Here's a good question: My 2001 E39's original battery finally developed a bad cell. I am looking for a replacement and would like some input from those that have replaced their battery...
with an aftermarket version. The OEM is produced by Exide, which chiefly produces semi-truck batteries and a
handful available at BJ's Wholesale. I would love to use Optima, however, the fitment for a Bimmer ends with the '77
2002. Any thoughts or suggestion?