px) 100vw, 1024px\"><figcaption class=\"wp-element-caption\">If your BMW fuel gauge is stuck on half a tank, there&rsquo;s a good chance there&rsquo;s something wrong with the fuses, the sending unit, the circuitry, or the fuel gauge itself (see schematic). Inspect each of these components individually to determine whether or not they&rsquo;re working properly. | Image Source: Richard McCuistian<\/figcaption><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\">Inoperative Sending Unit<\/h3>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"848\" height=\"1024\" src=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2024\/10\/2004-bmw-325i-fuel-sending-unit-848x1024.jpg\" alt=\"2004 bmw 325i fuel sending unit\" class=\"wp-image-123189\" srcset=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2024\/10\/2004-bmw-325i-fuel-sending-unit-848x1024.jpg 848w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2024\/10\/2004-bmw-325i-fuel-sending-unit-248x300.jpg 248w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2024\/10\/2004-bmw-325i-fuel-sending-unit-768x928.jpg 768w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2024\/10\/2004-bmw-325i-fuel-sending-unit-150x181.jpg 150w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2024\/10\/2004-bmw-325i-fuel-sending-unit.jpg 1164w\" sizes=\"(max-width: 848px) 100vw, 848px\"><figcaption class=\"wp-element-caption\">A good rule of thumb when troubleshooting any system is to consider the part that is in the most hostile environment and is doing the most work. This is especially true with the fuel tank sending unit. The BMW unit shown is for a 2004 BMW 325i. | Image Source: Richard McCuistian<\/figcaption><\/figure>\n\n\n<style>.kadence-column120212_77fa9e-30 > .kt-inside-inner-col,.kadence-column120212_77fa9e-30 > .kt-inside-inner-col:before{border-top-left-radius:0px;border-top-right-radius:0px;border-bottom-right-radius:0px;border-bottom-left-radius:0px;}.kadence-column120212_77fa9e-30 > .kt-inside-inner-col{column-gap:var(--global-kb-gap-sm, 1rem);}.kadence-column120212_77fa9e-30 > .kt-inside-inner-col{flex-direction:column;}.kadence-column120212_77fa9e-30 > .kt-inside-inner-col > .aligncenter{width:100%;}.kadence-column120212_77fa9e-30 > .kt-inside-inner-col:before{opacity:0.3;}.kadence-column120212_77fa9e-30{position:relative;}@media all and (max-width: 1024px){.kadence-column120212_77fa9e-30 > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}@media all and (max-width: 767px){.kadence-column120212_77fa9e-30 > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}<\/style>\n<div class=\"wp-block-kadence-column kadence-column120212_77fa9e-30 kb-section-dir-vertical kb-section-sm-dir-vertical inner-column-1 pro-tip-widget\"><div class=\"kt-inside-inner-col\"><style>.kb-row-layout-id120212_bcc6fd-68 > .kt-row-column-wrap{align-content:start;}:where(.kb-row-layout-id120212_bcc6fd-68 > .kt-row-column-wrap) > .wp-block-kadence-column{justify-content:start;}.kb-row-layout-id120212_bcc6fd-68 > .kt-row-column-wrap{column-gap:var(--global-kb-gap-none, 0rem );row-gap:var(--global-kb-gap-md, 2rem);padding-top:20px;padding-right:32px;padding-bottom:20px;padding-left:16px;grid-template-columns:minmax(0, calc(10% - ((var(--global-kb-gap-none, 0rem ) * 1 )\/2)))minmax(0, calc(90% - ((var(--global-kb-gap-none, 0rem ) * 1 )\/2)));}.kb-row-layout-id120212_bcc6fd-68 > .kt-row-layout-overlay{opacity:0.00;}.kb-row-layout-id120212_bcc6fd-68 .kt-row-layout-bottom-sep{height:100px;}.kb-row-layout-id120212_bcc6fd-68 .kt-row-layout-bottom-sep svg{width:100%;}.kb-row-layout-id120212_bcc6fd-68 .kt-row-layout-bottom-sep svg{fill:#ffffff!important;}.kb-row-layout-id120212_bcc6fd-68 .kt-row-layout-top-sep{height:100px;}.kb-row-layout-id120212_bcc6fd-68 .kt-row-layout-top-sep svg{width:100%;}.kb-row-layout-id120212_bcc6fd-68 .kt-row-layout-top-sep svg{fill:#ffffff!important;}@media all and (max-width: 1024px){.kb-row-layout-id120212_bcc6fd-68 > .kt-row-column-wrap{grid-template-columns:minmax(0, 1fr) minmax(0, 2fr);}}@media all and (max-width: 1024px){.kb-row-layout-id120212_bcc6fd-68 .kt-row-layout-bottom-sep{height:px;}}@media all and (max-width: 1024px){.kb-row-layout-id120212_bcc6fd-68 .kt-row-layout-bottom-sep svg{width:%;}}@media all and (max-width: 767px){.kb-row-layout-id120212_bcc6fd-68 > .kt-row-column-wrap{padding-top:28px;padding-right:16px;padding-bottom:25px;padding-left:16px;grid-template-columns:minmax(0, 1fr) minmax(0, 2fr);}.kb-row-layout-id120212_bcc6fd-68 .kt-row-layout-bottom-sep{height:px;}.kb-row-layout-id120212_bcc6fd-68 .kt-row-layout-bottom-sep svg{width:%;}}<\/style><div class=\"kb-row-layout-wrap kb-row-layout-id120212_bcc6fd-68 alignnone pro-tip-wrap wp-block-kadence-rowlayout\"><div class=\"kt-row-column-wrap kt-has-2-columns kt-row-layout-right-golden kt-tab-layout-right-golden kt-mobile-layout-right-golden kt-row-valign-top\">\n<style>.kadence-column120212_2cd4d7-dc > .kt-inside-inner-col{display:flex;}.kadence-column120212_2cd4d7-dc > .kt-inside-inner-col{min-height:45px;}.kadence-column120212_2cd4d7-dc > .kt-inside-inner-col,.kadence-column120212_2cd4d7-dc > .kt-inside-inner-col:before{border-top-left-radius:0px;border-top-right-radius:0px;border-bottom-right-radius:0px;border-bottom-left-radius:0px;}.kadence-column120212_2cd4d7-dc > .kt-inside-inner-col{row-gap:0px;column-gap:0px;}.kadence-column120212_2cd4d7-dc > .kt-inside-inner-col{flex-direction:row;flex-wrap:wrap;align-items:center;}.kadence-column120212_2cd4d7-dc > .kt-inside-inner-col > *, .kadence-column120212_2cd4d7-dc > .kt-inside-inner-col > figure.wp-block-image, .kadence-column120212_2cd4d7-dc > .kt-inside-inner-col > figure.wp-block-kadence-image{margin-top:0px;margin-bottom:0px;}.kadence-column120212_2cd4d7-dc > .kt-inside-inner-col > .kb-image-is-ratio-size{flex-grow:1;}.kadence-column120212_2cd4d7-dc > .kt-inside-inner-col:before{opacity:0.3;}.kadence-column120212_2cd4d7-dc{position:relative;}@media all and (max-width: 1024px){.kadence-column120212_2cd4d7-dc > .kt-inside-inner-col{flex-direction:row;flex-wrap:wrap;align-items:center;}}@media all and (min-width: 768px) and (max-width: 1024px){.kadence-column120212_2cd4d7-dc > .kt-inside-inner-col > *, .kadence-column120212_2cd4d7-dc > .kt-inside-inner-col > figure.wp-block-image, .kadence-column120212_2cd4d7-dc > .kt-inside-inner-col > figure.wp-block-kadence-image{margin-top:0px;margin-bottom:0px;}.kadence-column120212_2cd4d7-dc > .kt-inside-inner-col > .kb-image-is-ratio-size{flex-grow:1;}}@media all and (max-width: 767px){.kadence-column120212_2cd4d7-dc > .kt-inside-inner-col{flex-direction:row;flex-wrap:wrap;justify-content:flex-start;}.kadence-column120212_2cd4d7-dc > .kt-inside-inner-col > *, .kadence-column120212_2cd4d7-dc > .kt-inside-inner-col > figure.wp-block-image, .kadence-column120212_2cd4d7-dc > .kt-inside-inner-col > figure.wp-block-kadence-image{margin-top:0px;margin-bottom:0px;}.kadence-column120212_2cd4d7-dc > .kt-inside-inner-col > .kb-image-is-ratio-size{flex-grow:1;}}<\/style>\n<div class=\"wp-block-kadence-column kadence-column120212_2cd4d7-dc kb-section-dir-horizontal kb-section-md-dir-horizontal inner-column-1 pro-tip-item1\"><div class=\"kt-inside-inner-col\"><style>.kb-image120212_60e076-94.kb-image-is-ratio-size, .kb-image120212_60e076-94 .kb-image-is-ratio-size{max-width:45px;width:100%;}.wp-block-kadence-column > .kt-inside-inner-col > .kb-image120212_60e076-94.kb-image-is-ratio-size, .wp-block-kadence-column > .kt-inside-inner-col > .kb-image120212_60e076-94 .kb-image-is-ratio-size{align-self:unset;}.kb-image120212_60e076-94 figure{max-width:45px;}.kb-image120212_60e076-94 .image-is-svg, .kb-image120212_60e076-94 .image-is-svg img{width:100%;}.kb-image120212_60e076-94 .kb-image-has-overlay:after{opacity:0.3;}<\/style>\n<div class=\"wp-block-kadence-image kb-image120212_60e076-94\"><figure class=\"aligncenter size-large\"><img decoding=\"async\" src=\"https:\/\/cld.partsimg.com\/image\/upload\/f_auto,dpr_auto,q_auto,c_pad\/carparts\/blog\/widgets\/protip\/services-icon\" alt=\"\" class=\"kb-img\"><\/figure><\/div>\n<\/div><\/div>\n\n\n<style>.kadence-column120212_69c252-8d > .kt-inside-inner-col,.kadence-column120212_69c252-8d > .kt-inside-inner-col:before{border-top-left-radius:0px;border-top-right-radius:0px;border-bottom-right-radius:0px;border-bottom-left-radius:0px;}.kadence-column120212_69c252-8d > .kt-inside-inner-col{column-gap:var(--global-kb-gap-sm, 1rem);}.kadence-column120212_69c252-8d > .kt-inside-inner-col{flex-direction:column;}.kadence-column120212_69c252-8d > .kt-inside-inner-col > .aligncenter{width:100%;}.kadence-column120212_69c252-8d > .kt-inside-inner-col:before{opacity:0.3;}.kadence-column120212_69c252-8d{position:relative;}@media all and (max-width: 1024px){.kadence-column120212_69c252-8d > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}@media all and (max-width: 767px){.kadence-column120212_69c252-8d > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}<\/style>\n<div class=\"wp-block-kadence-column kadence-column120212_69c252-8d inner-column-2 pro-tip-item2\"><div class=\"kt-inside-inner-col\">\n<div class=\"protip-desc\">\n\t<div class=\"help-tip\">\n\t\t<p><strong>Pro Tips<\/strong> are nuggets of information direct from ASE-certified automobile technicians working with CarParts.com, which may include unique, personal insights based on their years of experience working in the automotive industry. These can help you make more informed decisions about your car.<\/p>\n\t<\/div>\n    <div class=\"help-caption\">\n        <p>\n            <strong>Pro Tip:<\/strong>\nOn BMW fuel tank senders, sometimes non-conducting deposits will form on the conductor surface of the fuel level sensor, which calls for sensor\/pump replacement.\n        <\/p>\n    <\/div>\n<\/div>\n<\/div><\/div>\n\n<\/div><\/div><\/div><\/div>\n\n\n\n<div class=\"wp-block-data443-irp-shortcode irp-shortcode\"><div style=\"clear:both; margin-top:0em; margin-bottom:1em;\"><a href=\"https:\/\/www.carparts.com\/blog\/does-your-rpm-jump-while-driving-here-are-10-reasons-why\/\" target=\"_self\" rel=\"dofollow\" class=\"u4bc194e23b88532e6538b67c0ab07f9b\"><style> .u4bc194e23b88532e6538b67c0ab07f9b { padding:0px; margin: 0; padding-top:1em!important; padding-bottom:1em!important; width:100%; display: block; font-weight:bold; background-color:#eaeaea; border:0!important; border-left:4px solid #34495E!important; text-decoration:none; } .u4bc194e23b88532e6538b67c0ab07f9b:active, .u4bc194e23b88532e6538b67c0ab07f9b:hover { opacity: 1; transition: opacity 250ms; webkit-transition: opacity 250ms; text-decoration:none; } .u4bc194e23b88532e6538b67c0ab07f9b { transition: background-color 250ms; webkit-transition: background-color 250ms; opacity: 1; transition: opacity 250ms; webkit-transition: opacity 250ms; } .u4bc194e23b88532e6538b67c0ab07f9b .ctaText { font-weight:bold; color:#464646; text-decoration:none; font-size: 16px; } .u4bc194e23b88532e6538b67c0ab07f9b .postTitle { color:#000000; text-decoration: underline!important; font-size: 16px; } .u4bc194e23b88532e6538b67c0ab07f9b:hover .postTitle { text-decoration: underline!important; } <\/style><div style=\"padding-left:1em; padding-right:1em;\"><span class=\"ctaText\">See also<\/span>&nbsp; <span class=\"postTitle\">Does Your RPM Jump While Driving? Here Are 10 Reasons Why<\/span><\/div><\/a><\/div><\/div>\n\n\n\n<p>The sending unit should have about 2 ohms when full and 85 ohms when empty. If you insert a 2 ohm resistor in the harness connector on the right pins, you should see the gauge go to full when you cycle the ignition key.