A bmw x5 battery drain can be a nightmare to solve. In this case the cause of this bmw battery drainage was surprising yet these bmw battery drain problems can be anything. Here is one that you should watch out for as there were no fault codes at all and the locks worked perfectly. bmw x5 battery drain problems can start with the car not sleeping or waking up when it is supposed to be sleeping. It takes good old detective work to find these battery drain problems. I hope that this tip will help when you have pulled out the fuses and the K CAN is asleep. At these times you may wonder what the issue is when you try everything else and nothing seems to be draining the battery .

This drainwas around 130 / 180 mA as it kept on fluctuating. The correct parasitic draw on a bmw when asleep ahould be around 0.035/0.065 A.
'
I hope that this helps.

Avoid aftermarket door lock actuators as in this case it was a cheap part that was draining the battery by waking repeatedly.

свернуть