You need one specifically made for your vehicle, but you can shop around on different sites, for different brands to find one that meets your budget. I prefer ones from the OEM (ie Honda), Bosch, or Denso.
Pros: different brands available
Owner reviews for alternator
Manufacturers
Comparisons
Lucky for us, the Alternator was in fact faulty (it was a Bosch btw) and that the previous owner replaced it a few months prior, meaning it was still under warranty.
Pros: under warranty, faulty alternator
Cons: insanely low voltage output
Vehicle:
Mercedes
Bosch is a great aftermarket option.
Pros: great aftermarket option
Maybe examine the old alternator, see if you and a multimeter can determine why it failed. I went to the autostore to replace the alternator on my Jeep, $219! I took mine apart, did a few simple checks and found the problem was just dirt in the brushes. I fixed it with a toothbrush!
Pros: fixed with a toothbrush
Cons: bolts were corroded
Vehicle:
Jeep
Yes, if it was from an OEM supplier to Lexus or the auto industry, such as Denso (1/3 owned by Toyota/Lexus), AC Delco, or Bosch, but I would not buy a mystery brand, especially not a rebuilt, because I don't know how much they get rebuilt or tested.
Cons: mystery brand, rebuilt
Vehicle:
Lexus
Changed it for another OEM Bosch new (not reman). Subsequent test showed it was now good.
Pros: test showed good
Vehicle:
Volkswagen Jetta
Mileage: 137000 km
Hi all, after a long time, the problem solved by instaling a non refurbished Valeo alternator. Same one as the refurbished was.
Pros: problem solved
Cons: refurbished one failed
Vehicle:
Volkswagen Golf
I wasn't crazy with the AC Delco (GM) alternator conversion when I used it on my MGB engine. The Bosch ones seemed to be a little better designed and easier to convert, plus they looked simmilar to the Lucas ones.
Pros: better designed, easier convert
Cons: wasn't crazy with AC Delco
Vehicle:
MG MGB
Upon only 3 days of ownership, the alternator went out due to the battery going bad, that took out the internal voltage regulator.
Cons: alternator went out
Vehicle:
Volkswagen Passat B5
Mileage: 144844 km
In the process of replacing the alternator..it was bad.
Cons: alternator was bad
Vehicle:
Volkswagen Passat
Mileage: 130000 km
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