Generations

MY	Badge	ECU	Build Date	MAF	BPVs	ESP	Transmission	F-hose	Notes
2000	[[Image:2000_s4logo.png	50px]]	A-Box	09/99-05/00	Bosch	710	no	6-speed	yes	Possibly Al uprights
		B-Box	Tiptronic					no	Possibly Al uprights
2001		H-Box	06/00-09/00	Hitachi	710A	yes	6-speed	yes	Steel uprights, interchangable with M-Box but requires cluster recode
		J-Box					Tiptronic	no	Steel uprights, interchangable with L-Box but requires cluster recode
2001.5	[[Image:2001_s4logo.jpg	50px]]	L-Box						10/00-05/01	Revised TBB, oil inlets, sport package (w/Al mirrors) avail, Avant avail
		M-Box	6-speed, updated synchros/sliders
2002		T-Box					06/01-???		Interchangable with M-Box
		AA-Box	Tiptronic						Interchangable with L-Box