What's the life of the stock Audi batteries?

[fignewton]

My 2018 will be 6 years old this month. Wondering if I should replace the battery as a preventive measure. How long do these things normally last? I know on other cars and trucks I've had, 5 years was about the average before having to replace them.

[Whinny SQ5]

We had the OEM battery in our S5 for a bit over 8 years before it suddenly died. If you have OBD11 (and I think other scan tools), you can check the state of the battery and get an idea of where it's at.

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[RMode]

It’s often a function of how it’s used. Lots of highway, or lots of on/off (which is harder on the battery), spending time outside, etc. For example, on my B7 S4, bought new in 08, I’m on battery #3, and 174k. But on my B5 S4, the battery lasted 3.5 years, but 71k miles - given the miles, and the inexpensive nature of the battery, I was fine with that. My B9 S4 is now at 5 years old this week, but not even at 4K miles. It mainly spends time inside, with the battery just disconnected. I suspect it will need a battery done in the next 12 months or so.


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[scottyuk]

My 2010 A4 2.0T needed a new one after 12 years. Lots of town work so start/stop but only 60k miles

[Gunnarrrrr]

8 years is usually a pretty good run, at least for the OEM batteries. even a nice aftermarket battery like an interstate or whatever, I'm lucky to ever get 4 years. I stick to the oem dealership batteries now.

[fusion3214]

maybe its a placebo, but ive noticed that my battery life significantly went down once i disabled their smart battery charging by unplugging the module on the negative terminal. debating on running some lithium on the next audi.

[TheContrarian]

Going 5.5 years on my RS3 and 4.5 on SQ5. No sign either battery is low.

[Whinny SQ5]

8 years is usually a pretty good run, at least for the OEM batteries. even a nice aftermarket battery like an interstate or whatever, I'm lucky to ever get 4 years. I stick to the oem dealership batteries now.

Very true. We got about 8 years out of the SQ5 battery as well, but we changed it as more of a precaution. We were going on a cross country trip and didn't want a battery to leave us stranded. The battery in our NB2 Miata is an O'Reilly branded one, and we already had to replace it once within 3 years.

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[Smac770]

The answer will vary a lot. Driving profile will be person specific but the most important. And comparing vehicles that use stop/start a lot vs those that don't even have the feature will vary widely. As well as if it's a standard tech (not in stop/start vehicles) or AGM tech battery. My MY09 2.0T AGM lasted 12 years, and wasn't changed because it went bad. Changed it while trying to chase down a charging system issue (turned out to be excess voltage drop in the cable from the alternator).