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Service bulletins for the 2013 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.

1506 on file from NHTSA, as of 2026-10-19.

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Bulletins, newest first
A911736 2024323-2018-02-05. Service bulletin. FORWARD COLLISION AVOIDANCE: DYNAMIC BRAKE SUPPORT/BRAKE ASSIST. This bulletin contains technical information regarding when the parking aid sporadically warns of obstacles that don't exist or it is inoperative/constant warning.
A401774 2024318-2018-02-05. Service bulletin. WHEELS; SUSPENSION:FRONT:WHEEL BEARING. This technical service bulletin provides instructions for correcting a clicking sound from the wheel bearing(s).
A401768 2024318-2018-02-05. Service bulletin. WHEELS; SUSPENSION:FRONT:WHEEL BEARING. This technical service bulletin provides instructions for correcting a clicking sound from the wheel bearing(s).
A201795 2043357-2018-02-05. Service bulletin. ELECTRICAL SYSTEM:SOFTWARE; FUEL/PROPULSION SYSTEM. This technical service bulletin provides a software code for correcting an issue that causes DTC P046100.
A201794 2043357-2018-02-05. Service bulletin. ELECTRICAL SYSTEM:SOFTWARE; FUEL/PROPULSION SYSTEM. This technical service bulletin provides a software code for correcting an issue that causes DTC P046100.
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.
A171786 2048392-2018-02-05. Service bulletin. ELECTRICAL SYSTEM:SOFTWARE; ELECTRICAL SYSTEM: INSTRUMENT CLUSTER/PANEL. This bulletin contains software update ifnormation for when the instrument cluster display shows ?Please reduce oil level.?
A011728 2046232-2018-02-05. Service bulletin. ENGINE AND ENGINE COOLING. This bulletin provides a SVM code update for in Engine Control Module.
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.
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.
A011723 2048391-2018-02-05. Service bulletin. ELECTRICAL SYSTEM:SOFTWARE. This bulletin contains a software update to correct a MIL on withDTC P033300 and/or P032800.
21F2 - Circular2018-02-05. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE:GASOLINE:TURBO/SUPERCHARGER; ENGINE AND ENGINE COOLING. On Audi vehicles with 4.0L TFSI engines manufactured within a specific period, the O-rings in the coolant lines for the turbocharger may be damaged. This can result in leaks between the coolant lines and the turbocharger.
21F2 - Bulletin2018-02-05. Service bulletin. ENGINE AND ENGINE COOLING; ENGINE AND ENGINE COOLING:ENGINE:GASOLINE:TURBO/SUPERCHARGER. On Audi vehicles with 4.0L TFSI engines manufactured within a specific period, the O-rings in the coolant lines for the turbocharger may be damaged. This can result in leaks between the coolant lines and the turbocharger.
21F2 - Bulletin2018-02-05. Service bulletin. ENGINE AND ENGINE COOLING; ENGINE AND ENGINE COOLING:ENGINE:GASOLINE:TURBO/SUPERCHARGER. On Audi vehicles with 4.0L TFSI engines manufactured within a specific period, the O-rings in the coolant lines for the turbocharger may be damaged. This can result in leaks between the coolant lines and the turbocharger.
A911732 2033355-2018-02-05. Service bulletin. FORWARD COLLISION AVOIDANCE: ADAPTIVE CRUISE CONTROL. This informational bulletin contains information on why ACC sensor could be deactivated.
A461772 20478302018-02-05. Service bulletin. SERVICE BRAKES. This informational bulletin contains instructions for proper brake maintenance.
A401766 20243182018-02-05. Service bulletin. WHEELS. This technical service bulletin provides instructions for correcting a clicking sound from the wheel bearing(s).
A171784 2038119-2018-02-05. Service bulletin. EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL. This bulletin details instructions on handling when the oil minimum message appears but the oil level is above minimum but not overfilled.
A011722 2046724-2018-02-05. Service bulletin. ELECTRICAL SYSTEM:SOFTWARE. This bulletin contains a software update to address occasional stalling or running erratically without a DTC. Occasional "System too rich" entries.
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.
A001793 2047812-2018-02-05. Service bulletin. EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL. This informational bulletin contains instructions for setting up and using the SD creator program.
A261421 2036070-2017-12-14. Service bulletin. EQUIPMENT. Various noises, such as humming, vibration, and/or rattling are heard coming from under the vehicle or from near the center console area. While these types of noises could be attributed to a number of components in the vehicle, misaligned front exhaust hangers may be a contributing factor.

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