{"id":43091,"date":"2021-08-19T00:27:04","date_gmt":"2021-08-19T07:27:04","guid":{"rendered":"https:\/\/blogv2prod.wpenginepowered.com\/blog\/?p=43091"},"modified":"2025-11-05T01:09:59","modified_gmt":"2025-11-05T09:09:59","slug":"audi-a4-reliability-and-common-problems","status":"publish","type":"post","link":"https:\/\/www.carparts.com\/blog\/audi-a4-reliability-and-common-problems\/","title":{"rendered":"Audi A4 Reliability and Common Problems"},"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\"> 5<\/span> <span class=\"rt-label rt-postfix\">minutes<\/span><\/span><style>.kadence-column43091_18f523-b6 > .kt-inside-inner-col,.kadence-column43091_18f523-b6 > .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-column43091_18f523-b6 > .kt-inside-inner-col{column-gap:var(--global-kb-gap-sm, 1rem);}.kadence-column43091_18f523-b6 > .kt-inside-inner-col{flex-direction:column;}.kadence-column43091_18f523-b6 > .kt-inside-inner-col > .aligncenter{width:100%;}.kadence-column43091_18f523-b6 > .kt-inside-inner-col:before{opacity:0.3;}.kadence-column43091_18f523-b6{position:relative;}@media all and (max-width: 1024px){.kadence-column43091_18f523-b6 > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}@media all and (max-width: 767px){.kadence-column43091_18f523-b6 > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}<\/style>\n<div class=\"wp-block-kadence-column kadence-column43091_18f523-b6 inner-column-1 qk-look-widget\"><div class=\"kt-inside-inner-col\">\n<div class=\"wp-block-ultimate-post-row ultp-block-9736e5  qk-main-wrap\"><div class=\"ultp-row-wrapper\"><div class=\"ultp-row-content\">\n<div class=\"wp-block-ultimate-post-column ultp-block-2eb833\"><div class=\"ultp-column-wrapper\"><style>.wp-block-kadence-advancedheading.kt-adv-heading43091_3593c6-0e, .wp-block-kadence-advancedheading.kt-adv-heading43091_3593c6-0e[data-kb-block=\"kb-adv-heading43091_3593c6-0e\"]{text-align:center;font-size:20px;font-style:normal;}.wp-block-kadence-advancedheading.kt-adv-heading43091_3593c6-0e mark.kt-highlight, .wp-block-kadence-advancedheading.kt-adv-heading43091_3593c6-0e[data-kb-block=\"kb-adv-heading43091_3593c6-0e\"] 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-heading43091_3593c6-0e img.kb-inline-image, .wp-block-kadence-advancedheading.kt-adv-heading43091_3593c6-0e[data-kb-block=\"kb-adv-heading43091_3593c6-0e\"] img.kb-inline-image{width:150px;vertical-align:baseline;}<\/style>\n<div class=\"kt-adv-heading43091_3593c6-0e summary-title wp-block-kadence-advancedheading\" data-kb-block=\"kb-adv-heading43091_3593c6-0e\"><span>Summary<\/span><\/div>\n\n\n\n<ul class=\"wp-block-list\">\n<li>The Audi A4 gets an average RepairPal rating of 3.5 out of 5.0 but suffers from higher repair costs.<\/li>\n\n\n\n<li>The Audi A4 is known to develop issues like carbon buildup in the intake system, failed fuel pumps, excessive oil consumption, premature wear on suspension parts, and engine failure.<\/li>\n\n\n\n<li>It&rsquo;s best to avoid the 2002 Audi A4 model because of various engine issues. That said, you should still do your own research to know which parts are known to develop issues.<\/li>\n<\/ul>\n<\/div><\/div>\n<\/div><\/div><\/div>\n<\/div><\/div>\n\n\n\n\n\n<p>Whether you&rsquo;re planning to buy a new or used <a href=\"https:\/\/www.carparts.com\/audi\/a4\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"Audi A4\">Audi A4<\/a>, you&rsquo;re sure to get the best value for your money. The car boasts excellent handling, intuitive safety and technology features, and an impeccably constructed cabin. <a href=\"https:\/\/caredge.com\/audi\/a4\/depreciation\" target=\"_blank\" rel=\"noreferrer noopener nofollow\" aria-label=\"CarEdge.com\">CarEdge.com<\/a> reports that it has a 49% depreciation rate after five years, which is better than most of its competitors.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Are Audi A4s Reliable?<\/h2>\n\n\n\n<p><a href=\"https:\/\/repairpal.com\/reliability\/audi\/a4\" target=\"_blank\" rel=\"noreferrer noopener nofollow\" aria-label=\"RepairPal\">RepairPal<\/a> gives the A4 a 3.5 out of 5.0 reliability rating, ranking it 14th out of 31 luxury midsize cars. The typical annual maintenance and repair cost for this model is $739, which is the average for luxury sedans. It is, however, pricier than other models, as the average repairs and maintenance for other vehicles usually amount to $652.<\/p>\n\n\n\n<p>A4 owners seldom need to bring in their vehicles for unscheduled repairs. The drivers of this model bring in their sedans to a repair shop 0.4 times a year, which is less than the average 0.6 times annually for luxury midsize cars. The A4, however, has a 13% probability of needing a major fix compared to the usual 12% for all vehicle models.