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Service bulletins for the 2021 Audi S8

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.

1150 on file from NHTSA, as of 2026-10-19.

By type

By component

By trouble code

Only bulletins with component: Heating and air conditioning are shown. Show all

Bulletins, newest first
A8724702064077_42024-04-04. Service bulletin. VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM:REFRIGERANT HOSES AND FITTINGS. This TSB describes a method for leak detection for R134A and R1234yf refrigerant platforms only.
A9123522072285_12024-01-04. Service bulletin. VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM. This bulletin requests that technicians create a record in the Pending Service Solutions database in instances where the air conditioning function favorite on the lower display is lost.
A8723602064077_32023-11-06. Service bulletin. VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM:REFRIGERANT HOSES AND FITTINGS. This TSB describes a method for leak detection for R134A and R1234yf refrigerant platforms only.
A8723552068460_52023-11-06. Service bulletin. VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM. This bulletin provides information for when the air conditioning does not cool, DTCs P053000, or P251500 stored in C5.
A8723542071139_22023-09-01. Service bulletin. VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM; VISIBILITY. This bulletin provides information for when the HVAC blower setting adjustment is not possible.
A8723512064077_22023-09-01. Service bulletin. VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM. This TSB describes a method for leak detection for R134A and R1234yf refrigerant platforms only.
A8723502068460_42023-09-01. Service bulletin. VISIBILITY; VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM. This bulletin provides information for when the air conditioning does not cool, DTCs P053000, or P251500 stored in C5.
A8723482071139_12023-09-01. Service bulletin. VISIBILITY; VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM. This bulletin provides information for when HVAC blower setting adjustment is not possible.
A8723532061660_22023-09-01. Service bulletin. VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM. This bulletin provides information for when the air conditioning does not cool, and DTC B16A284 is stored in the thermal management control module.
A8723452041717_92023-08-04. Service bulletin. VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM. This bulletin provides information on the GFF test plan required when replacing the A/C compressor.
A8723402068460_32023-05-05. Service bulletin. ELECTRICAL SYSTEM; VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM. This bulletin provides information for when the air conditioning system does not cool the cabin and DTCs P053000 and/or P251500 are present.
A9123742069112_22023-03-06. Service bulletin. VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM; EQUIPMENT:ELECTRICAL. This bulletin provides information on a software update for when saved addresses, favorites, last destinations, HVAC favorite button assignment, and/or icon and shortcut order are lost sporadically; In rare cases the screen may turn completely blue until a bus sleep or an MMI reboot is performed. For Q3 vehicles, MMI may get stuck on the welcome screen. No DTCs are stored.
A9123732069112_12023-03-06. Service bulletin. VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM; EQUIPMENT:ELECTRICAL. This bulletin provides information on a software update for when saved addresses, favorites, last destinations, HVAC favorite button assignment, and/or icon and shortcut order are lost sporadically; In rare cases the screen may turn completely blue until a bus sleep or an MMI reboot is performed. For Q3 vehicles, MMI may get stuck on the welcome screen. No DTCs are stored.
A8023122062583_22023-02-07. Service bulletin. VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM. This bulletin provides instructions for when the customer advises that there is insufficient or uneven cabin heating from the HVAC system.
A8722272041717_82022-06-07. Service bulletin. VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM. This informational bulletin details on how to get a GFF test plan for A/C compressor replacements.
A8722252010146172022-05-05. Service bulletin. VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM. This bulletin contains instructions for properly cleaning and removing a musty odor from the heating and ventilation system.
A8721162041717_72021-10-05. Service bulletin. EQUIPMENT:APPLIANCE:AIR CONDITIONER. This informational bulletin details on how to get a GFF test plan for A/C compressor replacements.
A8720122061660_12021-01-08. Service bulletin. EQUIPMENT:APPLIANCE:AIR CONDITIONER; EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL. This bulletin contains repair instructions for when the air conditioning does not cool and DTC B16A284 is stored.

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