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We list the A4 across five generations: B5, B6, B7, B8 and B9. Engines include the 1.8T, the 2.0 TFSI, the 3.0 V6 and TDI diesels, with front-wheel drive or quattro.


Model year 2006 is part of the A4 B7 generation (2006–2008). It is the first model year of this generation: the platform, wiring and many procedures changed compared with the previous model, so a manual for an earlier year will not match it.
Check the model year on your VIN: on a 2006 vehicle the 10th character of the 17-digit VIN is “6”. 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 20 years old, a 2006 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: 2007 Audi A4, 2008 Audi A4.
All Audi A4 model years: 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-cylinder TDI unit injector engine (1.9 ltr.; 2.0 ltr. 2-valve), mechanics AVB AVF AWX BKE BPW BRC BRB
4-cylinder TDI unit injector engine (2.0 ltr. 4-valve), mechanics BVA BRD BLB BNA BRE BRF BVF BVG
4-cylinder direct petrol injection engine (2.0 ltr. 4-valve turbo), mechanics BWT BYK BPG BPJ BGB BUL BWE
4-cylinder direct petrol injection engine (2.0 ltr. 4-valve), mechanics AWA
4-cylinder engine (2-valve), Mechanics ALZ
4-cylinder engine (2.0 ltr. 5-valve), mechanics ALT
4-cylinder engine (5-valve turbo), mechanics BKB AMB AVJ BFB BEX
6-cylinder TDI engine (2.7 ltr.; 3.0 ltr. 4-valve common rail), mechanics ASB BKN BPP BSG
6-cylinder diesel direct injection engine (TDI), mechanics BAU BDG BDH AKE AYM BCZ BFC
6-cylinder direct petrol injection engine (3.2 ltr. 4-valve), mechanics BKH AUK
6-cylinder engine (3.0 ltr. 5V), mechanics ASN AVK BBJ BGN
6-cylinder engine, mechanics AMM BDV
8-cylinder direct petrol injection engine (4.2 ltr. 4-valve RS 4), mechanics BNS
8-cylinder engine (4.2 ltr. 5-valve with timing chains), mechanics BHF BBK
