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When it comes to replacing ignition parts, use only what the car came with. With this in mind, the BMW online parts reference site Real OEM provides this info on this knock sensor.
Part Groups is the knock sensor with the corresponding part number.
The parts retailer ECS is a great site that shows discount pricing in U.S. dollars, and pictures of the part.
Do not use any other parts unless they are other OEMs who make the part to BMW’s specifications. Just because a M3 uses Bosch parts and that “Motorsport” sensor is Bosch, this does mean it will work on the M3 simply because it’s a Bosch part - don’t use that “Motorsport” part.
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Originally posted by Altaran View PostSince I am currently rebuilding my engine, I am also considering replacing the know sensors. Just because they are 20 years old now.
I think the knock sensors are micro-machine (tuning fork edged on silicone wafer substrate to pick up the vibration frequency with no wear and tear).
Last edited by sapote; 02-20-2023, 11:38 AM.
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