Thread: Optima Battery?
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Old 02-17-2010, 02:22 AM
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Hey this is great info. How do you access the BMW Diagnostics Menu to read the battery voltage?


Quote:
Originally Posted by we350z View Post
I went with the bosch for $108 bones. Dropped right in, works great.

Multimeter reads about 12.5V engine off, 14V engine on. BMW Diagnostics Menu reads ~13.7V and no problems with codes.

I put a little dialectric grease on the terminals since the old batt had a tiny bit of corrosion on it (amazing since battery is INSIDE the vehicle).
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