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Bad Fuel Gauge<\/h3>\n\n\n\n<p>If the fuel gauge is stuck on half a tank, there might be something wrong with the <a href=\"https:\/\/www.carparts.com\/fuel-gauge\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"fuel gauge\">fuel gauge<\/a> itself or possibly the instrument cluster computer that receives the signals from the sender and drives the gauge. If you disconnect the sending unit on a BMW, the gauge typically goes to empty.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Problems With Circuitry<\/h3>\n\n\n\n<p>Another common cause for inaccurate fuel gauge readings is bad circuitry in your BMW&rsquo;s electrical system. The voltage might be too low for the gauge to get proper readings, which typically occurs when there&rsquo;s an interrupted ground connection. Corrosion can also cause problems with the circuitry.<\/p>\n\n\n\n<p>Check the fuse box to see if there&rsquo;s anything wrong with the fuse connected to the fuel gauge. If you&rsquo;re unsure of which one that is, consult your owner&rsquo;s manual. If the fuse is blown, this might be what&rsquo;s responsible for incorrect fuel gauge readings.<\/p>\n\n\n\n<p><strong><em>Note<\/em><\/strong><em>: A faulty fuse is not likely the cause if the gauge is the only issue<\/em><\/p>\n\n\n\n<h2 class=\"wp-block-heading\">How to Fix Your BMW&rsquo;s Inaccurate Fuel Gauge Readings<\/h2>\n\n\n\n<p>How to fix this issue obviously depends on its cause as well as the model and year of the vehicle, so there isn&rsquo;t a silver bullet, as nice as that would be.<\/p>\n\n\n\n<div class=\"wp-block-data443-irp-shortcode irp-shortcode\"><div style=\"clear:both; margin-top:0em; margin-bottom:1em;\"><a href=\"https:\/\/www.carparts.com\/blog\/7-reasons-why-your-car-stalls-after-getting-gas\/\" target=\"_self\" rel=\"dofollow\" class=\"u2c7be7b9e7ca201ae87f81a514890c11\"><style> .u2c7be7b9e7ca201ae87f81a514890c11 { padding:0px; margin: 0; padding-top:1em!important; padding-bottom:1em!important; width:100%; display: block; font-weight:bold; background-color:#eaeaea; border:0!important; border-left:4px solid #34495E!important; text-decoration:none; } .u2c7be7b9e7ca201ae87f81a514890c11:active, .u2c7be7b9e7ca201ae87f81a514890c11:hover { opacity: 1; transition: opacity 250ms; webkit-transition: opacity 250ms; text-decoration:none; } .u2c7be7b9e7ca201ae87f81a514890c11 { transition: background-color 250ms; webkit-transition: background-color 250ms; opacity: 1; transition: opacity 250ms; webkit-transition: opacity 250ms; } .u2c7be7b9e7ca201ae87f81a514890c11 .ctaText { font-weight:bold; color:#464646; text-decoration:none; font-size: 16px; } .u2c7be7b9e7ca201ae87f81a514890c11 .postTitle { color:#000000; text-decoration: underline!important; font-size: 16px; } .u2c7be7b9e7ca201ae87f81a514890c11:hover .postTitle { text-decoration: underline!important; } <\/style><div style=\"padding-left:1em; padding-right:1em;\"><span class=\"ctaText\">See also<\/span>&nbsp; <span class=\"postTitle\">7 Reasons Why Your Car Stalls After Getting Gas<\/span><\/div><\/a><\/div><\/div>\n\n\n\n<p>Common ways to fix incorrect fuel gauge readings from your BMW include fixing bad wiring, hiring a professional to do maintenance on your car, and inspecting the sending unit for signs of damage. Resetting or recalibrating the fuel gauge is also a possible fix.