Generations

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Engine Codes

Engine code MY Model ECU Notes
APB 1998-2001 North American S4 see below
ASJ 2000? RS4 F-box Bosch MAF
AZR 2001?-2003 Q/K-box
AGB 1997-2001? European S4 C/D-box No post cat O2 sensors, Bosch MAF, original intake manifold
AZB 2001? G/N/P-box
APB 2000-2002 allroad/A6 click here 4B0 - A6, 4Z7 - allroad, ME7.1
BEL 2003-2004 North American allroad 4Z7907551S/T/AA ME7.1.1
BES 2003-2004 European allroad 4Z7907551N/P

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 AGB engine code (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, Square side repeaters, Washer nozzles located on top of hood, Manually operated seats, Split (2-piece) Xenons with separate side repeaters
2000 A-Box 09/99-05/00 Possibly Al uprights, interchangable with ESP/Hitachi equipped cars but requires engine recode and a Bosch MAF
B-Box 710A Tiptronic no Possibly Al uprights, interchangable with ESP/Hitachi equipped cars but requires engine recode and a Bosch MAF
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 09/00-05/01 710B Revised TBB, updated intake manifold, sport package (w/Al mirrors) avail, Avant avail
M-Box 6-speed
2002 T-Box 06/01-07/01 Interchangable with M-Box
AA-Box Tiptronic Interchangable with L-Box

Notes

  • The build date cutoff for 2001 to 2001.5 is inconsistent and sometimes arbitrary. Both '01 and '01.5 cars have been reported as 09/00 build.
  • Manufacturer Year is inconsistent and sometimes arbitrary.
  • It is a common misconception that 2001.5 introduced updated oil lines. There is no conclusive evidence of this.
  • 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.

Compatibility with A6 2.7ts

  • C5 A6 ecu's work on a S4 using a bench flasher in boot-mode to bypass the IMMO-EEPROM.
Box MY Rev Notes
4B0 907 551 K '00 APB ME7.1 6sp
4B0 907 551 P '01
4B0 907 551 AA
4B0 907 551 AK '02
4B0 907 551 L '00 tip
4B0 907 551 Q '01
4B0 907 551 T
4B0 907 551 AL '02
4B0 907 551 R  ?? AZA ME7.1 6sp
4B0 907 551 AD/AH '03-'04 ??
4B0 907 551 P  ??
4B0 907 551 S

Compatibility with allroad 2.7ts

Box MY Rev Trans Notes
4Z7 907 551 '01 APB ME7.1 6mt APB S4 compatible
4Z7 907 551 X '01 6mt (x denotes reman)
4Z7 907 551 K '01 tip
4Z7 907 551 L '01, '02 6mt
4Z7 907 551 M '02 tip
4Z7 907 551 S '03 BEL ME7.1.1 cross codable tip/6sp BEL ar/A6 compatible
4Z7 907 551 T '03
4Z7 907 551 AA '04

Full list here:

http://nyet.org/cars/files/stock/part-numbers.txt

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

B5 S4 Avant: Audi Import Figures (U.S. Market Only.)

Model Year Total Imported Automatic 6-Spd Manuals
2001 1,257 404 853
2002 283 188 95
Total 1540 592 948

Notes

  • Audi did sell some B5/S4 Avants in 2000CY, but they were early '01MY models.
  • Audi is not able to differentiate between 2001MY and 2001.5 MY S4 Avants in their U.S. Market Import / Sales records.
  • Audi did not produce a 2003MY B5/S4 Avant. However, there were a few "left-over" 2002MY units sold in 2003CY.

Source: Audi's "Product Support Engineering" office in Auburn Hills, Michigan.

AoA has confirmed the following "U.S. Import" figures for "Silver" B5/S4 Avants:

  • B5/S5 Avants in Silver (Total 2001 & 2002 Models): 672 Vehicles.
  • B5/S4 Avants in Silver with 6-Spd Manual (Total 2001 & 2002 Models): 399 Vehicles.
  • B5/S4 Avants in Silver with 6-Spd Manual (2001 Model Year only): 358 Vehicles.

Of these 358 Silver 2001 B5/S4 Avant 6-Speed Manuals....

  • 24 were '01 B5/S4 Avant Silver 6-Spd Manuals with "Silver Interiors".
  • 51 were '01 B5/S4 Avant Silver 6-Spd Manuals with "2-Tone / Black & Silver Interiors".
  • 283 were '01 B5/S4 Avant Silver 6-Spd manuals with "Black Interiors".

Source: Audi's "Product Support Engineering" office in Auburn Hills, Michigan. (Silverarrow)

References

  1. http://forums.audiworld.com/s4/msgs/2277516.phtml