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Service bulletins for the 2009 Audi A4

A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.

775 on file from NHTSA, as of 2026-10-19.

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Only bulletins with component: Turbocharger or supercharger are shown. Show all

Bulletins, newest first
21121020312452024-02-20. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE:GASOLINE:TURBO/SUPERCHARGER. P0299 Negative pressure deviation, turbocharger excessive wastegate play
011330202708252023-01-03. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE:GASOLINE:TURBO/SUPERCHARGER. DTC P0234 (Turbo/Super Charger Overboost Condition) is stored in the engine control module, J623 (address word 01). No other DTCs are stored. Technical Background DTC P0234 can be set inadvertently by the software application.
011330202708252022-10-31. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE:GASOLINE:TURBO/SUPERCHARGER. DTC P0234 (Turbo/Super Charger Overboost Condition) is stored in the engine control module, J623 (address word 01). No other DTCs are stored. Technical Background DTC P0234 can be set inadvertently by the software application.
011330202708252022-09-26. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE:GASOLINE:TURBO/SUPERCHARGER. DTC P0234 (Turbo/Super Charger Overboost Condition) is stored in the engine control module, J623 (address word 01). No other DTCs are stored. Technical Background DTC P0234 can be set inadvertently by the software application.
1314203124552022-08-01. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE:GASOLINE:TURBO/SUPERCHARGER. Under certain driving conditions, the linkage for the waste gate actuation can encounter excessive wear which leads to play at the waste gate flap. This leads to boost escaping through a loose flap, which sets DTC P0299 (Negative Pressure Deviation).
1313203124542022-08-01. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE:GASOLINE:TURBO/SUPERCHARGER. Under certain driving conditions, the linkage for the waste gate actuation can encounter excessive wear which leads to play at the waste gate flap. This leads to boost escaping through a loose flap, which sets DTC P0299 (Negative Pressure Deviation).
1312203124532022-08-01. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE:GASOLINE:TURBO/SUPERCHARGER. Under certain driving conditions, the linkage for the waste gate actuation can encounter excessive wear which leads to play at the waste gate flap. This leads to boost escaping through a loose flap, which sets DTC P0299 (Negative Pressure Deviation).
1311203124522022-08-01. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE:GASOLINE:TURBO/SUPERCHARGER. Under certain driving conditions, the linkage for the waste gate actuation can encounter excessive wear which leads to play at the waste gate flap. This leads to boost escaping through a loose flap, which sets DTC P0299 (Negative Pressure Deviation).
A211316 2031245-2017-12-05. Service bulletin. ENGINE; ENGINE AND ENGINE COOLING:ENGINE:GASOLINE:TURBO/SUPERCHARGER. Supersedes Technical Service Bulletin Group 21 number 13-14 dated June 7, 2013. MIL on. DTC P029900 (Negative Pressure Deviation) is stored as a static fault in the engine control module (ECM), J623 (address word 01). Turbocharger waste gate flap has play. Under certain driving conditions, the linkage for the waste gate actuation can encounter excessive wear which leads to play at the waste gate flap. This leads to boost escaping through a loose flap, which sets DTC P029900 (Negative Pressure Deviation).
