Alternator Bosch or VALEO

I ended up getting a new Bosch AL49X from Bavarian Autosport (back in the day). IIRC, I needed to purchase a new pulley and fan since the old ones were Valeo and incompatible with Bosch. I sort of remember also needing a different / non-standard belt length.

Mine turned out to be a 60/90A by Valeo, replaced it with an OEM 100A BOSCH refurbisged one for like... 150 bucks, send in the old one and got fiddy bucks back. Was for sure a pretty colid upgrade and You even feel a difference in the Performance.

I installed the Valeo alternator that I got from FCP Euro and everything works now. The rebuilt Valeo was $200 less expensive than the Valeo that O’Reilly’s had in their computer but couldn’t order themselves. Also it was immaculate. It was a true rebuild and looked brand new in every way. It was $400.

*Hella* is €216 to €380, *Bosch* is €212 to €432. Location: Germany, "*autodoc"* website

I've got the flickering lights so I'm going between the Denso reman and Bosch reman. Looks like the Bosch reman is done in house and the germans have pretty good engineering imo.

I recently replaced my alternator on one car w/a new Bosch unit. Cost about $200 and took me a couple of hours. Dealer cost just for the part was $700 and with book time they priced it out at over $1,400.

I tried to correct with a new and proper group size battery - it had an OE 140A Bosch alternator and starter with a 2016 El Cheapo battery that was one group size too small so I replaced the H5 with a new H6 group and all was good for a few days... I also replaced the starter just because I like to spend $ and wanted a clean slate as this a vehicle I intend to keep and drive daily as needed. The new battery/starter work great but I noticed right away that the voltage while at idle was now almost a full 2 volts lower than before changing any of the afore mentioned parts. I have a P3 dash vent gage that reads to 0.1V and I use a VOM plus VCDS so I know the P3 reads OK. Before changing any parts the P3 read 13.5 to 14.4 volts steady depending upon what accessories were on. After the H6 battery the P3 read 11.5 to 12.5 volts under the same driving conditions. I tried to get the OE alternator bench tested but that did not work so I just went with a new reman Bosch unit. No change in voltage with the new alt... So this past weekend the motor fired up just fine and the dash vent P3 gage display was 12.5V but while driving around town running errands the voltage kept dropping all the way down to 9.0V which caused the DSG to lock and basically leave me stranded miles from home. I will try to get the entire electrical system load tested this weekend but for now I just keep a tender on the batter at night as I do not drive much during the week nor do I commute. The tender keeps the battery at 13.0V reliably.

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

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).

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.