[IndyRed128i]

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My 2022 BMW now has 15K miles with the original battery.

Curious to see if anyone else has had to replace their battery yet, and if so, at what age, mileage.

[MMnut]

My wife's 2019 hits 80k km and still going strong, mine 2021 with 20k km and all good.

[jefe2000]

I changed the original battery in my 2018 (January production month) M2 in late 2025. And when I changed it, it wasn’t showing any signs of age except some low’ish voltage on the ol’ voltmeter after sitting for a few days. So, I got nearly 8 years on the battery that the car came with and possibly could’ve gotten more.

[ctcarbonari]

2015 535i M-Sport

Replaced original battery (105 Ah H9) @ 10 years / 90k miles.
Battery was testing at 850+ cca, resting charge ~ 12.4V+, and was just starting to consistenly have state of charge readings in the 70-80% range (was nearly always 80%+ during my ownership)

Never any issues. I just couldn't take it any more and had to swap it out before the winter season set in.

Battery longevity is a testament to BMW's IBS & their system charging algorithms.

[Gossypiboma]

18' M3 cs, 18' X5M and 13' M3 on original batteries. A 22' MY should be good for awhile longer.

[QUiKSR20]

I sold my 2013 328i in 2024 w/ 115k miles and it still had original battery and car lived outside.. Stock battery's seem to be good for 10 years more or less which is pretty damn awesome.

[No one]

It depends on the usage/maintenance pattern. Regular (often) long enough trips on reasonably (warm engine ) high revs. Or regular/appropriate charging from a wall socket. Warm storage. Good technology.

My 2013 AGM is still holding on. Despite outside storage and occasional frosty winter days (I had to make a few deliberate long winter trips throughout the years to charge the battery on an occasional "low charge" warning). Modern cars have a different technology batteries AFAIK, but have no doubt the car's computer is watching and it will tell you when it's the time (to charge or replace).

[DanG]

I changed mine after 7 years. BMW lives outside and does a lot of small trips.

[slilley]

I bought a battery tester a year ago and have been happy with it:

https://www.amazon.com/dp/B07Z67MMGC...d_asin_title_8

I knew from testing the battery in my daughter's 2020 X1 last September that it would likely need to be replaced this year, but when I checked it this weekend while doing some other maintenance (bleeding brakes), it said the health was down to just 16% and should be replaced. So I got a new battery from Autozone, and that battery tested at 100% right off the shelf.

Before I got the battery tester, I'd relied on the free testing they do at the auto parts store, but with five cars in the family fleet - it's nice just to be able to grab my tester and check the battery health while I'm doing an oil change.

[Emily172013]

Changed mine after 6yrs for piece of mind. Mainly use car for longer trips. Had one die 700 miles from home. Luckily a NAPA was next door to the restaurant.
I'm planning on keeping the car for some time, but not another 6yrs, so made sense to me to just change it before any surprises.

[DanG]

Originally Posted by slilley

I bought a battery tester a year ago and have been happy with it:

https://www.amazon.com/dp/B07Z67MMGC...d_asin_title_8

I knew from testing the battery in my daughter's 2020 X1 last September that it would likely need to be replaced this year, but when I checked it this weekend while doing some other maintenance (bleeding brakes), it said the health was down to just 16% and should be replaced. So I got a new battery from Autozone, and that battery tested at 100% right off the shelf.

Before I got the battery tester, I'd relied on the free testing they do at the auto parts store, but with five cars in the family fleet - it's nice just to be able to grab my tester and check the battery health while I'm doing an oil change.

Remember that you need to code the new battery. You can’t just replace it.

[slilley]

Originally Posted by DanG

Remember that you need to code the new battery. You can’t just replace it.

Yep, I registered new battery with the BimmerLink app and an OBDLink MX+ plugged into the OBD2 port. Super easy!

However, I'd be remiss in mentioning that I believe the whole coding of 12V batteries for ICE vehicles is mostly bunk - and I'm an electrical engineer (BSEE). I suspect the difference in battery lifespan for a typical 12V battery in a vehicle that's been coded after replacement and one that's simply been swapped (without coding) is probably two or three months at most. So, instead of getting 5 years and 6 months from a battery that was properly coded, you may only get 5 years and 3 months from a battery that's not been coded in the vehicle. Across a million cars, yes, that's a huge difference. But as an individual, it's probably not the difference of making it through an additional winter. So, I've never lost any sleep in cases where I was unable to code a new battery when replacing it. Now if we are talking about batteries in an EV, or even the 48V battery in the X5's hybrid system, that's a totally different discussion and you definitely need to let the car know it's got a new battery.

