Battery OPTIMA or OEM BMW

I just pick one up from the junk yard for $15 and they offer a 30 day warranty. You can find a nice optima used for around $60-$80 in this area

i've got the yellow top, installed from the previous owner. it doesn't fit my battery cover too well, but boy does the yellowtop have plenty of CCAs, my start is much stronger than my friend's .:R32 (battery from dealer).

I just have a red top Optima in there. It is the only batteries I'll buy after the one in my truck went through so much hell and survived many years of abuse.

Mine fit like a glove - no mods - no custom bracket - OEM battery cover fits perfectly.

If you want a great battery get an optima, other than that it's pretty much all the same to me.

Ive had my red top for 5 years no problems...

I've been using a blue optima for about 6 years now and still going strong... Yes yes I know its for marine applications

I liked my old optima. lasted 7 years. I've heard the new ones are Interstate brand now and are no good. I will not buy again based on what I've been hearing. too bad.

I had the yellow top in my 97 and It was nothing but problems, I know that doesnt help you answer your questions... Just saying

They are not worth the money, I work at a local auto parts store and have Two Red Top Batteries sitting on my battery pallet waiting to be shipping out and recycled. If that Red top wasn't made in Colorado, it's junk.