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Old 01-23-2013, 11:17 AM
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vintage42 vintage42 is online now
BMW CCA 1405
Location: Louisville, KY
 
Join Date: Jun 2007
Posts: 1,646
Mein Auto: 1997 BMW Z3 1.9 5MT
Registration electronically mates the new battery to the car's charging system and can extend the life of the new battery by charging it more intelligently.
http://www.bimmerfest.com/forums/sho...gister+battery

However, registration is not cost effective if you must buy a new battery from the dealer that costs $350 including registration. Or if you buy a $150 Duralast from Autozone and must pay a dealer $140 to register it with your car's ECU.

It is cheaper to just buy the Duralast and replace it when it goes bad in 3 to 5 years. Like we have done for decades.
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