I've had to help the guy at Autozone in the past, so it's not for everyone. That said, all you need is a 10mm socket to loosen 5 fasteners. The hardest part is getting the plastic cover off.

 

Like checking the oil level!

 

Like doing whaaaat???

 

what? There's oil? Crap! One more thing to do... ������

 

FYI, the Interstate Megatron II MT-47/H5 All Season with 5 year warranty ($113) is an exact fit battery for R56 Cooper S. (2008 in my case). I got mine at an independent parts shop. (I dont believe they sell size 47 at Costco)

Its a little longer, but same width, has the vent holes on both sides (dont forget to transfer the black vent plug from old battery to driver side of new battery) and little notches to fit into the fastening bracket.

 

If anyone in NYC/Northern NJ area wants me to change their battery type and/or register their new battery, PM me. I can do it for 20 bucks. I live near Giants Stadium. I bought the Carly for BMW app yesterday and registered my new battery. Everything seems to work great so far. For anyone that wants to get their own, The app and adapter cost me about $135 total. I would like to recoup what I paid. Depending if you need fault codes reset, It takes about 15-20 mins to do everything. My battery died so a bunch of fault codes showed up as Low Voltage. I had 21 fault codes due to the old battery dying and I reset everything. If there's 10 guys that want to meet up, I can do it for 10 bucks. I'm not trying to make a profit, just get back what I paid.

 

I didnt need to register the new battery. I just removed and replaced.