Does anyone know the replacement battery for a 2002 530i M sport ? I got one from Autozone in a pinch and apparently it's what they deem an alternative battery. So the right one wasn't in stock so they gave a substitute. Now that battery died after 1 month and caused all manner of lights in the cluster to go on . My tech says autozone blanked me . Wrong CCA . Dealers are also confused saying there are 2 available for that car ?