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Knock Sensor

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Fast Shipping
Free Shipping on orders over $99.
We ship from multiple warehouses across the country, so you get your part as soon as possible.
Industry Leading Warranty
Free, one year (or more), unlimited mileage warranty. Covers everything; parts and shipping costs.
Easy Returns
Return for any reason within 60 days for a full refund.
guaranteed exact fit
We've reviewed over 1,000,000 fitments to guarantee exact fit.

Knock Sensor Top Sellers

$22.41
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Brand: BuyAutoParts

Vehicle:Knock Sensor

Part Number: 33-21529AN

Condition: New

Warranty: 1Year Unlimited Mileage Warranty

Is this item compatible with your vehicle? Click Here

$21.41
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Hrs
Min
and it ships today!

Brand: BuyAutoParts

Vehicle:Knock Sensor

Part Number: 33-20833AN

Condition: New

Warranty: 1Year Unlimited Mileage Warranty

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Vehicle:Knock Sensor

Part Number: 33-21050AN

Condition: New

Warranty: 1Year Unlimited Mileage Warranty

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$61.41
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Brand: BuyAutoParts

Vehicle:Knock Sensor

Part Number: 33-21009AN

Condition: New

Warranty: 1Year Unlimited Mileage Warranty

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$250.41
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Brand: BuyAutoParts

Vehicle:Knock Sensor

Part Number: 33-21042AN

Condition: New

Warranty: 1Year Unlimited Mileage Warranty

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$32.41
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Brand: BuyAutoParts

Vehicle:Knock Sensor

Part Number: 33-21296AN

Condition: New

Warranty: 1Year Unlimited Mileage Warranty

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$21.41
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Hrs
Min
and it ships today!

Brand: BuyAutoParts

Vehicle:Knock Sensor

Part Number: 33-21078AN

Condition: New

Warranty: 1Year Unlimited Mileage Warranty

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$22.41
Order within
Hrs
Min
and it ships today!

Brand: BuyAutoParts

Vehicle:Knock Sensor

Part Number: 33-21020AN

Condition: New

Warranty: 1Year Unlimited Mileage Warranty

Is this item compatible with your vehicle? Click Here

$21.41
Order within
Hrs
Min
and it ships today!

Brand: BuyAutoParts

Vehicle:Knock Sensor

Part Number: 33-20652AN

Condition: New

Warranty: 1Year Unlimited Mileage Warranty

Is this item compatible with your vehicle? Click Here

Knock Sensor

Knock Sensor

Knock Sensor

A Knock Sensor responds to spark knock caused by pre-detonation of the air/fuel mixture. The main purpose of the knock sensor is to monitor the performance of the engine. It is a sensor that is screwed into the engine's block or cylinder head. The knock sensor sends signals to the Powertrain Control Module (PCM) to control the engine's timing.

The knock sensor protects other car parts like pistons, rods, valves, gaskets and plugs from getting damaged due to engine knock. When the flame moves out from the spark plug ignition point, the pressure waves present in the combustion chamber crash into the piston or cylinder walls creating a knocking sound. If your car's knock sensor is not functioning properly, you can find an OEM knock sensor replacement at Buy Auto Parts at an unbeatable price.

At Buy Auto Parts we stock a wide range of knock sensors for all car makes and models. All our car parts have been tested thoroughly and come with a warranty. To view the parts that fit your vehicle by selecting the right year, make and model of your car from our online catalog. We provide free shipping on all purchases above US $99. If you have any questions regarding your car parts, call our toll-free support line at 1-888-907-7225 or email us at [email protected].

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