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Old 05-06-2008, 07:26 PM   #1 (permalink)
Join Date: May 2008
Car: 2001 M5 & 2005 525i
Posts: 4
cindysuecj is on a distinguished road
Question Battery change on 2005 525i

Need help on how to change the battery on our '05 525i. I know you go thru trunk, but then what? Step by step would really help! Also does this also apply to our '01 M5?
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Old 04-05-2009, 07:34 PM   #2 (permalink)
Join Date: Apr 2009
Location: Macon, GA
Car: 1986 BMW 325e
Posts: 22
FearsOfWar is on a distinguished road
Battery replacement is standard on every vehicle on the planet.

1) Remove negative/ground (black) cable.
2) Remove positive (red) cable.
3) Pull out battery.
4) Put in new battery.
5) Replace positive cable.
6) Replace negative cable.

As a general warning though, if you have aftermarket CD players with anti-theft & a reset code, you'll have to put that code in before it will work. They are designed to shut down until you put the code in, every time it loses connection to the battery.

Also, if you have an onboard computer (like my 86 325e), you'll have to reset the units of measurement & time.
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