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05-05-2026LAST POST
PAM3Guy wrote
Besides registering, are there any other reset procedures that need to be done when changing the battery? TIS makes it seem like there are some re-learning procedures that need to be done (auto engine start/stop, mount steering angle, etc.):

https://www.newtis.info/tisv2/a/en/e92-m3-cou_201202/repair-manuals/12-engine-electrical-system/12-00-engine-electrical-system/2S8T2Cv

Is it Ok to attach a trickle charger (like a CTEK) to the electrical leads under the hood to keep the settings while changing the battery?
yes i do believe when the new date is entered , the car understands its dealimg witha full deck so to speak and will draw power differently making it more effficient and long lasting , adjusting from the old battery in whuch yiur car was under performing do to its inadequTE TAYLORED SUPPLY>

SECONDLY , IT IS A FANTASTIK IDEA TO ATTACH A TRICKLE CHARGER WHILE YOI CHANGE BATTERIES SO YOU DONT LOSE ALOT ON PRESETS YOU HAVE SET IN YOUR CAR ALRADY.
presarielmora@gmail.com wrote
yes
No, Calrly has been proven to not properly register new batteries on this car. Unless this has changed in the last 4 years, find some other means of registering the battery. It may code the battery, but fails to register. Shown many times on this forum.