Hello, What transmission does a 2002 VW Jetta require? I don't know which transmission option this car has. I found the part number of the "security cap". OIM 321 Y35B. Fortunately Dorman makes one too so you don't have to patronize a company which lies to its customers. It's simply a plastic cover for the fill hole. It must be replaced after you break the original to get into their "sealed unit". What a foolish idea. Sorry to vent but the insistence of the parts guy that the fluid wasn't serviceable disturbed me. He was such a bland robot. At least he came around. Thanks for any info. Kira