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The A6 is Audi's executive sedan, covered from the 1994 C4 through the C5, C6, C7 and C8 generations. Engines range from four-cylinder TFSI and V6 TDI units to the supercharged and turbo 3.0-liter V6.


The 2001 Audi A6 belongs to the A6 C5 generation, built for model years 1998–2004. Most procedures are shared with the other years of this generation, but engines, options and wiring changed from year to year, so the manual is made for the 2001 model year.
Check the model year on your VIN: on a 2001 vehicle the 10th character of the 17-digit VIN is “1”. Vehicles built for North America always carry the model year in that position; on some European or Australian vehicles it may be left unused, so in that case go by the registration papers or the build plate.
At about 25 years old, a 2001 vehicle is in the age range where wiring, rubber hoses, seals and corrosion repairs take most of the work, and where original factory information is hardest to find.
Same generation: 1998 Audi A6, 1999 Audi A6, 2000 Audi A6, 2002 Audi A6, 2003 Audi A6, 2004 Audi A6.
All Audi A6 model years: 1994 · 1995 · 1996 · 1997 · 1998 · 1999 · 2000 · 2001 · 2002 · 2003 · 2004 · 2005 · 2006 · 2007 · 2008 · 2009 · 2010 · 2011 · 2012 · 2013 · 2014 · 2015 · 2016 · 2017 · 2018 · 2019 · 2020 · 2021 · 2022 · 2023 · 2024 · 2025 · 2026
Engines
4-Cyl. TDI® engine, Mechanics AJM AVF AWX
4-Cylinder engine (5-valve), Mechanics AJP
4-cyl. Engine (5-valve, Turbo), Mechanical Components AJL AEB ANB APU
4-cylinder diesel direct injection engine (TDI), mechanics AFN AVG
4-cylinder engine (2.0 ltr. 5-valve), mechanics ALT
4-cylinder engine (5-valve turbo), mechanics AWT
6-cylinder diesel direct injection engine (TDI), mechanics AFB AKN BAU BDG BDH AKE AYM BCZ BFC
6-cylinder engine (2.4 ltr. and 2.8 ltr. 5-valve), mechanics AGA AJG ALF ALW AML AMM APS APZ ARJ ACK AGE AHA ALG AMX APR AQD ATQ ATX BDV APC ARN ASM
6-cylinder engine (2.7 ltr. 5-valve turbo), mechanics APB BEL AJK ARE AZA BES
6-cylinder engine (3.0 ltr. 5-valve), mechanics ASN AVK BBJ
8-cylinder engine (3.7 ltr., 4.2 ltr. 5-valve), mechanics ART AWN BBD AQG ANK AQJ ARS ASG
8-cylinder engine (4.2 ltr. 5-valve turbo), mechanics BRV BCY
8-cylinder engine (4.2 ltr. 5-valve with timing chains), mechanics BAS
