The only way to get a truly accurate measurement (for warranty claims) is to have a BMW service department perform a test. BMW claimed that the usable capacity for the 2014 – 2016 i3s was 18.8 3 – Set up the fresh new battery on your BMW model 2er Active Tourer. If you managed tasks well, you will certainly remember the previous battery position. Add the brand-new battery in the actual same position and put the positive cable on the corresponding space and then very same thing for the negative cable. There is a black plastic cover with several thumb nuts holding it down. Remove the carpeted side panel, remove the carpeted small floor panel to get to the black plastic battery cover. Here is a link to a good picture set of the battery replacement. IMG_0723.JPG Terminals for charging / jump starting. The ctek mus 4.3 bmw maintainer was attached to the charging post. As the charger went into bulk mode and the voltage at the post peaked at 14.5 and it was also 14.5 at the trunk battery per BMW Ctek Mus 4.3 spec. However, the reading at the auxiliary battery under the hood peaked at only at 12.86v. The average price of a 2015 BMW 3 Series battery replacement can vary depending on location. Get a free detailed estimate for a battery replacement in your area from KBB.com. Car Values. Price New Steps to change the battery in a 2016 BMW 428i xDrive Gran Coupe 2.0L 4 Cyl. Turbo Hatchback (4 Door): 1. Remove battery bracket 2. Loosen terminal clamps 3. Take out old battery. I show how you can save a bunch by replacing the positive cable (BST-Battery Safety Terminal) on your BMW yourself. BMW 5 series F10 - Battery Replacement and Programing DIY how-to guide. Bimmerlink App: nLVJ.