FORD 6153451, 6159437. FORD USA 86FB12K062AA. Engine Code: R2A; for manufacturer: Bosch. Type Switch Unit, ignition system. FORD SIERRA II Turnier (BNG) 1.8 Estate Petrol 05/1988 02/1993 RWD 8 87 64. FORD SIERRA II Hatchback (GBC, GBG) 1.8 Hatchback Petrol 05/1988 02/1993 RWD 8 87 64.