Battery Exide or OEM BMW

BMWs are super good on batteries. They seem to last 9 years or more even in the midwest with extreme cold.

I got a full ten years on mine. 2012 F30 320d that i've had from new, now got 85k miles.

Bmw e91 318d del 2009, cambiata la batteria originale quest' anno.

low miles 10 yr old vehicle means its possible it has the original BMW factory installed battery. Some of those can last 10 years, I had a 2013 bmw 3 series and in 2022, I finally changed the original battery.

The OEM battery is AGM. If it was an OEM battery it wouldn't be lead acid, at least here in the US. Not sure what you're talking about. I installed mine three years ago and have had no issues despite winters that range from below 0 to summers that reach 100. Fahrenheit obviously.

Got a new Exide battery at our expense outside. Car is fine ever since then.

Just replaced battery as EV had stopped working, and the battery dealer said it was. Good battery for hyrbids (Exide X40DPMF)

I had 8 years on original battery on 2017 750i. I replaced it. It was barely holding 12V. Few functions were not working like stop/start and such.

However if you bought an Exide battery, 100% it's your issue: I have had three batteries replaced under warranty on my BMW until I said "basta" and bought a Yuasa out of pocket. The amount of weird issues those junky batteries caused was beyond belief.

The Exide extreme duty is showing signs of age, it's entirely possible I'll limp it through the next 4 weeks or so and it will get to next winter. It is a 4 litre NA diesel so start demands are pretty high when cold and with the glow plugs.

It 4 years old well past it's warranty period but frankly I'm a little disappointed with it, mainly as the battery is well over and above what the vehicle specifies, it gets regular two hour highway runs (twice a week) and very few short trips.