Alternator OEM Audi or VALEO

Both Valeo and Bosch are good brands. I’ve never owned a Mercedes, but both Valeo/Bosch are installed in various BMWs from the factory.

I had my alternator go out on me at 165,000 KM on my audi S3 2015, got a rebuild for half the price of a brand new one and since it's a rebuild the warranty on it is for 2 years. Paid roughly 500 bucks and 100 for labor.

I had to buy a replacement remanufactured alternator (Valeo 120A one) and it was a straight replacement that solved the problem.

Just got mine done today. I purchased the car used and was in with Audi chat trying to get the window sticker. They let me know the car had open service action and was for the alternator. Dropped it off and got it back the same day.

It’s your alternator not the battery, the coding of the battery is important, but will only extend the life battery will not cause it to be dead in three days

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.

Rs6 definitely has an alternator issue. I’m currently at 25k on oem alternator.

My Q8 alternator died today. 3 year old car 36k miles on the clock. Luckily I was right next an Audi dealership with a garage when the display panel told me to stop driving and pull over safely. When the mechanics got to the car they couldn\u2019t even start it.

The indy shop I used diagnosed it as a bad alternator; I am so lucky ( s a r c a s m ) to have the Valeo (mega $$$$$) unit, they swapped it out a week later.

The alternator was replaced, car died again two weeks later. The Valeo OEM was deemed defective. Back in the shop for a warranty change, still getting voltage fluctuations.