my x5 is not starting after like 5 min of sitting in it with it not being on. Living in Colorado I would like some serious cold cranking amps. I want an optima battery, but they are not made specificaly for our cars. Which one do I need to get? If nothing else what is the battery model number of the generic own replacement and where do I get it.
This all started happening when I changed the light bulb on the rear drivers side. Any connection possible? As always THANKS!!