After doing alot of searching in this forum apperently there is only 1 alternative battery ! BMW made it super difficult. C. Cgm3e46 Discussion starter. 43 posts · Joined 2011. #7 · Jun 14, 2022. So new update I bought a battery from BMW to my shock it wasn't as expensive as I thought all in £165.95. WHERE IS THE AIRBAG CONTROL MODULE ON BMW F10 F11, AIR BAG MODULE 520i 523i 525i 528i 530i 535i 518d Buy BMW Parts Here: I connected to the car with ISTA+ and it tells me the Auxiliary Battery is 60Ah model not the 90Ah one. I should mention the following for anyone else looking for replacement batteries. They're easily found searching for the BCI (Battery Council International) group as follows: For the 60Ah battery search online for "type 27 agm battery" example. The alphanumeric "N63" BMW engine code breaks down like this: N = "New Generation" of BMW engines. 6 = internal code for 8-cylinder engine. 3 = technical design code (in this case turbocharged with Direct Injection) B = benzine (gasoline) 44 = 4.4 liter. O = power output class (there are 7 different classes, O is for Obere or upper) 0 = version 1,083. Posts. Drives: 330e xDrive Touring. Join Date: Oct 2020. Location: South Coast. iTrader: ( 0) I believe the battery is located under the shark fin antenna. You have to remove the headlining to get to it - usually a dealer job, but there are videos on YouTube showing the replacement if you are feeling brave. Appreciate 0. The site and diagnostics state it should be in the trunk compartment, right side by fuse box. Ive found the regular battery, where the spare tire compartment is located, but cannot find the auxiliary battery. Agin, this is bought in Germany and built in Germany, hoping thats the issue and BMW found an alternate spot for this battery. F10�Driver�Assistance�Systems 1.�Introduction 1 BMW�has�always�offered�a�comprehensive�range�of�driver�assistance�systems. These�systems�make�it�easier�for�the�driver�to�control�the�vehicle,�by: • providing�the�driver�with�information, • prompting�the�driver�how�to�act�or - after changing the battery, it is now obvious the car was running less smoothly (not rough though) BMW wanted $300+ for a new battery, my local indy wanted about $280 for a battery. Then installation and coding on top of that. So, final price probably near $500. F that. So I also shopped the auto parts stores. 2OsQJG.