Hi I have a 2005 E61 525i with PDC front and back. When I bought the car it had "PDC failure" on the iDrive panel. I was told one sensor was broken. I wasn't aware of the "listening method" at that time so couldn't control it.

When I later did the test only one and sometimes two sensors at the back clicked. None of the front sensor did a single sound. I've done the test several times with same result.
When I connected my INPA tool to the car I got 6 error codes in the PDC system. All of them was I think broken sensors.

Is there any connection that tends to fail to the front sensors? Seems strange to me that every sensor should be broken. I'ts quite expensive to change six sensors so I wan't to make sure that the sensors itself is really the problem in all cases.

Under the spare wheel it's completely dry and I've already change the PDC module with the same result as above.

Please help me with this irritating problem. Thank you in advance!

/Rikard

 

It might not be the sensors. It could be broken wires leading to the sensors - I just had to splice and repair a few of the wires on the front (had to remove the bumper. Your INPA codes should tell you whether it is a broken wire or faulty sensor (mine had both listed, but was just the wiring).