BK refers to the Mazda3 (Axela)
BKEP refers to the 2.0 litre Mazda3
BK3P refers to the 2.3 litre Mazda3
BK5P refers to the 1.5 litre Axela

BG refers to the 1st generation Protegé (7th generation Familia) and 323
BG6S refers to the 1.6 litre NA DOHC engine 323 hatchback (B6 engine)
BG6P refers to the 1.6 litre NA DOHC engine Protegé (B6 engine)
BG8P refers to the 1.8 litre NA SOHC & DOHC engine Protegé (B8-ME & BP-ZE engine)
BG8R refers to the Familia (4 dr) GT-X 4WD 1.8 litre turbo (BP-ZET engine)
BG8Z refers to the 323 GT-X, GT-R and GT-Ae 4WD 1.8 turbo (BP-ZET engine)

BHA refers to the 2nd generation Protegé (8th generation Familia)
BHAxS and BHAxZ refers to the 323 hatchbacks
BHALP refers to the 1.5 litre Protegé
BHA8P refers to the 1.8 litre Protegé

BJ refers to the 3rd generation Protegé & Protegé 5 (9th generation Familia)
BJFP refers to the 2.0 litre Protegé (FS engines)
BJFW refers to the 2.0 litre Protegé 5 (FS engines)


Please advise of updates or corrections. TIA