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Old 07-20-2021, 02:49 PM
Join Date: May 2009
Location: NJ GSP 145
Posts: 49
docnabimmer is on a distinguished road

was wondering if any of you can give a suggestion how to proceed from here.
Car : 05 E53 M54 162500 miles no ses.Well maintained.Stock
Symptom: Wife puts car in reverse- gets long beep then beeping stops and PDC button blinking.PDC inoperative
WHAt I did so far: Checked #6 fuse(E53) intact ,swapped with known good fuse.Same long beep on reverse .Still not working,Checked rear sensors with my stethoscope- ALL REAR Sensors have TICKING sound, went to check the front -ALL ARE QUIET and SILENT
Question: could ALL 4 FRONT sensors be bad OR could it be a wiring or software issue?
Any suggestions (general) where to go from here to diagnose the issue?
Thank you in advance .Will post question on Xoutpost too ....
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Old 07-20-2021, 03:04 PM
Join Date: Mar 2016
Location: Saskatchewan Canada
Posts: 1,200
80stech is on a distinguished road
All 4 sensors could be bad if they have been replaced with cheap aftermarket ones. You might have a problem with the connector for the sensors but I think the bumper cover will have to come off to check. There is a ton of diagnostic information on the PDC available if you have a good scan tool.
1988 325is (purchased new)
2004 X5 3.0 (new to me) 2005 X3 2.5 (new to wife)
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Old 07-20-2021, 09:51 PM
wpoll's Avatar
Join Date: Sep 2015
Location: South Island, New Zealand
Posts: 3,785
wpoll will become famous soon enough
Sounds like the front PDC loom has become disconnected.

You can check it by removing the right-side fog light - if you have small hands!
2005 BMW X5 3.0d (b 02/05)
2001 BMW F650GS Dakar (b 06/01)
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Old 07-21-2021, 05:29 PM
Join Date: Feb 2011
Location: Calgary, Canada
Posts: 2,079
Clockwork is on a distinguished road
I had same issue. Could never solve it by replacing with OE sensors... I finally disabled the frint sensors using NCS Expert. Then I was still getting rear errors, so I grabbed a used module from a pick n pull location adn swapped it in (trunk, by battery compartment) and BOOM, fixed my issues.
I swear, my cars are like a girlfriend.
Sometimes its a rough ride, sometimes its smooth motorin'.
Sometimes she doesnt like how i treat her and sometimes i dont like how she behaves.
BUT at the end of the day, she loves it when I am inside her.

'91 850i
'05 X5 4.4i
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Old 07-23-2021, 08:31 AM
Join Date: May 2009
Location: NJ GSP 145
Posts: 49
docnabimmer is on a distinguished road

thanks for the info,will keep that in mind.
My solution: did a hard reset , did not cure issue , however, for some odd reason , i could hear the 3 front sensors now and was able to pinpoint the defective front drivers PDC sensor...this car just has weird electrical gremlins that i cant explain...
new part ordered(vemo)
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