Next, remove the vent tube on the side of the battery near the positive terminal. There are clips on either side and you just position your screw driver as shown below and pop them out.Īfter releasing the 2 metal holders, your entire red power box should come loose. This is where your screw driver comes in. ![]() If your rachet is all metal like mine, make sure you don't hit any metal part of your car or it will cause a big short.Īfter loosening the positive terminal's nut, you now have to release the clips holding the big red power box to the sides of the battery. Flip up the cover as shown below to expose the positive terminal of the battery.Īgain, use your 10mm socket and rachet to loosen this nut. Next step is to remove the battery's positive terminal along with that big red box on top of the battery. Once you have the negative terminal removed, set it aside so that you don't accidentally hit it with anything. Just loosen it enough to be able to remove the terminal. You don't need to completely remove the nut. Second step is to remove the battery's negative terminal using your 10mm socket and rachet. Once you have this bracket removed, you'll now have access to the entire battery as shown: *** Image taken from the web because my image came out blurry.įirst step is to remove the 2 10mm nuts holding that black curved bracket. Pop the trunk and pop the carpet in order to expose the battery. From other videos I watched, they said you needed a 13mm. Unfortunately, batteries can't be shipped out because it's considered hazardous material so you have to buy this from your local dealer if you choose to stick with OEM. If your current battery has different specs, ask Jason or your local dealer what your replacement part number is. Jason Tischer helped me out a lot and he said that this battery is obsolete and that the new replacement part number is 61 21 2 353 808. My old battery's part number is 61 21 7 604 815. Like I said earlier, try to keep the specs the same as your old battery unless you're planning to code it. I have a lead-acid battery with 80Ah and 640CCA. ![]() ![]() For some, this process might be simple but I just wanted to help out anybody who's intimidated by changing the battery because of the system complications and how much stuff the battery has on top of it.įirst check your battery specs. I tried searching the forum on how to replace the battery but I didn't find any. I also found out that each car from the exact same model and exact same model year could have different batteries!!! I was literally doing this -> So it's best to stick with whatever battery specs you have installed in your car unless you are planning to code it. Then I found out that there are different types, Ah, CCA's, etc. When my car died last week, I thought I could just replace the battery with whatever's available in an auto parts store. BMW: why do you have to make the battery system so complicated! I never thought that replacing a battery could be so complicated.
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