My indy replaced my dieing battery in my '05 545i with an Interstate mtp-93. Reviews on this battery are all excellent.

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2005 545i, Jet Black, Black Leather, Cold Weather pkg, Logic7, 6 disk changer, Sport Package, Automatic, moonroof, electric rear sun shade, dark wood trim, PDC, Xenon Adaptive lights, Nav, Sat radio, 245/40 ZR18 - 275/35 ZR18 tires, Progman 30.02