<\/p>\n\n\n\n<figure class=\"wp-block-embed aligncenter is-type-rich is-provider-twitter wp-block-embed-twitter\"><div class=\"wp-block-embed__wrapper\">\n<blockquote class=\"twitter-tweet\" data-width=\"500\" data-dnt=\"true\"><p lang=\"en\" dir=\"ltr\">Sharp lines, smooth cornering. <a href=\"https:\/\/twitter.com\/hashtag\/AudiA4?src=hash&amp;ref_src=twsrc%5Etfw\" target=\"_blank\" rel=\"noreferrer noopener nofollow\" aria-label=\"#AudiA4\">#AudiA4<\/a> <a href=\"https:\/\/t.co\/GdHdBpuFRA\" target=\"_blank\" rel=\"noreferrer noopener nofollow\" aria-label=\"pic.twitter.com\/GdHdBpuFRA\">pic.twitter.com\/GdHdBpuFRA<\/a><\/p>&mdash; Audi USA (@Audi) <a href=\"https:\/\/twitter.com\/Audi\/status\/766811240467468294?ref_src=twsrc%5Etfw\" target=\"_blank\" rel=\"noreferrer noopener nofollow\" aria-label=\"August 20, 2016\">August 20, 2016<\/a><\/blockquote><script async src=\"https:\/\/platform.twitter.com\/widgets.js\" charset=\"utf-8\"><\/script>\n<\/div><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">Top Audi A4 Problems<\/h2>\n\n\n\n<p>As reliable as it is, the Audi A4 is no exception to issues that can affect its performance. Below are some of the most common ones reported by drivers across different model years.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Decreased Power and Poor Fuel Economy<\/h3>\n\n\n\n<p>Carbon build-up in the intake system of some 2006-2017 A4s has been reported to cause power loss, an illuminated check engine light, rough idling, and decreased fuel economy.<\/p>\n\n\n\n<p>Because A4s are built with direct injection engines, gasoline doesn&rsquo;t flow through the usual areas where carbon builds up. This is why experts recommend removing the intake manifold to clean the intake system.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Clogged Plenum Tray Drain<\/h3>\n\n\n\n<p>Many owners of 1996-2010 and 2014 Audi A4s have complained about water leaking from the driver&rsquo;s and passenger&rsquo;s side due to a clogged plenum tray drain. The leak usually fried the wiring from various components, such as the airbag light and seat belt warning light.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"600\" src=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2021\/08\/2006-2008-Audi-A4-Wikimedia-1024x600.jpg\" alt=\"2006 2008 Audi A4 Wikimedia\" class=\"wp-image-43096\" style=\"width:1024px;height:600px\" srcset=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2021\/08\/2006-2008-Audi-A4-Wikimedia-1024x600.jpg 1024w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2021\/08\/2006-2008-Audi-A4-Wikimedia-300x176.jpg 300w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2021\/08\/2006-2008-Audi-A4-Wikimedia-768x450.jpg 768w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2021\/08\/2006-2008-Audi-A4-Wikimedia-1536x900.jpg 1536w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2021\/08\/2006-2008-Audi-A4-Wikimedia-150x88.jpg 150w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2021\/08\/2006-2008-Audi-A4-Wikimedia.jpg 1700w\" sizes=\"(max-width: 1024px) 100vw, 1024px\"><figcaption class=\"wp-element-caption\">Some owners of 1996-2010 and 2014 Audi A4s have complained about water leaking from the driver&rsquo;s and passenger&rsquo;s side due to a clogged plenum tray drain. Image source: <a href=\"https:\/\/commons.wikimedia.org\/wiki\/File:2006-2008_Audi_A4.jpg\" target=\"_blank\" rel=\"noreferrer noopener nofollow\" aria-label=\"Wikimedia\">Wikimedia<\/a>.<\/figcaption><\/figure>\n\n\n\n<p>Some drivers have also reported having a damaged electronic control module, malfunctioning interior lights, and defective power windows. To prevent these issues, it&rsquo;s important to keep the drain clean from leaves, pine needles, and other debris.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">High-Pressure Fuel Pump Failure<\/h3>\n\n\n\n<p>Hesitation upon acceleration due to a faulty high-pressure <a href=\"https:\/\/www.carparts.com\/fuel-pump\/audi\/a4\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"fuel pump\">fuel pump<\/a> has been a common issue found in some 2006-2010 and 2012 Audi A4s. The part usually fails due to contamination, overheating, and worn-out gears.<\/p>\n\n\n\n<p>If your A4&rsquo;s high-pressure fuel pump gets damaged, your vehicle may exhibit symptoms like sputtering, stalling, surging, and poor fuel economy. In some cases, your Audi may not even start at all. The cost of replacing a <a href=\"https:\/\/www.carparts.com\/blog\/common-fuel-pump-symptoms\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"bad fuel pump\">bad fuel pump<\/a> typically ranges from $200 to $600 plus labor costs.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Excessive Oil Consumption<\/h3>\n\n\n\n<p>One of the most common 2011 Audi A4 problems is excessive oil consumption. Many drivers of this model year noticed excessive vibration from their vehicles when braking due to little to no oil in the engine. Most drivers said that they&rsquo;ve topped up on engine oil multiple times, but their vehicles continued to burn oil at an alarming rate.