04 bmw x5 battery/altenator

Asked by Flick Aug 06, 2017 at 11:06 PM about the BMW X5 M

Question type: Maintenance & Repair

I changed my altenator out and after 2
weeks my battery is draining but my
altenator is passing test...did i need to reset
the computer after i replaced the altenator?

5 Answers
22,660

Guru9FSV8 answered 7 years ago

Is your battery not charging or draining overnight? what is voltage on battery while engine running? Do you have a parasitic drain?

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22,660

Guru9FSV8 answered 7 years ago

Bad battery due to faulty old alternator? Dead cell? Did you get a bad new alternator?

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22,660

Guru9FSV8 answered 7 years ago

Are all connections tight and on clean metal connections? Did you disconnect negative post on battery before replacing alternator? Did you short something out by not disconnecting the battery?

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22,660

Guru9FSV8 answered 7 years ago

Have you checked ground connections and resistance on these wires due to age of vehicle? YouTube has many videos of how to do this. ChrisFix author is a good one

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GuruP98NF answered 4 years ago

The bmws are computer over design nightmares, no dip stick- what the? Any electrical replacement I would bet needs a computer check.

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Your Answer:

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