Acura RL Honda Civic Engine Knock Sensor - 1AEKS00002

This replacement Engine Knock (Detonation) Sensor is just what you need to get your vehicle 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:

  • Location:
    • Acura RL Models
      • LH (Driver Side) Engine (Front Bank)
    • Honda Civic Models
      • Underside of Vehicle, Rear of Engine
  • 100% New not remanufactured
  • Replaces dealer part numbers: 30530-P2M-A01, 30530P2MA01
  • Mounts to engine block
  • Built to strict quality control standards
  • Some models may use more then one
  • Mounting type: Screw in
  • Number of Terminals: (1)

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.  Once the item has been installed or plugged in, it is no longer eligible for a refund.  The item may be eligible for replacement, only if it is found to have a manufacturing defect. Before purchasing, please ensure proper diagnosis of the failed original part is performed


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.

1.5 / 5.0
2 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
Incorrect part for my D16Y8 engine
Installed the part, engine still set the 325 code. Replaced it with a $100 part from O'Reilly, and no check engine light or code. My conclusion was 1A sent me the wrong part, or it was defective.
February 21, 2017
1 year ago
Wrong thread
The thread on this knock sensor is sae 1/2.
12mm is the correct thread for 2001 acura
RL 3.5 Ca35a1 engine. I did not see a thread designation on the item description.
Maybe i missed it???
January 24, 2017
1 year ago
Response from 1A Auto
We are sorry to hear about the discrepancy you are experiencing. At your convenience please call us at 1-888-844-3393 so we may resolve this matter and find the correct part for you or initiate a return for full refund.
January 24, 2017
Alex P Staff
Start typing your question and we'll check if it was already asked and answered. Learn More
Browse 1 question Browse 1 question and 1 answer
What socket size do I use to take knocking sensor out?
Cesar m on Aug 9, 2017
BEST ANSWER: We do not know the exact socket size, but if you check an online forum for your vehicle, other owner's may share this knowledge.

Vehicle Fit

  • 1996-2004 Acura RL Engine Knock Sensor V6 3.5L Front Bank
  • 1996-2000 Honda Civic Engine Knock Sensor L4 1.6L (excluding SI Models)

This part replaces:

  • OE # 30530P2MA01
  • Standard Motor Products KS65
Part #: 1AEKS00002