{
    "lazyNodes": false,
    "abFitnotesFlag": false,
    "abCrawlReviews": false,
    "productOptionsCookie": false,
    "orderDelayFlag": false,
    "skipSessionCookie": false,
    "covidMessage": false,
    "fullTitleCookie": false,
    "nrLoggerCookie": false,
    "checkoutReviewCookie": false,
    "productOptionSeqCookie": false,
    "maintenanceFlag": false,
    "bufferETACookie": false,
    "multiShippingDiscountFlag": false,
    "newFitmentFlag": false,
    "surveyOptInFlag": false,
    "crossSellFlag": false,
    "skuMappingFlag": false,
    "paySplitCookie": false,
    "callDisableFlag": false,
    "zipPaymentFlag": "u",
    "hassleFreeReturn": false,
    "lifetimeReplacement": false,
    "cpn_off": false
}
Select your vehicle

Knock Sensors

Poor acceleration, drags, and thumping sounds coming from the engine are some of the signs of a failing knock sensor. Good thing CarParts.com has a wide selection of high-quality knock sensors at unbeatable prices, so shopping for a replacement that fits your vehicle won’t be difficult. All are on hand and ready to ship to your doorstep. Browse our catalog to find the best replacement knock sensor for your ride today!
Refine by:
See All
See All

Shop Catalog

Showing 1 - 15 of 1083 results
Display item:
15
30
45
Sort by:
Knock Sensor
Part Number: REPM311201
Vehicle Info Required to Guarantee Fit
$13.61
Product Details
Notes : Without wiring harnessConfiguration : 2 Blade Male Terminal & 1 Female ConnectorQuantity Sold : Sold individuallyWarranty : 1-year Replacement unlimited-mileage warrantyProp 65 Warning :

Warning SymbolWARNING: This product can expose you to chemicals including Phthalates, which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Interchange Part Number : KS225Returns Policy : 60-Day Return Policy
Knock Sensor
Part Number: SET-REPM311201-2
Vehicle Info Required to Guarantee Fit
$26.49
Product Details
Notes : Without wiring harnessComponents : (2) Knock SensorsConfiguration : 2 Blade Male Terminal & 1 Female ConnectorQuantity Sold : Set of 2Warranty : 1-year Replacement unlimited-mileage warrantyProp 65 Warning :

Warning SymbolWARNING: This product can expose you to chemicals including Phthalates, which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Interchange Part Number : KS225Returns Policy : 60-Day Return Policy
Knock Sensor
Part Number: SET-REPM311201-4
Vehicle Info Required to Guarantee Fit
$52.99
Product Details
Notes : Without wiring harnessComponents : (4) Knock SensorsConfiguration : 2 Blade Male Terminal & 1 Female ConnectorQuantity Sold : Set of 4Warranty : 1-year Replacement unlimited-mileage warrantyProp 65 Warning :

Warning SymbolWARNING: This product can expose you to chemicals including Phthalates, which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Interchange Part Number : KS225Returns Policy : 60-Day Return Policy
Knock Sensor, Nippondenso
Part Number: REPT311205
Vehicle Info Required to Guarantee Fit
$11.49
Product Details
Notes : Nippondenso; Without wiring harnessConfiguration : 1-Prong Blade Male Terminal; 1 Female ConnectorQuantity Sold : Sold individuallyWarranty : 1-year Replacement unlimited-mileage warrantyProp 65 Warning :

Warning SymbolWARNING: This product can expose you to chemicals including Phthalates, which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Interchange Part Number : KS159Returns Policy : 60-Day Return Policy
Knock Sensor, Nippondenso
Part Number: SET-REPT311205-2
Vehicle Info Required to Guarantee Fit
$21.99
Product Details
Notes : without Wiring Harness, NippondensoComponents : (2) Knock SensorsConfiguration : 1-Prong Blade Male Terminal; 1 Female ConnectorQuantity Sold : Set of 2Warranty : 1-year Replacement unlimited-mileage warrantyProp 65 Warning :

Warning SymbolWARNING: This product can expose you to chemicals including Phthalates, which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Interchange Part Number : KS159Returns Policy : 60-Day Return Policy
Knock Sensor, Matsushita
Part Number: REPT311206
Vehicle Info Required to Guarantee Fit
$14.99
Product Details
Notes : Matsushita; Without wiring harnessConfiguration : 1-Prong Blade Male Terminal; 1 Female ConnectorQuantity Sold : Sold individuallyWarranty : 1-year Replacement unlimited-mileage warrantyProp 65 Warning :

