BMW Crankshaft Position Sensor?

Question

I read the list of faults found in my flood damaged 2000 BMW M5, and the CPS was mentioned. I now have two questions regarding this part:

1. Will a CPS from a 2002 M5 work in my 2000?

2. Could this be causing a rough idle/shut off immediatly after start up?

Answer 1

Yes, a CPS from 02 is the same as an 00 (P/N 12 141 742 629).

But no, a bad CPS I believe would not cause a rough idle/shut off after startup. Why ? Because a bad CPS signal would not allow the engine to start in the first place. No BMW engine will start with a bad CPS.

Do not think that you have to disregard the CPS fault. After making sure that the wires/connector to the CPS are clean, not burnt and properly connected, you still have to replace it.

You would be lucky if after cleaning the wires/connectors, the engine fires up nicely.

But you still have to look for other faults/problems lurking in your engine's electronic controls. Any flooded out car needs to have each and every electrical connector and module cleaned with electronic spray and air (connectors disconnected, key off, and battery disconnected).

Post your other faults for further analysis if you want.

EDIT:

After cleaning the control modules and connectors, clear the faults, then re-check for faults that come back. These remaining faults would be the ones that need serious diagnoses.

Answer 2

It is very possible that it could be causing your rough idle/shut off.  I had that on a 3 series I used to have and replaced the CPS and took care of it.  As far as the compatibility, I would call a BMW dealership to be 100 percent sure.  I want to say yes but they can look it up on their computer to make sure the part numbers are the same for free, so just make the call to be sure.  Good luck!

Answer 3

I bet your wishing you took my advice on dumping that car and maybe taking a loss right about now huh?  Yeah the Cps can do that so could a lot of other things.. I'll check the compatibility of the two sensors tomorow..

Oh boo hoo I got 2 thumbs down.. I bet thoes people have not been following the saga this guy has been going thru..