Service bulletins for the 2015 Audi A8
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.
1106 on file from NHTSA, as of 2026-10-19.
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Only bulletins with component: Engine are shown. Show all
| A011727 2048411- | 2018-02-05. Service bulletin. ENGINE AND ENGINE COOLING. This bulletin contains repair instructions for when a 4.0 liter engine has a MIL on, the engine may be limited to 4,000rpm, and there are DTCs about the intake manifold flap adjustment. |
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| A011726 2048411- | 2018-02-05. Service bulletin. ENGINE AND ENGINE COOLING. This bulletin contains repair instructions for when a 4.0 liter engine has a MIL on, the engine may be limited to 4,000rpm, and there are DTCs about the intake manifold flap adjustment. |
| Email - 2.0L and | 2018-02-05. Service bulletin. ENGINE AND ENGINE COOLING:EXHAUST SYSTEM. 2.0L & 3.0L TDI Settlement Updates |
| A011719 2046232- | 2018-02-05. Service bulletin. ENGINE AND ENGINE COOLING. This bulletin provides a SVM code update for in Engine Control Module. |
| A011718 2038045- | 2018-02-05. Service bulletin. ENGINE AND ENGINE COOLING. This technical service bulletin provides instructions for replacing the coolant thermostat with a new part number to resolve a stored DTC. |
| A001795 2048152- | 2018-02-05. Service bulletin. ENGINE AND ENGINE COOLING. This informational bulletin explains why engine oil can be discolored. |
| A001794 2035581- | 2018-02-05. Service bulletin. ENGINE AND ENGINE COOLING. This informational bulletins contains instructions for proper oil filling for a W12 engine. |
| e-mail 3.0L TDI | 2018-02-05. Service bulletin. ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL. e-mail communication for 3.0L TDI Update - Claim Processing Appointments |
| A171453 2038129- | 2017-12-05. Service bulletin. ENGINE. Supersedes Technical Service Bulletin Group 17 number 14-50 dated August 15, 2014. A check with the engine oil service dipstick T40178 is necessary, but the adjustment values for the dipstick are not available in the Elsa repair manual. Because of a system change, the adjustment values for the service dipstick T40178 were removed from the repair manual. |
| A011492 2033224- | 2017-12-05. Service bulletin. ENGINE. Supersedes Technical Service Bulletin Group 01 number 13-28 dated September 12, 2013. If a model year 2015 Q5 TDI, A6 TDI, A7 TDI, or A8L TDI clean diesel (engine code CPNA or CPNB) requires diagnosis or repair of the engine, diesel fuel delivery, exhaust after-treatment (SCR/AdBlue and emissions) systems, or transmission, a Repair Authorization is necessary prior to repair. This also applies to any messages related to AdBlue shown in the DIS. These procedures are mandatory until further notice. Routine maintenance, PDI, and repair of other systems do not require prior authorization or a TAC ticket. Any repairs related to the engine, diesel fuel delivery, exhaust after-treatment (SCR/AdBlue or emissions) systems, or transmission completed without Repair Authorization via a Technical Assistance Center (TAC) contact will not be reimbursed. |
| A211419 2034999- | 2017-12-05. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE:GASOLINE:TURBO/SUPERCHARGER. Supersedes Technical Service Bulletin Group 21 number 13-17 dated August 16, 2013. On 4.0l bi-turbo FSI engines, the pipe on the impeller side of the bank 2 turbocharger looks discolored when compared to the pipe on the bank 1 turbocharger. |
| A011498 2038166- | 2017-12-05. Service bulletin. ENGINE AND ENGINE COOLING. The engine warning light is on after engine replacement. The engine is not running roughly. However, fault codes are stored in the engine control module (ECM). The fault codes occur at light load, between 8% and 14% accelerator pedal position. The programmed values for the misfire adaption are not automatically reset when the memory is deleted. The adaption must be reset after the engine is installed. |
| A211317 2034999- | 2017-12-05. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE:GASOLINE:TURBO/SUPERCHARGER. On 4.0l bi-turbo FSI engines, the pipe on the impeller side of the bank 2 turbocharger looks discolored when compared to the pipe on the bank 1 turbocharger. The crankcase breather is only connected to the bank 2 turbocharger inlet. Blow-by gases from the crankcase breather discolor the pipe. This is a normal condition. |
