Battery OPTIMA or OEM BMW

Get an Optima Yellowtop 35 and be done with it, that's what I replaced my OEM battery with an loved it

Threw a redtop Optima in mine...3yr warranty...no issues

I put my optima in with no issues

I just upgraded to a yellow top optima n I'm one cable short on finishing the big three.

Great battery! I'm really happy with mine.

I have a red top, kicks ass, and would never get anything else..

Optimas are good batteries and they can be mounted in any position. They claim they're a spiracell acr blah blah battery and not a gel cell, but I think that's just marketing.

Don't assume the Optima is in good condition either. I love them, I have one in each car, but both my brother and I have bought RED and YELLOW tops that were bad from the store.

Optima is the most overrated battery brand on the planet (I'm not saying the WORST, but they are way too well-known for being a slightly-below-average product). They used to suck when they were gel cell (gel cells all suck) and their more recent AGM (AGM itself is good) batteries aren't great. Made by Johnson Controls, a not-great company, in Mexico.

My Optima Redtop 8003-151 34R that I purchased through amazon kicked the bucket and cannot be recharged. Do not buy Optima Batteries from Amazon since they will send you back to Optima and Optima will tell you that Amazon is not an Authorized dealer.