Quote:
Originally Posted by jigaro
I have replaced my original BMW Battery with the aftermarket one, 100amp, which we import ourselves from South Korea, and never had a problem since, even in the freezing temps, starts no problem, when car not running i have all the electronics on and still no problem, the X acts like i never had this problem before.
I used to have dead battery at least 3-4 times a month, but now thank god this issue is gone!
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The car needs to be updated if you are switching to an AGM battery or vice versa. It's also recommended to register any new battery.
However, in the long run, its cheaper to just replace with an aftermarket battery than to go to the dealer, purchase a dealer battery, pay for them to register, just so my BMW battery might last a little longer becuase it was properly registered and perhaps has an updated "charging" profile for optimum efficiency.
I paid something like $90 for an autozone battery in my E60. It's been going strong for 18 months. At 4,5,600 dollars at the dealer, I could replace my battery on my dime every year and probably come out ahead. Plus, the Autozone battery has a 3+ or 4+ year warranty so if the battery dies, I just get a new one. It takes 10min to swap out.
I don't want this thread to turn into a "should I register or not" thread.
All I really wanted to know was the type of battery supplied with the E70's, AGM or mixed based on production date.