[31A] FRONT DIFFERENTIAL
31A01A  BVM BH3	31A13A  BVM BE1 BE3
31A02A  BVM BH3	31A30A  BVM MA
31A10A  BE1	31A60A  BVA 4HP14 UP TO 04/1990
31A12A  BE3	31A65A  BVA 4HP14 SINCE 04/1990