Had the same in reverse. Bosch factory, Valeo worked fine though.
Remember the old Bosch and Valeo alternators where the brushes were built into the regulator, which cost $15 and came off the back with two screws? Pepperidge Farm remembers.
Bought a used Valeo alternator, and sure enough, the charging problems went away, and it starts charging as soon as I start the car.
I will always vote for a 10SI or 12SI GM alternator swap on an L-series engine. Affordable conversion bracket. 1-wire GM alternators are simple, reliable, cheap and readily available online but not easy to find in parts stores. 3 wire GM alternators are are easy enough to wire up and are absolutely everywhere in parts stores if you’re more concerned about parts availability and potential breakdowns on long adventures.
Cheapest for me was a new Valeo unit from Rockauto. Cheaper than Turner too.
My shitbox, I replaced my alternator just for my window motor to go bad, I replaced the window motor just for the thermostat to go bad the next day, it’s inevitable.
I had Valeo in my other car, very common for Bosche to overcharge.
Mesmo um Valeo novo está caríssimo, pede mais orçamentos.
Alternator is my wild guess: Valeo alternators have long sucked, kinda like their starter motors.
The indy shop I used diagnosed it as a bad alternator; I am so lucky ( s a r c a s m ) to have the Valeo (mega $$$$$) unit, they swapped it out a week later.
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If choosing alternator across many manufacturers, check the part ranking. If your choice is down to two brands, the PartReview part comparisons help.
We compare alternator across these categories:
In March 2026 on PartReview, alternator VALEO were overall better than GENERAL MOTORS.
In March 2026 on PartReview, alternator VALEO were overall more popular than GENERAL MOTORS.
By vote balance, alternator VALEO surpassed GENERAL MOTORS:
By number of reviews, alternator VALEO surpassed GENERAL MOTORS:
In March 2026, according to PartReview, alternator VALEO led more car-specific ratings than GENERAL MOTORS:
VALEO are chosen by owners of cars such as: Ford Escape, and others.
Alternator GENERAL MOTORS have not yet taken leading positions in car-specific ratings. You can help by adding a review and specifying your car.
If this comparison didn’t fully answer your question, there are many others on PartReview.
For example, comparisons of alternator VALEO with: Denso, Bosch, Duralast, OEM Toyota, OEM Honda, OEM Volkswagen, AC DELCO, OEM FORD, OEM Audi, OEM Nissan.
Also available: comparisons of alternator GENERAL MOTORS with: Denso, Bosch, Duralast, OEM Toyota, OEM Honda, OEM Volkswagen, AC DELCO, OEM FORD, OEM Audi, OEM Nissan.
You can also see who is better among other alternator manufacturers: Bosch or Denso, Denso or Duralast, OEM Toyota or Denso, Bosch or Duralast, Denso or VALEO.
