Looking up part # for Continental ContiTech serpentine belt, I end up with two different #numbers. 03G903137b which is also PK06 045. And, 03G903137b which says 6 PK 1050. Even thought the first sets of numbers for both are the same, the second set of # numbers are different, First one for BRM diesel 2005-06 only. Second #number is for VW Golf V, Jetta V 2.0 gasoline engine only. Now from Contenintal belt company Contitech, Service man saysto use PK 060 413. Now 3 different belts. So what up with these different second set of part numbers? I am baffeled. Can I get the truth here? I need the straight skinny. Ken Rogers

So looking at idparts and 03g903137b is the OEM number. I can't imagine the other numbers being anything other than the manufacturer's number.

03G903137B is used on 37 VAG models. http://nemiga.com/cat_spares/etka/part/03G903137B/ ETKA - Poly-v-belt - 03G 903 137 B - £21.