then I installed an "American Battery", was a brand available in Venezuela some years ago, lasted 6 years, now I have a Delco, its been there for the remaining 4+ years. May be one of those suggested brands (not available here) would have lasted the hole 12 years!!

I would never pay an extra penny for a BMW dealer supplied battery. But always take good care it is a sealed one with venting port for the rear seat location.

Javier