Q: Replaced the camshaft position sensor and still goes into safe mode ? 2000 BMW 740i

asked by on February 28, 2017

I was having problems with my car going into safe mode .. I hooked my computer up to it and it said that it was the cam shaft sensor in bank 1 ... I replaced it twice now and it keeps doing it saying bank 1 . I don't know what to do

My car has 143000 miles.
My car has an automatic transmission.

Hi there - I believe your real problem is a failed timing chain guide, which has shifted the cam timing beyond what the sensor can deal with. This is a common problem with BMW V8s with extended mileage. The solution for this is a thorough timing chain service - which includes the chain, tensioner, chain guides, and seals. I recommend a timing chain service performed by a mobile, professional mechanic, such as one from YourMechanic, who will come to your location, diagnose this problem, and give you an accurate assessment of damage and cost estimate for repairs. Note: if the water pump has not been service in recent history, you may consider replacing the water pump while the engine has been disassembled to this point - save repeated labor cost.

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