| A011369 2028344- | 2017-11-17. Service bulletin. ENGINE AND ENGINE COOLING:EXHAUST SYSTEM; ENGINE AND ENGINE COOLING. Supersedes Technical Service Bulletin Group 01 number 12-57 dated October 29, 2012. Noises/inconsistent engine operation after cold start during the catalyst heating phase. The customer may interpret this engine roughness as misfiring. To comply with the legal requirements on exhaust gas emissions according to the LEV-1 and LEV-2 standards, a high exhaust gas quality must be ensured. The necessary catalyst only operates at a temperature over 300°C (572°F). To achieve this, the catalyst is heated up. The catalyst heating phase is achieved by a late ignition angles and by introducing additional fresh air to the exhaust valves (secondary air system). Late ignition angles make sure that the exhaust gas from the cylinders has a higher temperature. This exhaust gas includes fuel that is un-burnt, and was deliberately injected into great quantities. The secondary air system adds fresh air to the exhaust gas as it leaves the cylinder and the extra fuel is burnt. As a result, the temperatures of the exhaust gas and of the catalyst increase quickly. The afterburning in the exhaust manifold before the catalyst changes the sound characteristic of the engine. This heating-up of the catalyst, including afterburning, is normal and has no effect on the service life of the engine. During this catalyst heating phase, the engine has increased idle speed, may have increased vibrations, and has a different sound characteristic. Depending on conditions, the time of the catalyst heating phase varies. |
| A191562 2025303- | 2017-11-17. Service bulletin. ENGINE AND ENGINE COOLING. Supersedes Technical Service Bulletin Group 19 number 15-61 dated July 7, 2015. Discontinuation and mixing of Audi-approved engine coolants. G11, G12, and G12+ coolants have been replaced by an improved version. G12++ coolant (for service available) has been introduced in MY 2005 for all engines. G13 has been introduced in MY 2008 as factory filling and service. |
| A171565 2038129- | 2017-11-17. Service bulletin. ENGINE. Supersedes Technical Service Bulletin Group 17 number 15-63 dated June 2, 2015. A check with the engine oil service dipstick T40178 is necessary, but the adjustment values for the dipstick are not available in the Elsa repair manual. Because of a system change, the adjustment values for the service dipstick T40178 were removed from the repair manual. |
| Dealer Letter - | 2017-11-17. Service bulletin. ENGINE. This is an update to the November 3, 2015 communication where Volkswagen Group of America, Inc. issued a stop sale order for all 2013-2016 model year Audi vehicles equipped with a Gen II 3.0 liter V6 TDI engine. This was in response the notice received from the U.S. Environmental Protection Agency and California Air Resources Board of an investigation related to certain emissions compliance matters impacting certain 3.0 liter V6 TDI engine vehicles. Audi continues to actively cooperate with the relevant authorities to resolve the November 2, 2015 EPA notice of violation. |
| A011257 2028344- | 2017-11-08. Service bulletin. ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL:CATALYTIC CONVERTOR; ENGINE AND ENGINE COOLING. Supersedes Technical Service Bulletin Group 01 number 12-51 dated July 18, 2012. Noises/inconsistent engine operation after cold start during the catalyst heating phase. The customer may interpret this engine roughness as misfiring. To comply with the legal requirements on exhaust gas emissions according to the LEV-1 and LEV-2 standards, a high exhaust gas quality must be ensured. The necessary catalyst only operates at a temperature over 300°C (572°F). To achieve this, the catalyst is heated up. The catalyst heating phase is achieved by a late ignition angles and by introducing additional fresh air to the exhaust valves (secondary air system). Late ignition angles make sure that the exhaust gas from the cylinders has a higher temperature. This exhaust gas includes