<\/p>\n\n\n\n<div id=\"article-search-widget\">\n<div class=\"cp-search\">\n<div align=\"center\">\n<img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/cld.partsimg.com\/image\/upload\/w_auto,dpr_auto\/carparts\/logos\/badge_wordmark\/full_color\/CP_LOGO_COLOUR_RGB\" alt=\"CarParts.com\" width=\"300\" height=\"56\">\n<\/div>\n<form id=\"cpsearchform\" name=\"cpsearchform\" action=\"https:\/\/www.carparts.com\/search\" method=\"get\" target=\"_blank\" accept-charset=\"character_set\" aria-label=\"search CarParts.com\">\n    <input type=\"text\" class=\"keyword\" name=\"q\" placeholder=\"Search for parts on CarParts.com\" value=\"\" aria-label=\"Search CarParts.com\"><input type=\"submit\" class=\"btn-search\" value=\"Search\" aria-label=\"Search\">\n<\/form>\n<\/div>\n<\/div>\n\n\n\n<p>Other than the 2011 redesign, certain 1997-2010 A4s have also been reported to have engine oil problems. Many owners of these model years report seeing puddles of oil coming from the underside of their vehicles. Some also report that oil began to leak into the transmission bell housing, which forced them to replace parts like the <a href=\"https:\/\/www.carparts.com\/valve-cover-gasket\/audi\/a4\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"valve cover gasket\">valve cover gasket<\/a> and camshaft tensioner gasket.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Engine Misfire<\/h3>\n\n\n\n<p>There have been several cases of engine misfires in some 1997-2007, 2009, and 2011 Audi A4s. Some drivers complained that their engines died after idling. Others had to replace multiple <a href=\"https:\/\/www.carparts.com\/ignition-coil\/audi\/a4\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"ignition coils\">ignition coils<\/a> because the coils failed in quick succession. Damaged or worn-out <a href=\"https:\/\/www.carparts.com\/spark-plug\/audi\/a4\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"spark plugs\">spark plugs<\/a> and <a href=\"https:\/\/www.carparts.com\/spark-plug-wire\/audi\/a4\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"spark plug wires\">spark plug wires<\/a> have also been reported to cause engine misfires.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Suspension Parts Wear Prematurely<\/h3>\n\n\n\n<p>Some 1996-2010 A4 owners have reported hearing clunking noises from their vehicles and experiencing a rough ride. The affected drivers had to replace several suspension parts, such as the lower rear <a href=\"https:\/\/www.carparts.com\/control-arm\/audi\/a4\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"control arms\">control arms<\/a>, <a href=\"https:\/\/www.carparts.com\/control-arm-bushing\/audi\/a4\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"control arm bushings\">control arm bushings<\/a>, <a href=\"https:\/\/www.carparts.com\/shock-absorber-and-strut-assembly\/audi\/a4\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"struts\">struts<\/a>, and <a href=\"https:\/\/www.carparts.com\/driveshaft\/audi\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"driveshafts\">driveshafts<\/a> due to premature wear. If left unaddressed, worn-out suspension parts can cause uneven tire wear and steering alignment issues.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Flasher Relay and Control Module Failure<\/h3>\n\n\n\n<p>Drivers of many 1997-2006 A4s have complained about a faulty <a href=\"https:\/\/www.carparts.com\/turn-signal-switch\/audi\/a4\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"turn signal switch\">turn signal switch<\/a>. Most of them report having a left turn signal and fog light that won&rsquo;t turn off due to a faulty <a href=\"https:\/\/www.carparts.com\/blog\/turn-signal-relay-guide-location-signs-of-failure-replacement-info\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"turn signal flasher relay\">turn signal flasher relay<\/a>.<\/p>\n\n\n\n<figure class=\"wp-block-embed is-type-video is-provider-youtube wp-block-embed-youtube wp-embed-aspect-16-9 wp-has-aspect-ratio\"><div class=\"wp-block-embed__wrapper\">\n<iframe loading=\"lazy\" title=\"HOW TO FIX SOLID TURN SIGNALS B5 A4 (AUDI) (HAZARD LIGHT SWITCH)\" width=\"500\" height=\"281\" src=\"https:\/\/www.youtube.com\/embed\/t8ZVQL_kpJo?feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen><\/iframe>\n<\/div><\/figure>\n\n\n\n<div style=\"height:10px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<p>Other issues found on these model years include a faulty anti-lock braking system (ABS) control module, which triggered the check engine light. Some Audi owners also report replacing all four wheel sensors after their rear wheels locked up upon applying the brakes.