<\/p>\n\n\n\n<p>More often than not, faulty fuel gauges are to blame for inaccurate readings but it&rsquo;s worth checking on the wiring and other components for problems as well. Here&rsquo;s a look at the common fixes.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Fix Bad Wiring<\/h3>\n\n\n\n<p>Clean any corrosion in the wiring and the circuitry, and keep a sharp eye out for blown fuses. Replace any damaged wires.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Hire a Professional for Maintenance<\/h3>\n\n\n\n<p>Regular maintenance is the key to prolonging your vehicle&rsquo;s lifespan. Professionals can help you identify what&rsquo;s wrong with your vehicle and make recommendations on how to fix it. It&rsquo;s important to bring your vehicle to a mechanic for maintenance at least twice a year.<\/p>\n\n\n\n\n\n\n<h3 class=\"wp-block-heading\">Inspect the Sending Unit<\/h3>\n\n\n\n<p>If the sending unit is inoperative, it&rsquo;s important to get it repaired or replaced as soon as possible. You might need to test the sending unit yourself to see if it&rsquo;s working properly.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Reset or Recalibrate the Fuel Gauge<\/h3>\n\n\n\n<p>If the fuel gauge isn&rsquo;t calibrated properly, you can get inaccurate readings. Resetting the fuel gauge might make it display proper readings again.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">How to Test a Fuel Gauge<\/h2>\n\n\n\n<p>If you want to test your BMW&rsquo;s fuel gauge, you&rsquo;ll need the following equipment.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><a href=\"https:\/\/www.carparts.com\/gloves\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"Safety gloves\">Safety gloves<\/a> and <a href=\"https:\/\/www.carparts.com\/safety-glasses\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"glasses\">glasses<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/www.carparts.com\/multimeter\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"Multimeter\">Multimeter<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/www.carparts.com\/screwdriver\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"Screwdriver set\">Screwdriver set<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/www.carparts.com\/socket\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"Socket set\">Socket set<\/a><\/li>\n\n\n\n<li>Trim removal tools<\/li>\n<\/ul>\n\n\n\n<p>To test your BMW&rsquo;s fuel gauge, follow these steps carefully.<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>Wear your safety gloves and glasses.<\/li>\n<\/ol>\n\n\n\n<ol start=\"2\" class=\"wp-block-list\">\n<li>Inspect the fuses of your fuel gauge to see if any of them have blown. If you notice any blown fuses, replace them and try running the gauge again. If the problem hasn&rsquo;t been fixed, there might be something wrong with the electrical system.<\/li>\n<\/ol>\n\n\n\n<ol start=\"3\" class=\"wp-block-list\">\n<li>If the fuses work, check the wiring of the fuel gauge. If there are corroded and damaged wires, replace the wires and try running the gauge again. If these don&rsquo;t fix the problem, there might be something wrong with the sending unit.<\/li>\n<\/ol>\n\n\n\n<ol start=\"4\" class=\"wp-block-list\">\n<li>If the fuses and the wiring are both fine, check the sending unit. The float might be broken or there could be something wrong with the terminals. You can determine whether or not a sending unit is inoperative by using a multimeter.<br><br>Place one probe on the sending terminal and another probe on the ground. Move the float once the multimeter is on. If the resistance doesn&rsquo;t change, the sending unit needs to be replaced.