Warning SymbolWARNING: This product can expose you to chemicals including Phthalates, which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Interchange Part Number : KS81Returns Policy : 60-Day Return Policy
Knock Sensor, Matsushita
Part Number: SET-REPT311206-2
Vehicle Info Required to Guarantee Fit
$28.49
Product Details
Notes : without Wiring Harness, MatsushitaComponents : (2) Knock SensorsConfiguration : 1-Prong Blade Male Terminal; 1 Female ConnectorQuantity Sold : Set of 2Warranty : 1-year Replacement unlimited-mileage warrantyProp 65 Warning :

Warning SymbolWARNING: This product can expose you to chemicals including Phthalates, which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Interchange Part Number : KS81Returns Policy : 60-Day Return Policy
Knock Sensor, Direct Mounting Type
Part Number: REPN311203
Vehicle Info Required to Guarantee Fit
$9.99
Product Details
Notes : Direct mounting type; Without wiring harnessConfiguration : 2 Blade Male Terminal & 1 Female ConnectorQuantity Sold : Sold individuallyWarranty : 1-year Replacement unlimited-mileage warrantyProp 65 Warning :

Warning SymbolWARNING: This product can expose you to chemicals including Phthalates, which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Interchange Part Number : KS214Returns Policy : 60-Day Return Policy
Knock Sensor, Direct Mounting Type
Part Number: SET-REPN311203-2
Vehicle Info Required to Guarantee Fit
$18.99
Product Details
Notes : Direct mounting type; Without wiring harnessComponents : (2) Knock SensorsConfiguration : 2 Blade Male Terminal & 1 Female ConnectorQuantity Sold : Set of 2Warranty : 1-year Replacement unlimited-mileage warrantyProp 65 Warning :

Warning SymbolWARNING: This product can expose you to chemicals including Phthalates, which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Interchange Part Number : KS214Returns Policy : 60-Day Return Policy
Knock Sensor
Part Number: REPB311201
Vehicle Info Required to Guarantee Fit
$23.99
Product Details
Notes : Without wiring harnessConfiguration : 1-Prong Pin Male Terminal; 1 Female ConnectorQuantity Sold : Sold individuallyWarranty : 1-year Replacement unlimited-mileage warrantyProp 65 Warning :

Warning SymbolWARNING: This product can expose you to chemicals including Phthalates, which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Interchange Part Number : KS45Returns Policy : 60-Day Return Policy
Knock Sensor
Part Number: SET-REPB311201-2
Vehicle Info Required to Guarantee Fit
$45.49
Product Details
Notes : Without wiring harnessComponents : (2) Knock SensorsConfiguration : 1-Prong Pin Male Terminal; 1 Female ConnectorQuantity Sold : Set of 2Warranty : 1-year Replacement unlimited-mileage warrantyProp 65 Warning :

Warning SymbolWARNING: This product can expose you to chemicals including Phthalates, which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Interchange Part Number : KS45Returns Policy : 60-Day Return Policy
Knock Sensor, Bolt Mounting Type, With Wiring Harness
Part Number: RK31120001
Vehicle Info Required to Guarantee Fit
$12.49
Product Details
Notes : Bolt mounting type; With wiring harnessConfiguration : 2 Blade Male Terminal & 1 Female ConnectorReplaces OE Number : 392502B000Quantity Sold : Sold individuallyWarranty : 1-year Replacement unlimited-mileage warrantyProp 65 Warning :

Warning SymbolWARNING: This product can expose you to chemicals including Phthalates, which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Interchange Part Number : KS392, 392502B000Returns Policy : 60-Day Return Policy
Knock Sensor
Part Number: REPH311203
Vehicle Info Required to Guarantee Fit
$18.49
Product Details
Notes : Without wiring harnessConfiguration : 1-Prong Blade Male Terminal; 1 Female ConnectorQuantity Sold : Sold individuallyWarranty : 1-year Replacement unlimited-mileage warrantyProp 65 Warning :

Warning SymbolWARNING: This product can expose you to chemicals including Phthalates, which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Interchange Part Number : KS64Returns Policy : 60-Day Return Policy
Knock Sensor, Screw-In Mounting Type
Part Number: REPH311208
Vehicle Info Required to Guarantee Fit
$14.49
Product Details
Notes : Screw-in mounting type; Without wiring harnessConfiguration : 1-Prong Blade Male Terminal; 1 Female ConnectorQuantity Sold : Sold individuallyWarranty : 1-year Replacement unlimited-mileage warrantyProp 65 Warning :

