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Old January 3rd, 2018, 07:10   #6
Veteran Member
Join Date: Aug 2006
Location: Lexington, VA

Here’s a very well researched thread on upgrading the battery.

Looks like some changes are required with VCDS for the car to accept and manage the new/different battery properly. The computer/alternator must charge differently for different types and sizes of battery?

Perhaps just for cars with Battery Control Modules, BCM, which comes as part of stop and start feature
05 Jetta wagon, 15 Golf wagon

Last edited by Grigg3; March 17th, 2018 at 11:20. Reason: more info
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