Thankfully, the tools to code for battery replacement are common now (even the auto part stores will do it for you), so there's no good reason not to do it.

[SharpAndCunning]

2014 BMW X1. Replaced my battery in November of 2025. I thought it was a battery problem, but it was a ground strap issue. Battery is still good, but I had already bought and installed the new one.

[Scionti95]

Changed both batteries on my 2020 M850 GC at year six. Am a senior driver and did not want any surprises. Piece of mind.

[fiveightandten]

They’ll go between 7 and 10 years depending on climate and use.

[jkoral]

Originally Posted by slilley

I suspect the difference in battery lifespan for a typical 12V battery in a vehicle that's been coded after replacement and one that's simply been swapped (without coding) is probably two or three months at most. So, instead of getting 5 years and 6 months from a battery that was properly coded, you may only get 5 years and 3 months from a battery that's not been coded in the vehicle.

Perhaps, but in my experience I'm getting 10+ years on BMW batteries.

Last BMW, 10 years before car was totaled. Battery was still healthy.
Current BMW, 9 years and counting on original battery.

This is in New England climate, car sits in unheated garage.

My kids cars (3 Mazdas) seem to require one every 5 years or so.

[jefe2000]

Originally Posted by jkoral

Perhaps, but in my experience I'm getting 10+ years on BMW batteries.
Last BMW, 10 years before car was totaled. Battery was still healthy.
Current BMW, 9 years and counting on original battery.

Yeah, I replaced mine at 8 years out of an abundance of caution. I expect it would’ve gone to year 9 (and maybe beyond) with no problem.

Originally Posted by jkoral

My kids cars (3 Mazdas) seem to require one every 5 years or so.

Indeed! We’re lucky to make it to 4 years on the battery in our ‘16 Subaru Forester XT. They go quick in that vehicle.

[John in VA]

2015 228i, 62k miles, original battery.

[CSBM5]

Originally Posted by slilley

Yep, I registered new battery with the BimmerLink app and an OBDLink MX+ plugged into the OBD2 port. Super easy!

However, I'd be remiss in mentioning that I believe the whole coding of 12V batteries for ICE vehicles is mostly bunk - and I'm an electrical engineer (BSEE). I suspect the difference in battery lifespan for a typical 12V battery in a vehicle that's been coded after replacement and one that's simply been swapped (without coding) is probably two or three months at most. So, instead of getting 5 years and 6 months from a battery that was properly coded, you may only get 5 years and 3 months from a battery that's not been coded in the vehicle. Across a million cars, yes, that's a huge difference. But as an individual, it's probably not the difference of making it through an additional winter. So, I've never lost any sleep in cases where I was unable to code a new battery when replacing it. Now if we are talking about batteries in an EV, or even the 48V battery in the X5's hybrid system, that's a totally different discussion and you definitely need to let the car know it's got a new battery.

Thankfully, the tools to code for battery replacement are common now (even the auto part stores will do it for you), so there's no good reason not to do it.

I would tend to agree with you here. On my E91 that I owned for 9 years (bought in 2016), I replaced the battery in 2018 and registered it using Carly. It was still working fine when I sold the car in 2025.

I mention this since Carly circa that time period would allow you to code the battery size and also register/reset the charging profile. However, even though it indicated it performed the reset, it didn't. Net is that battery worked fine for the following 7 years before I sold it (still working fine) with the charging profile apparently never reset the whole time. As a side note, it was a 3rd/4th car so it lived outside most of that time too.

I long ago switched to BimmerLink and BimmerCode btw.

As to the content of this thread, my 2019 M2C is still on the original battery. I bought it new in Sep 2018, so coming up on 8 years this September. It has been garaged 24/7 since new and sometimes spends time on a CTEK though.

[BobsM3Coupe]

Originally Posted by jkoral

Perhaps, but in my experience I'm getting 10+ years on BMW batteries.

Last BMW, 10 years before car was totaled. Battery was still healthy.
Current BMW, 9 years and counting on original battery.

This is in New England climate, car sits in unheated garage.

My kids cars (3 Mazdas) seem to require one every 5 years or so.

Do you occasionally use a smart battery charger?

[No one]

Originally Posted by BobsM3Coupe

Do you occasionally use a smart battery charger?

Every time actually: it's integrated into the car.

[fe7565]

My original battery that came with my 2012 car was replaced after 11 years and 100K miles. And even then I realized that it wasn't the battery that was bad.