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.
Fords can be really picky about which alternator you use! Even if it’s a remanufactured Motorcraft, it’s worth it. Had a friend with an 11 Edge 3.5 that we put a aftermarket alternator in and it complained errors etc… for months till we finally swapped it out and it worked fine with the Ford part!
I just replaced mine with a motorcraft one from rock auto. Yeah it's pricier than reman or other brands but if it lasted 20 years and 190k, I figured that this would last just as long. Get what you pay for
I went through 3, iirc on my 2006 mustang. Wound up with a used motorcraft (OEM) that I bought off eBay.
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 had Valeo in my other car, very common for Bosche to overcharge.
I did see something recently where an aftermarket alternator made by Valeo had the same part number as the Original Toyota part, but in fact had another software part number that made it through an error and not work properly.
Mesmo um Valeo novo está caríssimo, pede mais orçamentos.
Alternator is my wild guess: Valeo alternators have long sucked, kinda like their starter motors.
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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 Motorcraft and VALEO were roughly equal.
In March 2026 on PartReview, alternator VALEO were overall more popular than Motorcraft.
By vote balance, alternator VALEO surpassed Motorcraft:
By number of reviews, alternator VALEO surpassed Motorcraft:
In March 2026, according to PartReview, these manufacturers led the same number of car-specific ratings:
VALEO are chosen by owners of cars such as: Ford Escape, and others.
Motorcraft are chosen by owners of cars such as: Ford Mustang, and others.
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 Motorcraft 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.
