Battery Question

NovaChris · 12-06-2020, 08:14 AM

Newbie question, getting close to pulling trigger on a great '17 after waiting too long again and missing out on yet another one.

My question is, are batteries really like 2k? I knew that maintenance would be pricey, but that seem excessive. How long do batteries last? Also, whats the best trickle charger since I won't be dailying this car.

Thanks in advance!

RoundelM3 · 12-06-2020, 08:27 AM

The F8x M3/M4 cars use a Lithium-Ion battery, which is much more expensive than a conventional battery. This type of battery is required due to a higher electrical demand for the M-Differential and (if your car has it) the M-DCT. The Lithium batteries generally last 6-8 years, and the cost to replace them at a dealership is in the $1.8-2K range. You can buy one for $1200-$1400, but few places will ship them, and replacing the battery and coding the Intelligent Battery System can cost around $200-$300. If you drive the car a few hours every week, no trickle charger is necessary.

NovaChris · 12-06-2020, 08:38 AM

Great, thank you! I had a feeling they lasted longer.

12-06-2020, 08:14 AM	#1
NovaChris Private First Class 205 Rep 182 Posts Drives: '23 M3 Join Date: Aug 2020 Location: Nova VA iTrader: (0) Garage List 2020 Ford Explorer [0.00]	Battery Question Newbie question, getting close to pulling trigger on a great '17 after waiting too long again and missing out on yet another one. My question is, are batteries really like 2k? I knew that maintenance would be pricey, but that seem excessive. How long do batteries last? Also, whats the best trickle charger since I won't be dailying this car. Thanks in advance!
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12-06-2020, 08:27 AM	#2
RoundelM3 Major General 1837 Rep 6,990 Posts Drives: 15 F80 M3, 22 G01 X3 30i Join Date: Apr 2010 Location: Clayton, NC iTrader: (2) Garage List 2022 BMW X3 [9.83] 2015 BMW M3 [6.50]	The F8x M3/M4 cars use a Lithium-Ion battery, which is much more expensive than a conventional battery. This type of battery is required due to a higher electrical demand for the M-Differential and (if your car has it) the M-DCT. The Lithium batteries generally last 6-8 years, and the cost to replace them at a dealership is in the $1.8-2K range. You can buy one for $1200-$1400, but few places will ship them, and replacing the battery and coding the Intelligent Battery System can cost around $200-$300. If you drive the car a few hours every week, no trickle charger is necessary. __________________ 2015 F80 ///M3 Sedan 7DCT Tanzanite, 2022 X3 sDrive30i 8AT Brooklyn Grey
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12-06-2020, 08:38 AM	#3
NovaChris Private First Class 205 Rep 182 Posts Drives: '23 M3 Join Date: Aug 2020 Location: Nova VA iTrader: (0) Garage List 2020 Ford Explorer [0.00]	Great, thank you! I had a feeling they lasted longer.
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