New Z owner here, I picked her up on Sunday and then on Monday got the 'very low battery' warning light 
After checking the alternator was working ok and finding the manufactured date on the still original BMW battery was 06/10 I've decided it's time to do what the previous owner didn't! I'll be collecting a Varta E39 for £125 from my local battery store at the weekend and looking for the cheapest way to register it properly (never had to do this on my other cars!).
I'm also planning on doing some basic coding and looks like the Carista adapter £15.99 and the bimmer-tool Android app £13.49 will do everything I need. Has anyone used this app to succesfully register a new battery?
I was considering going down the Carly route instead but apart from being more expensive I've read a thread on another forum saying the Carly app is unreliable at actually doing the battery registration.
Cheers

After checking the alternator was working ok and finding the manufactured date on the still original BMW battery was 06/10 I've decided it's time to do what the previous owner didn't! I'll be collecting a Varta E39 for £125 from my local battery store at the weekend and looking for the cheapest way to register it properly (never had to do this on my other cars!).
I'm also planning on doing some basic coding and looks like the Carista adapter £15.99 and the bimmer-tool Android app £13.49 will do everything I need. Has anyone used this app to succesfully register a new battery?
I was considering going down the Carly route instead but apart from being more expensive I've read a thread on another forum saying the Carly app is unreliable at actually doing the battery registration.
Cheers