Generations

OEM equipment

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	710A			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				710B	Revised TBB, oil inlets, sport package (w/Al mirrors) avail, Avant avail
		M-Box	6-speed, updated synchros/sliders
2002		T-Box			06/01-07/01		Interchangable with M-Box
		AA-Box	Tiptronic				Interchangable with L-Box

Note: Manufacturer Year is inconsistent and sometimes arbitrary. See Notes below.

Production numbers[1]

Build date	Sedan	Avant	total
2000	5647	25	5672
2001	4770	1228	5998
2002	642	198	840
Total	12,096	1451	13,547

2002 is actually really build date of 06/01 to 07/01

Notes

• http://forums.audiworld.com/s4/msgs/802094.phtml
• poll here: http://forums.audiworld.com/s4/msgs/2447926.phtml
• There is some confusion with cars near the 5/00 build mark (none verified)
  1. Some 2001 cars came with Bosch MAFs (and presumably A-Box ECUs).
• There is some confusion with cars near the 09/00 build mark (none verified)
  1. Some are 2001, some are 2001.5
  2. Some 2001.5 came with H-boxes and do not appear to have F-hoses
  3. Some 2001.5 are reported to have mismatching wheel/trunk badges
• Andy Whittaker's UK 1999 S4 seems to have a C box.
• The L and AA box information may be incorrect. Please mail me or post a comment in the talk section.
• If the OEM equipment on your car does not fit into this table and you are the original owner, please post a comment in the talk section.
• If the OEM equipment on your car does not fit into this table and you are not the original owner, it is highly likely that some of the parts have been swapped out.