[Rich807]

I generally split the difference on my German cars. I buy an OEM battery & put it in myself. What dealerships charge for this work (labor) is criminal IMO.

We can debate whether 'coding' / 'programming' is B.S. or not. I tend to believe, based on my experience, it's 95% B.S. But, since I always have a programmer in my stable anyway, I just go ahead & 'code' new batteries once I put them in. Buying something like BimmerCode/Link, ODBEleven (for VW/Audi stuff) etc, is so worth the little money they cost, having them is a complete no-brainer.

I haven't done a battery in an X2 but it looks like a little more PITA than what it should be (getting to the battery so you can physically swap it), but changing a battery out is a extremely low-tech process. If you have a normal set of tools & some time I'd do it myself. If you don't have those I'd find someone in my area that works on cars on the side (like folks from your local BMW community i.e. club etc), or failing that, I'd pay an indy shop to do the work. That's just me though.