Owner reviews for alternator

I managed to get a reman Bosch 150a/140a last year from Advance Auto for around $190.

I just replaced the one in my daughter's Mk 4 with a rebuilt 120A Bosch one from Rock Auto last week.

I would go Bosch if I had the option. Mine went out on a road trip. I had to go with what option was available at the auto store I was able to limp to. Lucky there was one close by but it was who knows what brand. It was my only option so I bought it. Probably duralast or something but it’s working 2 years later.

I had a car get flooded for 6 months and the Bosh alternator still worked perfectly for another 21 years. Would buy again

Fcp euro has an 100amp bosch one that works well. They have a lifetime warranty too.

rebuilt my oem denso to avoid buying those other brands, they generally are very hit or miss and dont have a good warranty to back them up. denso all the way, i would buy one for my car if they were still available.

A bearing went in our original alternator so I replaced it with a Valeo brand and it's pretty loud when it clicks on. It is loud enough that I'm wondering if I got a bad alternator --or is this normal??

It's the typical whirl or whurr noise --it's silent, and then you can hear the whirl or whurr noise when the alternator clicks on. It seems mechanically and electrically fine: It's doing what it should be doing electrically (charging, correct voltage, the battery is happy, the car runs better with this new alternator, etc.). It's just loud.

Defective alternator. Get it exchanged under warranty. Unfortunately, lots of remanufactured alternators from parts stores don't perform up to spec. It would best to get a new or remanufactured from Hyundai or a reliable brand such as Denso.

When my alternator went out I got an aftermarket that failed within the week. Afterwards I was told that the element alternator is in a spot that gets more heat than a normal car so it needs a higher temp solder. I got the denso oem after and it’s still good after 5 years

I bought a Duralast for my ‘99 E55 a few years ago. It didn’t work so I pulled the rectifier off of it, put it on the original one, which put out at 14.2 v back in the car. I returned the Duralast one after I made the old rectifier look like new. The shaft rotation on the Duralast felt gritty, too.