My wife's 2001 9-5 needs a new driver's seat belt buckle. It's getting pretty hard to get the belt to latch and unlatch. According to the EPC, the 2001 models use a unique buckle, part number 5205471. Does anyone know if there's a reason for that, or should it be compatible with years before or after 2001? It seems odd that they'd use a special part for just that year. Thanks!