Hello, Im new to the site (someone from another site recommended this site). Anyway, I have a 2003 330i and I need an alternator belt (52,000 miles). The mechanic that I took my car to said that the tensioners(?) are wound so tight on the 2003 330i series that, I will need to replace the tensioners as well as the alternator belt and the a/c belt. The total cost for this is about $660.00. Is this true? Has anyone else had any experience with this situation? HELP and thanks for any advice anyone can offer.