<\/li>\n<\/ol>\n\n\n\n<div class=\"wp-block-data443-irp-shortcode irp-shortcode\"><div style=\"clear:both; margin-top:0em; margin-bottom:1em;\"><a href=\"https:\/\/www.carparts.com\/blog\/p0462-fuel-level-sensor-a-circuit-low\/\" target=\"_self\" rel=\"dofollow\" class=\"u1d73671c0b55db417214ab684f0ba62b\"><style> .u1d73671c0b55db417214ab684f0ba62b { padding:0px; margin: 0; padding-top:1em!important; padding-bottom:1em!important; width:100%; display: block; font-weight:bold; background-color:#eaeaea; border:0!important; border-left:4px solid #34495E!important; text-decoration:none; } .u1d73671c0b55db417214ab684f0ba62b:active, .u1d73671c0b55db417214ab684f0ba62b:hover { opacity: 1; transition: opacity 250ms; webkit-transition: opacity 250ms; text-decoration:none; } .u1d73671c0b55db417214ab684f0ba62b { transition: background-color 250ms; webkit-transition: background-color 250ms; opacity: 1; transition: opacity 250ms; webkit-transition: opacity 250ms; } .u1d73671c0b55db417214ab684f0ba62b .ctaText { font-weight:bold; color:#464646; text-decoration:none; font-size: 16px; } .u1d73671c0b55db417214ab684f0ba62b .postTitle { color:#000000; text-decoration: underline!important; font-size: 16px; } .u1d73671c0b55db417214ab684f0ba62b:hover .postTitle { text-decoration: underline!important; } <\/style><div style=\"padding-left:1em; padding-right:1em;\"><span class=\"ctaText\">See also<\/span>&nbsp; <span class=\"postTitle\">P0462: Fuel Level Sensor &ldquo;A&rdquo; Circuit Low<\/span><\/div><\/a><\/div><\/div>\n\n\n\n<h2 class=\"wp-block-heading\">How Much Does it Cost to Repair a Fuel Gauge?<\/h2>\n\n\n\n<p>The cost of repairing a fuel gauge depends on which components have been damaged. The price can range from $10 to $800.<\/p>\n\n\n\n<p>Blown fuses are cheap and easy to repair, whereas fixing an inoperative gauge can cost up to $400 including labor costs if you hire a mechanic. The sending unit is the most expensive component of the fuel gauge to replace, costing up to $800.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Where to Get Replacement Parts for Your BMW<\/h2>\n\n\n\n<p>If your BMW&rsquo;s fuel gauge or sending units are inoperative or starting to malfunction, it might be time to replace them. Unfortunately, getting replacements from auto part shops can be difficult, especially if they&rsquo;re not available on hand.&nbsp;<\/p>\n\n\n\n<p>On the bright side, that won&rsquo;t be a problem if you shop online at <a href=\"http:\/\/carparts.com\" target=\"_blank\" rel=\"noreferrer noopener nofollow\" aria-label=\"CarParts.com\">CarParts.com<\/a>. Finding components designed to work with your car only takes a few minutes. The best part? You can get your hands on your order without going beyond your doorstep.<\/p>\n\n\n\n<p>Simply use your mobile device or computer to visit our website. Use our vehicle selector to narrow our extensive catalog to the auto parts designed to work with your BMW.<\/p>\n\n\n\n<p>We source our components from the most reliable names in the industry. Each item in our catalog is hand-picked by a team of professionals to guarantee both quality and longevity. You won&rsquo;t have to worry about any of your new parts failing you any time soon.<\/p>\n\n\n\n<p>On top of that, our warehouses are strategically located all over the US, meaning you can expect to receive your replacement parts within two business days. This, combined with the fact that every item in our catalog is sold at competitive prices, means you can save both time and money.<\/p>\n\n\n\n<p>Don&rsquo;t hold off on ordering replacement parts for your BMW. Whether you need a new <a href=\"https:\/\/www.carparts.com\/fuel-sending-unit\/bmw\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"fuel sending unit\">fuel sending unit<\/a> or <a href=\"https:\/\/www.carparts.com\/fuel-gauge\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"fuel gauge\">fuel gauge<\/a>, you&rsquo;re sure to find exactly what you need. Shop now!