Quote:
Originally Posted by DanG
Remember that you need to code the new battery. You can’t just replace it.
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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.