Well here is a different twist on the oem batteries. My car is a 2008 and built on 10/16/07 and has it's oem battery. Here is the difference. It is a white case, twin handle Varta but it has a CCA of 700 and a RC of 150. To top it all off it was made in Germany, not Spain like the others and it states in two places that it's a BCI group#48 size.