Service bulletins for the 2020 Audi S4
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.
942 on file from NHTSA, as of 2026-10-19.
By type
By component
By trouble code
By topic
| A9123202065817_3 | 2023-09-01. Service bulletin. EQUIPMENT; ELECTRICAL SYSTEM. This bulletin provides information for when the key user pairing process or myAudi login cannot be completed in the vehicle. |
|---|---|
| A9123182060197_4 | 2023-09-01. Service bulletin. ELECTRICAL SYSTEM; EQUIPMENT. This bulletin provides information for when there is an SOS emergency call malfunction; DTC B19BD11 or B18BD13 is stored in the telematics control module. |
| A9023382071281_1 | 2023-09-01. Service bulletin. ELECTRICAL SYSTEM: INSTRUMENT CLUSTER/PANEL; ELECTRICAL SYSTEM. This bulletin provides information for when the warning "Fault: Limited warning messages" appears in the instrument cluster with DTC B174404. |
| A8723512064077_2 | 2023-09-01. Service bulletin. VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM. This TSB describes a method for leak detection for R134A and R1234yf refrigerant platforms only. |
| A7223492064695_3 | 2023-09-01. Service bulletin. STRUCTURE:BODY:DOOR:HANDLE:INTERIOR; STRUCTURE:BODY:DOOR:HANDLE:EXTERIOR. This bulletin provides information for an entry/exit assistance comfort concern. |
| A5523792070966_1 | 2023-09-01. Service bulletin. STRUCTURE:BODY:TRUNK LID. This bulletin provides instructions for disabling and reengaging the gesture controlled rear lid (virtual pedal). |
| A4823532065978_3 | 2023-09-01. Service bulletin. STEERING:STEERING WHEEL /HANDLE BAR:HAND HEATER/COOLER. This bulletin provides information for when the steering wheel heating does not heat up sufficiently. |
| A4423022065160_2 | 2023-09-01. Service bulletin. EQUIPMENT; TIRES:TEMPORARY/EMERGENCY SPARE TIRE. This bulletin provides information for when the collapsible wheel does not fully inflate using the toolkit. |
| A4223532038689_7 | 2023-09-01. Service bulletin. SUSPENSION:REAR; SUSPENSION. This bulletin provides information for when there is a rattle noise from the rear suspension. |
| A4023672047920_7 | 2023-09-01. Service bulletin. ENGINE. This bulletin provides information when there are noises from the front end and dash panel when the vehicle is moving. |
| A9023372064789_4 | 2023-09-01. Service bulletin. EXTERIOR LIGHTING. This bulletin provides information for when there are various malfunction LEDs lit sporadically without any DTCs stored. |
| A922336203815115 | 2023-08-04. Service bulletin. VISIBILITY:WINDSHIELD WIPER/WASHER. This bulletin provides information for when the washer solvent level warning is on. |
| A9123162069596_2 | 2023-08-04. Service bulletin. EQUIPMENT:ELECTRICAL:INFOTAINMENT. This bulletin provides information for when the MIB3 pop-ups for massage functions are not displayed when the massage button is pressed. |
| A9123142065728_5 | 2023-08-04. Service bulletin. EQUIPMENT:ELECTRICAL:INFOTAINMENT. This bulletin provides information for when the Apple CarPlay screen is blank. |
| A9023322059335_4 | 2023-08-04. Service bulletin. ELECTRICAL SYSTEM: INSTRUMENT CLUSTER/PANEL. This bulletin provides information for when there is noise from the area around the instrument cluster. |
| A8723452041717_9 | 2023-08-04. Service bulletin. VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM. This bulletin provides information on the GFF test plan required when replacing the A/C compressor. |
| A9023312058077_7 | 2023-08-04. Service bulletin. SERVICE BRAKES; FORWARD COLLISION AVOIDANCE: AUTOMATIC EMERGENCY BRAKING. This bulletin provides information for when an unexpected Audi presense front intervention such as a front end warning, a warning jolt, partial braking, or emergency braking occurs and a warning appears in the instrument cluster and audibly. |
| A6423922020552_1 | 2023-08-04. Service bulletin. VISIBILITY. This bulletin provides information for when exterior glass cleaning is needed. |
| A1523442053278_9 | 2023-08-04. Service bulletin. ENGINE AND ENGINE COOLING. This bulletin provides information for when there is an oil leak from the cylinder head. |
| A6923922063398_3 | 2023-07-10. Service bulletin. SEAT BELTS. This bulletin provides information for when the seatbelt is hard to latch in the belt buckle. |
| A6923912056406_4 | 2023-07-10. Service bulletin. AIR BAGS. This bulletin provides information for when the airbag warning light is on and DTC B13BCF2 is stored in the airbag control module. |
| A4823502063528_4 | 2023-07-10. Service bulletin. STEERING. This bulletin provides information for when noises are heard inside the vehicle via the intermediate steering shaft. |
| A4823492061904_5 | 2023-07-10. Service bulletin. STEERING. This bulletin provides information for when the yellow steering malfunction light is on in the cluster and DTC C110DF0 is stored in the active steering module. |
| A4823452065871_3 | 2023-07-10. Service bulletin. STEERING. This bulletin provides information for when there is an active steering malfunction with DTC B200FF0. |
| A4823432055733_4 | 2023-07-10. Service bulletin. STEERING. This bulletin provides information for when there are squeaking noises from the rubber boot of the intermediate steering shaft. |
The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.