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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.
2004 Limited with 310000 miles alternator went out so went to local service shop . They were able to get it in and repaired next morning other shops in the area are a week backlog.Parts we're 310.00 (Duralast alt.and Gates belt)
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.
Got a remanufactures duralast alternator. Worked for about a week and the died.
Reman alternator quality is in the toilet. Not uncommon to have to warranty an alternator once or twice.
I started having problems like my alternator was going bad again so I replaced it with a duralast alternator part number DL2618-6-11 because I had a lifetime warranty on it and it still didn't fix it so I was thinking it may be a wire shorting out was playing around with the wires that go to the alternator and the plug on the back that goes from the alternator to the PCM and it's started charging again ( I guess it finally connected the electricity) so I replaced the plug on the back of the alternator. It fixed it work for about a month then it happen again check charging system battery light on and battery going dead so I was done. I took it to the Ford place they wanted to replace the other side of the PCM to alternator connector which they did and the alternator so I got another AutoZone lifetime warranty alternator and when they did that they said everything is charging and running like it is supposed to be but your PCM is still throwing the battery light and check charging system because your alternator is charging at 14v and for the PCM to cut the light off it needs to be at 14.6 v. So they wanted to put another alternator on it because they said the alternator from autozone the voltage regulator wouldn't let it go to 14.6 volts. The car runs and drives and doesn't have any problems I just hate the light being on to be honest I have spent hours on the Internet trying to see if it's just these AutoZone alternators that aren't letting it get to the volts the PCM wants or not haven't found anything.
Duralast are shit alternator. See it time and time again people buy them and have more problems afterwards.
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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 Duralast.
Alternator VALEO and Duralast were equally popular according to data in March 2026.
By vote balance, alternator VALEO surpassed Duralast:
By number of reviews, alternator Duralast surpassed VALEO:
In March 2026, according to PartReview, alternator VALEO led more car-specific ratings than Duralast:
VALEO are chosen by owners of cars such as: Ford Escape, and others.
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For example, comparisons of alternator VALEO with: Denso, Bosch, OEM Toyota, OEM Honda, OEM Volkswagen, AC DELCO, OEM FORD, OEM Audi, OEM Nissan, Motorcraft.
Also available: comparisons of alternator Duralast with: Denso, Bosch, OEM Toyota, OEM Honda, OEM Volkswagen, AC DELCO, OEM FORD, OEM Audi, OEM Nissan, Motorcraft.
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.