Generations

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Engine Codes

  • APB (1998-2001) - North American S4
  • ASJ (2000?) - RS4 F-box
  • AZR (2001?-2003) - RS4 Q/K-box
  • AGB (1997-2001?) - European S4 C/D-box, No post cat O2 sensors, Bosch MAF, original intake manifold
  • AZB (2001?) - European S4 G/N/P-box
  • APB (?-2002) - Allroad/A6 ./X/L-box
  • BEL (2003-?) - Allroad/A6 R/MX/S/T-box

OEM equipment

MY Badge ECU Build Date MAF BPVs ESP Transmission F-hose Notes
1997-1999 2000 s4logo.png C-Box 09/97-08/99 Bosch 710 no 6-speed yes Not available in North America. Flush door handles. Early door mirrors. Thin door trim. Analog clock in dash. No plenum chamber cover. Reversed battery terminals. Face down spare.
2000 A-Box 09/99-05/00 Possibly Al uprights, interchangable with ESP/Hitachi equipped cars but requires engine recode
B-Box 710A Tiptronic no Possibly Al uprights, interchangable with ESP/Hitachi equipped cars but requires engine recode
2001 H-Box 06/00-09/00 Hitachi 710A yes 6-speed yes Steel uprights, introduction of ESP, interchangable with M-Box but requires cluster recode
J-Box Tiptronic no Steel uprights, interchangable with L-Box
2001.5 2001 s4logo.jpg L-Box 10/00-05/01 710B Revised TBB, updated intake manifold, larger oil feed lines, 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.

North American Production numbers[1]

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

2002 is 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 as too does Nilesh "Ram" Ramrattan's MTM Stage IV car (also UK spec).
  • 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.