Subaru Engine Knock Sensor - 1AEKS00001

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Product Reviews
Vehicle Fit

This replacement Engine Knock (Detonation) Sensor is just what you need to get your Subaru in good running order again!

A knock sensor is like a small electronic microphone that is usually attached to the engine block and listens for a couple of things that a engine might do. One thing it listens for is pre-ignition or knocking inside the engine usually caused by a few issues including dirty gas, wrong engine timing low octane fuel, and also by the wrong spark plugs. It also listens for engine run on which happens when the vehicle is turned off, but tries to keep running until it stalls. Once a noise is detected, the knock sensor sends a signal to the cars computer which in turn will retard the timing at 2 degree intervals until it corrects the issue. If the knock sensor fails, it can seriously damage the engine, as continuous pre-ignition can cause fracture in the pistons.

This knock sensor features the following specifications:

  • 100% New not remanufactured
  • Built to strict quality control standards

This Engine Knock Sensor makes a great replacement and has substantial cost savings over a dealer unit.

Our electrical and electronic parts are subject to strict quality control testing. Please ensure proper diagnosis of this item before purchasing as the item cannot be returned once installed or plugged in.

Item Condition: New

Attention California Customers:

WARNING: Cancer and Reproductive Harm -

Lifetime Warranty

This item is backed by a Limited Lifetime Warranty. In the event this item should fail due to manufacturing defects during intended use, we will exchange the part free of charge (excludes shipping charges) for the original purchaser.

5.00/ 5.0
5 reviews
5 Stars
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1 Star
Exact fit
October 26, 2013
Did the Trick
Had a knock sensor error code on my 2000 Forester. Easily replaced (using a 1/2" drive ratchet, six inch extender, wobble socket and 12mm socket). No more code.
November 20, 2016
Perfect Replacement
Worked great in my 2001 Subaru Outback. The part appears identical to the OEM sensor and cleared my P0328 CEL code (knock sensor voltage). The car runs much more smoothly now because the timing is not being pulled and the gas mileage has nearly doubled. Easy swap with a 6" ratchet extension (borrowed from Oreilly).
August 29, 2017
Part fit perfectly
Exactly what I was looking for bolted into place engine light is off all is well
November 16, 2017
What I liked about this company,it was very self explanatory to order on line. I was also pleased on how part was shipped to me in a reasonably timely matter and it was well packaged and was not broken. I would recommend this company to all my friends and family, thank you for a job well done.
December 2, 2018
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Year Make Model Description
1999-2002Subaru Forester Subaru Forester Engine Knock Sensor H4 2.5L
1999-2002Subaru Impreza Subaru Impreza Engine Knock Sensor H4 2.5L
1999-2002Subaru Impreza Subaru Impreza Engine Knock Sensor H4 2.2L
1999-2002Subaru Impreza Outback Subaru Impreza Outback Engine Knock Sensor H4 2.5L
1999-2001Subaru Legacy Subaru Legacy Engine Knock Sensor H4 2.5L
2000-2001Subaru Outback Subaru Outback Engine Knock Sensor H4 2.5L
Part #: 1AEKS00001

Order must be placed by 4pm ET
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Estimated Arrival Cost

Deliveries made to PO Boxes and FPO may take longer. See our Shipping & Delivery for more information.

Get it in: 2 - 4 Business Days

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