Warning SymbolWARNING: This product can expose you to chemicals including Phthalates, which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Interchange Part Number : KS102Returns Policy : 60-Day Return Policy
Knock Sensor, Screw-In Mounting Type
Part Number: RL31120001
Vehicle Info Required to Guarantee Fit
$14.88
Product Details
Notes : Screw-in mounting type; Without wiring harnessConfiguration : 1-Prong Blade Male Terminal; 1 Female ConnectorReplaces OE Number : 8961530080Quantity Sold : Sold individuallyWarranty : 1-year Replacement unlimited-mileage warrantyProp 65 Warning :

Warning SymbolWARNING: This product can expose you to chemicals including Phthalates, which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Interchange Part Number : KS161, 8961530080Returns Policy : 60-Day Return Policy
Page 1 of 73 | Showing 1 - 15 of 1083 results

Top Rated Products

Replacement Knock Sensor
$26.49( Review)
it works just great so nice so very nice
Brady F.
VERIFIED PURCHASER
Replacement Knock Sensor
$13.61( Review)
Fit was perfect for 08 highlander. Have not had any issues since install. Can beat thSee More
Troy S.
VERIFIED PURCHASER
Very good product
David B.
VERIFIED PURCHASER

Popular Products

1811734 Knock Sensor
Part No: GPD1811734
( Review)
$26.49
242-1056 Knock Sensor
Part No: 2421056
( Review)
$33.99
Knock Sensor
Part No: REPM311201
( Review)
$13.61

Product Questions & Answers

Q:I'm looking for the cheapest knock sensor for a 2002 Honda Accord ex 2.3l 4 cylinder engine. It says a f23A1 on the mount on engine if that matters so I get the right one. Thank you so much for the help? Show Less
Darrell R.
A:BEST ANSWERHi Darrell, thank you for reaching out. This item is a very affordable brand-new knock sensor for your 2002 Honda Accord EX with a 2.3-liter engine. You can use this link to continue ordering the part at a discounted price today: https://www.carparts.com/knock-sensor/replacement/reph311203?can=CPAP3648_CSQA_20230405 I hope this helps. Happy shopping. Show less
Aldrin P.
 
3 Questions, 1 AnswerView all Q&As >

Shopping for Knock Sensor

Knock Sensor Shopping Info

What Is a Knock Sensor?

The knock sensor is a device that sends a signal to your vehicle’s powertrain control module (PCM) when it detects an engine knock, which occurs when the ignition timing is off. The PCM uses the data to adjust the timing and resolve the excess detonation in the ignition cycle.

How Much Does a Knock Sensor Replacement Cost?

A knock sensor can cost anywhere between $10 and $100, depending on factors like its brand, configuration, and your vehicle’s specifications. Labor costs for replacing a knock sensor usually range anywhere from $180 to $250. It varies based on the rates in your area and your vehicle’s make and model.

Shop for an Aftermarket Knock Sensor Replacement on CarParts.com

Here at CarParts.com, you never have to worry about long lines and waiting times just to get the part you need. All you have to do is enter your rides year, make, and model into our website’s vehicle selector to find the product that best matches its specifications, and check out securely in a matter of minutes一it’s that easy! You may also use the search filters to find a sensor according to your preferred brand, price range, sensor configuration, and more.

Worried about quality? We’ve got you covered! All our products passed the highest quality control standards from the most trusted names in the industry, so you’re sure to get a knock sensor replacement that’s built to last. Our top-notch knock sensors also come with a low-price guarantee to help you get your daily driver back into shape without going over budget for your repairs. Order anytime, and get the part you need delivered to your doorstep in as fast as two business days. Check out our knock sensors today and take advantage of our unbeatable prices only here at CarParts.com!

Helpful Automotive Resources

P0334 Code: Knock Sensor 2 Circuit Intermittent (Bank 2)
P0334 Code: Knock Sensor 2 Circuit Intermittent (Bank 2)Diagnostic trouble code (DTC) P0334 stands for “Knock Sensor 2 Circuit Intermittent Bank 2.” The code is set once the powertrain control module (PCM) doesn’t receive the right signal from the knock sensor located in Bank 2.
8 of the Most Important Car Sensors You Should Know About
8 of the Most Important Car Sensors You Should Know AboutThese sensors also play an important role in optimizing your vehicle’s overall performance. They help the PCM adjust the fuel mixture and regulate ignition timing, among other things. The Most Common Types of Car Sensors
P0326 Code: Knock Sensor 1 Circuit Range / Performance Bank 1
P0326 Code: Knock Sensor 1 Circuit Range / Performance Bank 1Knocking refers to the unwanted vibration and noise that could damage an engine. This is typically the result of fuel with too low of an octane rating, overly advanced ignition timing, or extreme engine operating temperatures. The PCM may also perceive an internal engine problem, such as a failed rod