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
Mine turned out to be a 60/90A by Valeo, replaced it with an OEM 100A BOSCH refurbisged one for like... 150 bucks, send in the old one and got fiddy bucks back. Was for sure a pretty colid upgrade and You even feel a difference in the Performance.
*Hella* is €216 to €380, *Bosch* is €212 to €432. Location: Germany, "*autodoc"* website
I've got the flickering lights so I'm going between the Denso reman and Bosch reman. Looks like the Bosch reman is done in house and the germans have pretty good engineering imo.
I recently replaced my alternator on one car w/a new Bosch unit. Cost about $200 and took me a couple of hours. Dealer cost just for the part was $700 and with book time they priced it out at over $1,400.
Bosch Alternators have 2 posts on them, the big one is for main battery ground, the smaller one is for the exciter or blue wire. When the cars ignition switch is turned on, the Dash light (led and diode) applies 12V+ to the coils to excite them, so the alternator can produce a charge. When the Alternator is producing current and voltage it goes to 13.5-14Volts.
Looks very similar to a Porsche 944 alternator.
I own the exact car, when I bought it, it came with a bad replacement alternator. The replacement was an eBay brand which was causing all sorts of faults. I replaced it with a Bosch unit and the car seemed fine. A few weeks after the replacement, I started getting a random limp mode with various under and over voltage errors. At this point I decided to buy and install a BMW branded alternator. This took care of issue.
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.
Mine failed at 55k a couple of weeks ago. A couple months prior to this I had complained to the dealership and showed them all the reports of this issue online... At the time they denied any knowledge of the alternator issue.
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