I've had good luck with Bosch (made by Varta iirc) and Yuasa.
Can confirm, worked at a battery store for a few years throughout college. Audis for some reason always lasted much longer than any other car brand.
My S4 battery is going on 6 years and it pops off like a brand new battery in Minnesota weather.
Change the battery to a bosch one, I had this issue and my car does 600 miles a week for work took it to toyota and they just kept charging it then giving it back to die again the next Monday morning, they tried to say I wasn't driving it enough until they pulled up the service history (2020 with 54k miles) but they still wouldn't agree to replacing the battery
I use a Group 27 battery in my Mustang and have found Bosch to work very well for me.
Put a new Bosch AGM in.
Probably the easiest car to swap a battery on imo. Just remove and replace, negative off first. Bosch is good quality, but not required...Use 80Ah 12V.
Sounds about right for a dealership, just had my battery replaced at a euro shop and it was 448 total
New battery fitted and all ok for about 2 months, then same problem. Took new battery out (AGM Bosch S5 A08) and charged it on the bench, left it there overnight. Next morning its reading 12.2v.
I switched to Bosch after that. that failed after 2.5 years, just under warranty. so it can happen with any company. some batches might have good quality some do not.
My experience: Stay away from Bosch.
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