BMW Repair Questions? Ask a Mechanic for Answers ASAP
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the problem is that the abs/traction control system is cutting in when it should not be
for some reason, the system either thinks the car is slipping, or there is some other issue with the abs/traction components causing the system to cut in when it should not
if the lights stay on, this means that faults should be set in the abs/traction control module which can be read out with a scan tool.
alternatively, a bmw scan tool can also be used to monitor the live data from the system and identify what is cutting in.
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no, it is not normal. what you are experiencing is not normal operation
it is designed to kick in when the car is slipping only, not when there is a fault. if it is cutting in when the car is not slipping, it is the fault causing this, not some kind of back up that makes it kick in just because there is a fault detected.there is a malfunction that is making it think the car is slipping, or making it cut in for unrelated reasonsyou need to have the diagnostics I described carried out to verify what is either making it think its slipping, or what is making it cut in randomly. Please do not forget to click a positive rating
when the traction light is flashing, this is the traction cutting in because it thinks the car is slipping
when the lights come on permanent, this means the system is fully disabled, that's why the issue goes away
it is all one issue related to the abs/traction fault
cost completely depends on the component at fault, if a simple sensor it will be very cheap. if the control module or pump, expensive.
The oil leak is technically a different question per site policy and should be posted as its own question. I would be happy to answer your question about the oil leak free of charge, but cannot do so until I receive proper credit for my complete answer to the original question, via positive rating.. Please do not forget to click a positive rating