Oil Temperture sensor location
Can’t find a definite answer for the exact location of the oil temp sensor on a c63 w204 M156 engine.
Any photos or a diagram would be appreciated.
Thank you.
Last edited by MrAChuah; Dec 11, 2023 at 06:51 AM.
This one would be about an hour or so job to replace. The other one on your photo behind the AC compressor will be like a 10 hour job.
Conflicting info about which one it actually is. I’m sure on this model there’s only 1 oil temp sensor however the same part is used also for coolant temp sensor.
sickSVT is correct. 👍
Thanks.
Last edited by MrAChuah; Dec 14, 2023 at 02:43 PM.
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One question I've heard asked but not answered is whether you have to remove anything if you don't know if you need to replace the sensor, you just want to pull [and reconnect] the connector. Do any of you know the answer to that?
Also, If I remove the ECU connector and read back through the sensor to ground, any idea what resistance it should read when cold?
When I read the oil temp pid with my iCarsoft scanner, I see that it has almost regular very clean spiky pulses from between -41C up to -32C. Not what I would expect from either a faulty sensor or an oily wire so i'm wondering if what I'm seeing is the actual sensor output or if it's a calculated/test value from the ECU.
Thanks in advance for whatever info you might be able to offer.
Graph of oil temp pid when display is showing only blank underlines
Last edited by Howard_Woodard; Aug 29, 2025 at 08:27 PM.