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Engine Failure<\/h3>\n\n\n\n<p>Many owners of the 2002 A4 redesign have complained about engine failure. Most of them had to replace the <a href=\"https:\/\/www.carparts.com\/blog\/timing-belt\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"timing belt\">timing belt<\/a> before the recommended interval. Several drivers also report having an illuminated <a href=\"https:\/\/www.carparts.com\/blog\/low-oil-pressure-symptoms-and-faq\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"low oil pressure\">low oil pressure<\/a> warning lamp a day after their engines were flushed to replace the coolant.<\/p>\n\n\n\n<p>Keep in mind that engine failure can have more than one cause. Some of the most common ones include a low or discharged <a href=\"https:\/\/www.carparts.com\/battery\/audi\/a4\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"battery\">battery<\/a>, <a href=\"https:\/\/www.carparts.com\/ignition-switch\/audi\/a4\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"ignition switch\">ignition switch<\/a> failure, clogged <a href=\"https:\/\/www.carparts.com\/fuel-filter\/audi\/a4\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"fuel filters\">fuel filters<\/a>, emissions control faults, and <a href=\"https:\/\/www.carparts.com\/catalytic-converter\/audi\/a4\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"catalytic converter\">catalytic converter<\/a> failure. If you find yourself dealing with the same issue with your A4, make sure to consult a licensed mechanic for a proper diagnosis before replacing any part.<\/p>\n\n\n\n<p>Even a luxury sedan such as the Audi A4 is no stranger to having damaged or worn-out components that may affect its drivability. It&rsquo;s important to stay on top of its maintenance to keep your sedan running for a long time. It&rsquo;s also a good idea to familiarize yourself with the model&rsquo;s most common issues to know which parts may develop issues as your Audi racks up mileage.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Keep Your Audi A4 in Top Shape with the Right Parts<\/h2>\n\n\n\n<p>Staying ahead of your Audi A4&rsquo;s maintenance is the best way to keep it running like new and prevent many of the common issues that can arise as it ages. With the right replacement components, you can protect your investment and maintain the refined performance, comfort, and handling that make the A4 stand out. Having a trusted source for dependable and precisely engineered parts makes all the difference when it&rsquo;s time for repairs or preventive maintenance.<\/p>\n\n\n\n<p>Visit <a href=\"https:\/\/www.carparts.com\/euro\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"CarParts Euro\">CarParts Euro<\/a> for quality euro parts all in one place. Whether you drive a Mercedes, BMW, or any other European icon, you&rsquo;ll find premium parts from top brands crafted to match your vehicle&rsquo;s pedigree. CarParts Euro offers precision parts for peak vehicle performance, featuring components trusted by automotive engineers, including Bosch, Meyle, and Continental, ensuring an exact fit and uncompromising reliability.<\/p>\n\n\n\n<p>Backed by the trusted reputation of CarParts.com, CarParts Euro brings you an easier, faster way to shop for Euro car parts in the US. With decades of experience helping drivers maintain their vehicles, CarParts.com is known for its commitment to quality, transparency, and customer satisfaction. Keep your Audi A4 in peak condition with sturdy parts that meet the standards your car deserves.<\/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\"> 5<\/span> <span class=\"rt-label rt-postfix\">minutes<\/span><\/span>Whether you&rsquo;re planning to buy a new or used Audi A4, you&rsquo;re sure to get the best value for your&#8230; <a href=\"https:\/\/www.carparts.com\/blog\/audi-a4-reliability-and-common-problems\/\" rel=\"nofollow\">Read More<\/a><\/p>\n","protected":false},"author":1651,"featured_media":43095,"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":[2905],"tags":[3096],"ppma_author":[2607],"class_list":{"0":"post-43091","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-vehicle-reliability","8":"tag-audi-a4","9":"entry"},"acf":{"adrotate_specific_mobile_ad":"","adrotate_specific_desktop_ad":""},"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.5 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Audi A4 Reliability and Common Problems - In The Garage with CarParts.com<\/title>\n<meta name=\"description\" content=\"Find out the Audi A4\u2019s most common issues for different model years to know what parts you may need to replace in the future. 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