A211313 2031245-2017-11-17. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE:GASOLINE:TURBO/SUPERCHARGER. Supersedes Technical Service Bulletin Group 21 number 13-12 dated April 1, 2013. MIL on, DTC P0299 (Negative Pressure Deviation) is stored. Turbocharger waste gate flap has play. Under certain driving conditions, the linkage for the waste gate actuation can encounter excessive wear which leads to play at the waste gate flap. This leads to boost escaping through a loose flap, which sets DTC P0299 (Negative Pressure Deviation).
A211312 2031245-2017-11-17. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE:GASOLINE:TURBO/SUPERCHARGER. Supersedes Technical Service Bulletin Group 21 number 13-11 dated March 6, 2013. MIL on, DTC P0299 (Negative Pressure Deviation) is stored. Turbocharger waste gate flap has play. Under certain driving conditions, the linkage for the waste gate actuation can encounter excessive wear which leads to play at the waste gate flap. This leads to boost escaping through a loose flap, which sets DTC P0299 (Negative Pressure Deviation).
A211311 2031245-2017-11-17. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE:GASOLINE:TURBO/SUPERCHARGER. Supersedes Technical Service Bulletin Group 21 number 12-10 dated October 25, 2012. MIL on, DTC P0299 (Negative Pressure Deviation) is stored. Turbocharger waste gate flap has play. Under certain driving conditions, the linkage for the waste gate actuation can encounter excessive wear which leads to play at the waste gate flap. This leads to boost escaping through a loose flap, which sets DTC P0299 (Negative Pressure Deviation).
A211314 2031245-2017-11-17. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE:GASOLINE:TURBO/SUPERCHARGER. Supersedes Technical Service Bulletin Group 21 number 13-13 dated April 4, 2013. MIL on, DTC P0299 (Negative Pressure Deviation) is stored. Turbocharger waste gate flap has play. Under certain driving conditions, the linkage for the waste gate actuation can encounter excessive wear which leads to play at the waste gate flap. This leads to boost escaping through a loose flap, which sets DTC P0299 (Negative Pressure Deviation).
A211210 2031245-2017-11-08. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE:GASOLINE:TURBO/SUPERCHARGER; ELECTRICAL SYSTEM. Mil on, DTC P0299 Negative Pressure Deviation. Turbocharger waste gate flap has play. Under certain driving conditions the linkage for the waste gate actuation can encounter excessive wear which leads to play at the waste gate flap. This leads to boost escaping through a loose flap which sets the DTC P0299 Negative Pressure Deviation.
SB-2031245/12016-05-09. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE:OTHER FUEL TYPES:TURBO/SUPERCHARGER. SUMMARY TO BE PROVIDED ON A FUTURE DATE.
TSB-21-12-102012-12-05. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE:GASOLINE:TURBO/SUPERCHARGER. AUDI: EXCESSIVE WEAR FROM LINKAGE FOR WASTE GATE ACTUATION, LEADS TO PLAY AT THE WASTE GATE FLAP CAUSING BOOST ESCAPING THROUGH LOOSE FLAP OF TURBOCHARGER. MODELS 2009-2010 A4, A5, A5 CAB. *PE UPDATED 04/15/2013 *JS
TSB-21-12-072012-04-07. Service bulletin. ENGINE AND ENGINE COOLING:COOLING SYSTEM; ENGINE AND ENGINE COOLING:ENGINE:GASOLINE:TURBO/SUPERCHARGER. AUDI: ON THE TURBOCHARGER ENGINE, THE COOLANT SUPPLY LINE MAY LEAK, WITHIN A SPECIFIC PERIOD AND NEEDS TO BE REPLACED. *PE
TSB-21-10-012010-06-25. Service bulletin. ENGINE AND ENGINE COOLING:COOLING SYSTEM; ENGINE AND ENGINE COOLING:ENGINE:OTHER FUEL TYPES:TURBO/SUPERCHARGER. AUDI: IT IS POSSIBLE THAT THE COOLANT SUPPLY LINE AT THE TURBOCHARGER MAY LEAK ON AUDI VEHICLES WITH 2.0L TFSI ENGINES BUILT WITHIN A SPECIFIC PERIOD. *PE
TSB-21-10-022010-06-25. Service bulletin. ENGINE AND ENGINE COOLING:COOLING SYSTEM; ENGINE AND ENGINE COOLING:ENGINE:GASOLINE:TURBO/SUPERCHARGER. AUDI: IT IS POSSIBLE THAT THE COOLANT SUPPLY LINE AT THE TURBOCHARGER MAY LEAK ON VEHICLES WITH 2.0L TFSI ENGINES BUILT WITHIN A SPECIFIC PERIOD. *PE

The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.