fuel that is un-burnt, and was deliberately injected into great quantities. The secondary air system adds fresh air to the exhaust gas as it leaves the cylinder and the extra fuel is burnt. As a result, the temperature of the exhaust gas and of the catalyst increases quickly. The afterburning in the exhaust manifold before catalyst changes the sound characteristic of the engine. This heating-up of the catalyst, including afterburning, is normal and has no effect on the service life of the engine. During this catalyst heating phase the engine has increased idle speed, may have increased vibrations, and a different sound characteristic. Depending on conditions the time of the catalyst heating phase varies. |
| A001463 2033576- | 2017-11-08. Service bulletin. ENGINE; EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL. Supersedes Technical Service Bulletin Group 00 number 13-49 dated May 14, 2013. Although the correct amount of oil was added to the engine during an oil change service, a check of the oil level shows that the oil level is not okay. When an unapproved aftermarket speed-filling device is used to add oil to the engine, the increased oil flow rate may force oil into the intake manifold or combustion chamber, creating the potential for engine damage. |
| AWC-14-08 | 2017-11-08. Service bulletin. ELECTRICAL SYSTEM:SOFTWARE; ENGINE AND ENGINE COOLING. This document conveys general information on the missing engine code CTGA. |
| A191450 2025303- | 2017-11-08. Service bulletin. ENGINE AND ENGINE COOLING. Supersedes Technical Service Bulletin Group 19 number 13-41 dated June 20, 2013. Discontinuation and mixing of Audi-approved engine coolants. G11, G12, and G12+ coolants have been replaced by an improved version. G12++ coolant (for service available) has been introduced in MY 2005 for all engines. G13 has been introduced in MY 2008 as factory filling and service. |
| A001464 2035581- | 2017-11-08. Service bulletin. ENGINE AND ENGINE COOLING. Supersedes Technical Service Bulletin Group 00 number 13-55 dated October 21, 2013. Although the correct amount of oil was added to the engine during an oil change service, a check of the oil level shows that the oil level is not okay. When an unapproved aftermarket speed-filling device is used to add oil to a W12 engine, the increased oil flow rate forces oil into the intake manifold or combustion chamber and damages the engine. |
| A011462 2036169- | 2017-11-08. Service bulletin. ENGINE. Supersedes Technical Service Bulletin Group 01 number 14-59 dated January 21, 2014. The MIL is on. DTC may be stored in the ECM. Drivability concerns such as hard starting/no starting are present. Outside temperature is sub-freezing. In tank, fuel pump may be making a straining noise. |
| A011459 2036169- | 2017-11-08. Service bulletin. ENGINE. Supersedes Technical Service Bulletin Group 01 number 14-55 dated January 8, 2014. The MIL is on. DTC P0087 may be stored in the ECM. Drivability concerns such as hard starting/no starting are present. Outside temperature is sub-freezing. In tank, fuel pump may be making a straining noise. |
| A011455 2036169- | 2017-11-08. Service bulletin. ENGINE; FUEL SYSTEM, GASOLINE:DELIVERY:FUEL PUMP. The MIL is on. DTC P0087 may be stored in the ECM. Drivability concerns such as hard starting/no starting are present. Outside temperature is sub-freezing. In tank, fuel pump may be making a straining noise. Diesel fuel requires additive blending or ?winterization? to be useable at low temperatures. At temperatures below 20° F (-7° C), No. 2 Diesel with insufficient winterization blending may lose its fluidity due to wax separation. This may clog the fuel filter or in-tank filter, preventing the engine from operating properly. No. 2 Diesel is blended by refineries to various levels of winterization (minimum useable temperature) based on month, geographical location, and the 10th percentile minimum ambient air temperature for the given region. Although rare, during sudden periods of extreme low temperatures (record lows), fuel stations may not be adequately prepared with No. 2 Diesel fuel with sufficient winterization to resist wax formation or ?gelling?. |
The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.