Alternator Bosch or Duralast

PartReview Score

Rank #2 in ranking

294

133

204

3.7

Lights

4.0

Noise

1.6

Warning light

3.1

Owners' choice:

PR Score

Ranking

Votes

Reviews

Average rating

Properties

Car

PartReview Score

Rank #18 in ranking

-24

2.6

Lights

2.6

Noise

1.6

Warning light

2.2

No data

Reviews

All

Bosch

Duralast

Bosch › Alternator

Compy486 24 Jan 2026, 23:17

Warning light:
Lights:

Rating 4.0

I just had to swap my alternator today on my MK7. Mine was Valeo but I could only find a Bosch locally, I decided to give it a shot and it worked just fine. Just a PSA for anyone in the same situation, they are both the same barring a slightly different orientation of the plug on the back.

Pros: worked just fine, compatible

Vehicle: Volkswagen Golf

Bosch › Alternator

iforgotmylogin32 29 Dec 2025, 02:30

Rating 4.0

I am currently leaning towards picking up a new Bosch 120 amp over the BMW.

Vehicle: BMW

Bosch › Alternator

Eric D 25 Dec 2025, 04:28

Rating 5.0

In place of the Valeo alternator I installed a Bosch VR6 120 amp alternator with a Bosch ABA alternator pulley (its 5 ribs versus 6 ribs of the VR6).

Pros: increased amperage

Bosch › Alternator

Gold-Consequence1750 16 Dec 2025, 19:22

Rating 4.0

I just went over 195,000 miles while I've driven it over 26,000 miles this year with the only failures being the original 15 year old Bosch alternator and the spark plugs needing to be replaced.

Pros: motor itself is reliable

Cons: alternator needed replacement

Vehicle: Volkswagen Jetta

Mileage: 313821 km

Bosch › Alternator

I_compleat_me 14 Dec 2025, 18:47

Rating 5.0

I bought the Rock Auto Denso (really a Bosch rebuild) and am happy.

Pros: user is happy

Bosch › Alternator

Brent42088 2 Dec 2025, 17:32

Rating 3.0

I've been looking on RockAuto. Will a Bosch remanufactured or AC Delco remanufactured work ok?

Bosch › Alternator

Last_Seesaw5886 9 Nov 2025, 16:09

Noise:

Rating 3.0

I tried a Bosch reman from Rockauto on my Civic. Lasted about two years then the rear bearing starting squeaking.

Pros: lasted about two years

Cons: rear bearing squeaking

Vehicle: Honda Civic

Bosch › Alternator

Former-Primary-3186 21 Dec 2025, 04:49

Warning light:

Rating 1.0

Literally just put a FCP Bosch remanufactured 2 pin alternator in our 530 last week--it doesn't work at all. Communicating with FCP currently to send it back and get a replacement, but I'm not happy about it. I was told that Bosch was the one to go with for best quality, but now I'm skeptical.

Cons: doesn't work at all

Vehicle: BMW

Bosch › Alternator

Ok-Window-5847 9 Dec 2025, 12:42

Noise:

Rating 1.0

the bosch alternators are junk. I had to warranty mine through fcp 3 times for the exact same bs: loud ass whining noise and over volting immediately after instal. Cheap chinese junk.

Cons: loud whining noise, over volting

Duralast › Alternator

donman1990 18 Nov 2025, 03:26

Warning light:

Rating 0.5

Got a remanufactures duralast alternator. Worked for about a week and the died.

Cons: died quickly, short lifespan

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Show all

Which alternator to choose — Bosch or Duralast?

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:

Comparison of alternator Bosch and Duralast

PR Score.
Overall ranking.
Vote balance.
Average rating.
Number of reviews.
Feature ratings.
Car owners’ choice.

Which alternator are better — Duralast or Bosch?

In March 2026 on PartReview, alternator Bosch were overall better than Duralast.

Bosch received a PR Score of 72 out of 100, and Duralast scored 43 points.
Bosch ranked 2 in the overall ranking, and Duralast ranked 18.
The average rating is higher for Bosch (3.7) than for Duralast (2.6).
Alternator Bosch have better feature ratings than Duralast:
- Noise - owners believe, that by this property Bosch does not differ from Duralast.
- Lights - drivers claim, that this property for Bosch is outperforms Duralast.
- Warning light - reviews suggest, that this property for Bosch is preferred to Duralast.

Which alternator are more popular — Bosch or Duralast?

In March 2026 on PartReview, alternator Bosch were overall more popular than Duralast.

By vote balance, alternator Bosch surpassed Duralast:

For Bosch, the ratio of positive (471) to negative (177) votes is 294 votes.
For Duralast, the ratio of positive (74) to negative (98) votes is -24 votes.

By number of reviews, alternator Bosch surpassed Duralast:

For alternator Bosch there are 204 reviews: 133 positive, 36 neutral, 35 negative.
For alternator Duralast there are 54 reviews: 18 positive, 10 neutral, 26 negative.

Which alternator do car owners prefer — Bosch or Duralast?

In March 2026, according to PartReview, alternator Bosch led more car-specific ratings than Duralast:

Bosch are chosen by owners of cars such as: BMW X5, Ford Focus, Volkswagen Golf, Volkswagen Jetta, Volkswagen Passat, and others.

Alternator Duralast have not yet taken leading positions in car-specific ratings. You can help by adding a review and specifying your car.

Other comparisons of alternator

If this comparison didn’t fully answer your question, there are many others on PartReview.

For example, comparisons of alternator Bosch with: Denso, OEM Toyota, VALEO, OEM Honda, OEM Volkswagen, AC DELCO, OEM FORD, OEM Audi, OEM Nissan, Motorcraft.

Also available: comparisons of alternator Duralast with: Denso, OEM Toyota, VALEO, 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, Denso or VALEO, OEM Honda or Denso.