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Steve, BMW Expert
Category: BMW
Satisfied Customers: 25230
Experience:  BMW Expert
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parking distance sensor will not work on car after fitting

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parking distance sensor will not work on car after fitting new ones, this is on bmw 523i estate touring , rear sensors
why were the sensors all replaced?
Customer: replied 3 years ago.

yes every one of them on rear bumper

I asked why all sensors were replaced. surely not every sensor failed at the same time.
Customer: replied 3 years ago.

no but well I got bumper off I changed all of them , at the time it was forward think if one had packed up then it would not be long before the rest would so I changed all of them at the same time

I will provide an honest answer. I trust this will be appreciated on a saturday. Please remember that a low rating PUNISHES me for being honest and that I receive nothing for my time until a positive rating is clicked.

the most likely cause is the one is defective or not installed/connected correctly, which can bring the entire system offline

when the car is in reverse the sensors should be making a clicking noise when you put your ear close to each one. any that are not clicking are bad/disconnected

the only other possibility would be a module fault, but this would require proper computer diagnostics to verify/diagnose fully

Please let me know if you have further questions. Please do not forget to click a positive rating as this is the only way I receive credit for my answer, thank you. Best wishes with your vehicle.

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