The 2003 BMW 745li's battery isn't in the typical place You'd expect, so You're forgiven for not being able to find it. Instead of being located in the engine compartment, it's instead located in the rear trunk of the vehicle. Yes, BMW's wiring runs a little wonky for us Americans, so You'll need to wrap Your head around that concept as well. To access the battery, You'll first need to open the trunk, access the spare tire compartment, and remove the spare tire. Then, You'll find the battery conveniently nestled on the right side of that compartment. It can be a bit difficult to access the terminals because of the tight fit, but with a little skill and a little luck, You'll have it out in no time.
Maurice M
July 16, 2020
You'll find the battery in your 2003 745i on the right side of your engine under the hood, along your vehicle's firewall.
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