I just replaced the one in my daughter's Mk 4 with a rebuilt 120A Bosch one from Rock Auto last week.
I would go Bosch if I had the option. Mine went out on a road trip. I had to go with what option was available at the auto store I was able to limp to. Lucky there was one close by but it was who knows what brand. It was my only option so I bought it. Probably duralast or something but it’s working 2 years later.
I had a car get flooded for 6 months and the Bosh alternator still worked perfectly for another 21 years. Would buy again
Fcp euro has an 100amp bosch one that works well. They have a lifetime warranty too.
Funny enough, I just did this dance today! Found a nearly new looking Bosch unit that someone had already kindly removed from the wrecker's car for me. Got it installed and tested exactly like yours though, so I'm happy.
imo take it back and grab a new Bosch from FCPEuro - https://www.fcpeuro.com/products/volvo-alternator-bosch-al157x
I've replaced the alternator Bosch 0124615028 with an identical part number one. Then I replaced the F00M-145-435(or 385 depending on where you look) regulator on it with a AS-PL ARE0075P. Both regulates to the same voltage, 14.2V.
Even brand name remans like Bosch and denso are suspect but generally much less so.
I replaced the Alternator on my 2016 Mini Cooper Paceman with a brand new Bosch Alternator. For whatever reason the Alternator is only putting out 11-11.6 volts.
I had a Bosch alternator die in <6 months. Got installed in November 2024 and it died a few weeks ago.
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