OES stands for Original Equipment Supplier, which means the parts are made by the same company that makes the vehicle. Meanwhile, aftermarket parts are produced by a different parts company and are often designed to be compatible with as many makes and/or models as possible.
Part #’s
1J0-133-366-BH / 1J0133366 BH / 1J0 133 366 BH / 1J0133366BH
1J0-133-366-N / 1J0133366 N / 1J0 133 366 N / 1J0133366N