5-Series (E12,E28, E34, E39, E60)Chat relating to the BMW 5-Series of all generations. Specific models include: BMW 518, BMW 520, BMW 520i, BMW 530i, BMW 528i, BMW 530i, BMW 518i, BMW 524d, BMW 525i, BMW 525e, BMW 528e, BMW 540i, BMW 535i, BMW 520d, BMW 525td, BMW 525d, BMW 530d, BMW 525i/xi, BMW 530i/xi. (BMW 5-Series Forum)
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The question you have to answer is how lucky do you feel. The recommended gel batteries are more expensive then the standard acid based. I had a BMW tech state that since the thing is in a confined space there is a potential for it to explode if I put a standard battery in it. Don't know. Trust the tech. Used the expensive battery but your choice may be different. I could have been conned.
I changed out what looked to be the original Gel battery in my car which was just short of 11 years old. So it may be worth getting the good one if you plan to keep the car for any length of time.
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