Symptoms: Flickering lights, and occasional hiccup start. Now battery light is coming on and staying on. When stationary battery tests around 12.5 volts. When running, that drops to 11.7 volts.
Cons: flickering lights, hiccup start
Reviews of Bosch alternator
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On my '93 240, I used a 740 external regulator Bocsh alternator...100amps...the problem is is that the voltage regulator takes a dump, which leads to people replacing the entire unit (like me years ago).
Pros: 100 amps
Cons: voltage regulator fails
Vehicle:
Volvo
If anyone is curious, the 120a Bosch and Valeo alternators (rectangle ground connection) are completely interchangeable despite the statements online saying they have different pullies and mounting points. They are slightly different but everything lines/bolts up the same. The Bosch (left) is a decent amount larger in size, not sure why, but it fits perfectly with no clearance issues.
Pros: fits perfectly, no issues
Cons: slightly different in size
I just bought this car and I was about to replace the alternator belt but realized it’s not aligned. From this prospective the alternator is too far to the right
FWIW I bought an oreilly\u2019s remanufactured for my e34 a few years ago. It failed and was replaced twice in two years until I just bought the Bosch from FCP. No issues since.
Pros: no issues with Bosch
Cons: failed and replaced twice
Vehicle:
BMW
The forums are riddled with people who tried to save a few bucks & got what they paid for. The DME on an e90 is extremely fickle. DO NOT buy an alternator unless it\u2019s a Bosch.
Pros: Bosch is recommended
Cons: DME is fickle
Vehicle:
BMW
Volvo tech here, Bosch. Just replace the whole thing, it's not worth doing the brush job only to find that you should've just done the whole thing first.
Pros: replace the whole thing
Cons: brush job not worth
Vehicle:
Volvo
I ordered the genuine Bosch alternator for not even 300 bucks and installed it myself for him still good a year or so later and it was a very easy job
Pros: easy job, good quality
Vehicle:
BMW
I replaced the battery, and upgraded to an AGM battery while I was at it. The problem still wasn’t solved though.
Pros: upgraded to AGM
Cons: problem not solved
Vehicle:
Volkswagen Corrado
Alternator and the battery are overpriced 2x (google replacement Varta battery and smth like Bosch alternator for your car on pkwteile or idealo).
Cons: alternator, battery overpriced
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