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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > N54 Turbo Engine / Drivetrain / Exhaust Modifications - 335i > Alternator generating correct voltage, battery not recharging?



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      08-30-2019, 09:19 PM   #1
chocstraw
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Alternator generating correct voltage, battery not recharging?

Hey guys,

I have a 335i, N54, that has been giving me a shit ton of problems as I try to sell it.

At the moment, my battery simply is not recharging. I don't drive it a whole lot as I try to sell it, but I have to jump it nearly every time I want to drive it. The only time it doesn't need this is if I drive for 2 hours plus, even so, it dies in a couple days.

I have checked INPA, and it says the alternator pulls about 14.x volts, and the battery was replaced 3 years ago. What could this be? I've reset battery adaptations, tried driving it at 3500-4000 rpm, etc. it still doesn't get where it should.

Any advice?

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