<\/p>\n<\/body><\/html>\n","protected":false},"excerpt":{"rendered":"<p><span class=\"span-reading-time rt-reading-time\" style=\"display: block;\"><span class=\"rt-label rt-prefix\">Reading Time: <\/span> <span class=\"rt-time\"> 6<\/span> <span class=\"rt-label rt-postfix\">minutes<\/span><\/span>Driving your BMW is a joy, but not if you can&rsquo;t trust its fuel gauge readings. The inaccurate data can&#8230; <a href=\"https:\/\/www.carparts.com\/blog\/why-is-the-bmw-gas-only-showing-half-tank-causes-and-fixes\/\" rel=\"nofollow\">Read More<\/a><\/p>\n","protected":false},"author":4,"featured_media":120213,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_genesis_hide_title":false,"_genesis_hide_breadcrumbs":false,"_genesis_hide_singular_image":false,"_genesis_hide_footer_widgets":false,"_genesis_custom_body_class":"","_genesis_custom_post_class":"","_genesis_layout":"","footnotes":""},"categories":[52,3758],"tags":[4315,1211],"ppma_author":[2607,2985],"class_list":{"0":"post-120212","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-diy","8":"category-electrical-system","9":"tag-bmw-fuel-gauge","10":"tag-fuel-gauge","11":"entry"},"acf":{"adrotate_specific_mobile_ad":"","adrotate_specific_desktop_ad":""},"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.6 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Why Is the BMW Gas Only Showing Half Tank? Causes and Fixes - In The Garage with CarParts.com<\/title>\n<meta name=\"description\" content=\"Learn about some of the potential reasons why your BMW\u2019s fuel gauge is stuck on half a tank and what you can do to fix that.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.carparts.com\/blog\/why-is-the-bmw-gas-only-showing-half-tank-causes-and-fixes\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Why Is the BMW Gas Only Showing Half Tank? Causes and Fixes - In The Garage with CarParts.com\" \/>\n<meta property=\"og:description\" content=\"Learn about some of the potential reasons why your BMW\u2019s fuel gauge is stuck on half a tank and what you can do to fix that.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.carparts.com\/blog\/why-is-the-bmw-gas-only-showing-half-tank-causes-and-fixes\/\" \/>\n<meta property=\"og:site_name\" content=\"In The Garage with CarParts.com\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/carpartscom\" \/>\n<meta property=\"article:published_time\" content=\"2024-10-17T03:24:22+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2025-01-21T05:17:58+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2024\/10\/bmw-gas-only-showing-half-tank.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"2048\" \/>\n\t<meta property=\"og:image:height\" content=\"1364\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:creator\" content=\"@carpartscom\" \/>\n<meta name=\"twitter:site\" content=\"@carpartscom\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"7 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/www.carparts.com\\\/blog\\\/why-is-the-bmw-gas-only-showing-half-tank-causes-and-fixes\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.carparts.com\\\/blog\\\/why-is-the-bmw-gas-only-showing-half-tank-causes-and-fixes\\\/\"},\"author\":[{\"@type\":\"Person\",\"$id\":\"4\",\"name\":\"CarParts.com Research Team\",\"jobTitle\":\"Expert Automotive Writer\",\"description\":\"The CarParts.com Research Team is composed of experienced automotive and tech writers working with (ASE)-certified automobile technicians and automotive journalists to bring up-to-date, helpful information to car owners in the US. 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