1 Rechargeable Batteries Remote Key Fob VL2020 Compatible with and Fit for BMW – 90 Degree – MPN KR55WK49147

This battery fits an E90/91 recharagble fob, circa 2007-2013, ish.It works. It must be soldered in. You will have to split your case. You can buy replacement cases, rather that try to save your old case.FWIW, I wrote a very extensive review of how to do all the steps, but Amazon wouldn’t accept it for some reason.I’m not rewriting it. My review is this. This battery fits and works. Amazon customers can figure out for yourself how to do the install, or ask Amazon to post my original thorough and annotated review of all steps associated with battery replacement.Five stars – no issues.