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Service bulletins for the 2014 Audi A4 allroad

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.

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

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Only bulletins with component: Cooling system are shown. Show all

Bulletins, newest first
Circular - 19N82019-05-06. Service bulletin. ENGINE AND ENGINE COOLING:COOLING SYSTEM; ENGINE AND ENGINE COOLING. After-Run Coolant Pump
A191789 2046712-2018-02-05. Service bulletin. ENGINE AND ENGINE COOLING:COOLING SYSTEM. This informational bulletin contains guidelines for figuring out why coolant marks are present around the coolant expansion tank cap.
A661443 2038652-2017-12-05. Service bulletin. ENGINE AND ENGINE COOLING:COOLING SYSTEM:RADIATOR ASSEMBLY. Supersedes Technical Service Bulletin Group 66 number 14-42 dated October 9, 2014. The paint is flaking off of the radiator grille or front license plate holder. The surfaces of these components were too smooth (due to high-gloss polishing tools), which led to weak adhesion of the paint during production. Only components with color index T94 are affected.
A661442 2038652-2017-12-05. Service bulletin. ENGINE AND ENGINE COOLING:COOLING SYSTEM:RADIATOR ASSEMBLY. The paint is flaking off of the radiator grille or front license plate holder. The surfaces of these components were too smooth (due to high-gloss polishing tools), which led to weak adhesion of the paint during production. Only components with color index T94 are affected.
A801406 2033806-2017-11-08. Service bulletin. ENGINE AND ENGINE COOLING:COOLING SYSTEM. Supersedes Technical Service Bulletin Group 80 number 13-05 dated September 11, 2013. Malfunction Indicator Lamp is on. Climate system heating performance is insufficient. Coolant level warning is on. Engine temperature is elevated. "Limp Home" mode is active. Faults are stored in the transmission control module (address word 02). Coolant loss is found from one or more control valves: N82, N509, or N488. Coolant may have migrated into the wiring harness through the connector and into various control units. Climate system heating performance is insufficient due to coolant loss, or due to a faulty N82 control valve. Inspection of the coolant control valves N82, N509, or N488 reveals the presence of coolant inside the electrical connector as shown in the illustration. The connectors, wiring harness, and/or connected control units may have been damaged from exposure to coolant.
A871345 2024644-2017-10-31. Service bulletin. ENGINE AND ENGINE COOLING:COOLING SYSTEM:HOSES/LINES/PIPING/FITTINGS. Supersedes Technical Service Bulletin Group 87 number 13-41 dated May 30, 2013. Moisture in the driver or front passenger foot well. Due to a faulty and/or incorrectly installed condensation drain hose, condensation from the evaporator could enter the front foot well areas through a gap between the body and the sealing surface of the drain hose.
A191557 2040043-2017-10-25. Service bulletin. ENGINE AND ENGINE COOLING:COOLING SYSTEM. Customer states that engine overheats. No MIL. No related DTCs are stored. Various parts have been replaced under warranty for the condition noted above, but no issues were identified with these parts. In an effort to gain information on the overheat condition for the vehicles listed above, we are asking that you contact the Audi Technical Assistance Center (TAC) before replacing any parts. This will assist us in diagnosing any potential issues with the condition noted above. No changes to production have been made, as no issue has been identified.
A191666 2043142-2017-10-04. Service bulletin. ENGINE; ENGINE AND ENGINE COOLING:COOLING SYSTEM; ENGINE AND ENGINE COOLING. The MIL is sporadically on. One or more of the following DTCs is stored in the engine control module (ECM, J623 (address word 01). They are DTC P261A00 (Coolant Pump ?B? Control Circuit/Open), DTC P261B00 (Coolant Pump ?B? Control Circuit Range/Performance), and DTC P261C00 (Coolant Pump ?B? Control Circuit Low). The continued coolant circulation pump sporadically fails.
A191672204314222017-02-15. Service bulletin. ENGINE AND ENGINE COOLING:COOLING SYSTEM. THIS TECHNICAL SERVICE BULLETIN INSTRUCTS THE READER TO REPLACE THE AUXILIARY COOLANT PUMP IF CERTAIN DTCS ARE STORED.
A011668204049142017-02-15. Service bulletin. ENGINE AND ENGINE COOLING:COOLING SYSTEM. THIS TECHNICAL SERVICE BULLETIN PROVIDES TROUBLESHOOTING INSTRUCTIONS TO RESOLVE A COOLANT WARNING AND STORED DTC.
A191672204314222017-02-11. Service bulletin. ENGINE AND ENGINE COOLING:COOLING SYSTEM. THIS TECHNICAL SERVICE BULLETIN INSTRUCTS THE READER TO REPLACE THE AUXILIARY COOLANT PUMP IF CERTAIN DTCS ARE STORED.
A011668204049142017-02-10. Service bulletin. ENGINE AND ENGINE COOLING:COOLING SYSTEM. THIS TECHNICAL SERVICE BULLETIN PROVIDES TROUBLESHOOTING INSTRUCTIONS TO RESOLVE A COOLANT WARNING AND STORED DTC.
A171675203811972016-10-06. Service bulletin. ENGINE AND ENGINE COOLING:COOLING SYSTEM. THIS TECHNICAL SERVICE BULLETIN INSTRUCTS THE READER TO TEST FOR AND REPLACE A DEFECTIVE OIL LEVEL SENSOR.
TSB-01-15-312015-10-13. Service bulletin. ENGINE AND ENGINE COOLING:COOLING SYSTEM. AUDI: SOME VEHICLES WILL EXPERIENCE WARNING COOLANT LEVEL IS ON, ELEVATION OF ENGINE TEMPERATURE, AN ACTIVE LIMP HOME MODE DUE TO PERFORMANCE OF CLIMATE SYSTEM HEATING IS INSUFFICIENT DUE LOSS OF COOLANT RESULTING IN COOLANT MIGRATION OF ELECTRICAL HARNESS AND AIR CONDITIONING ELECTRONICS. MODEL 2010-14 A6, 7, 8, 4, 5, A5 CABRIOLET, TT, Q5, 7. *PE

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