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Service bulletins for the 2023 Audi A4

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.

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

By type

By component

By trouble code

Only bulletins with component: Equipment and accessories are shown. Show all

Bulletins, newest first
AVIN4PIN202305102023-06-06. Service bulletin. EQUIPMENT:ELECTRICAL; ENGINE AND ENGINE COOLING:COOLING SYSTEM; STRUCTURE:BODY:DOOR; ENGINE AND ENGINE COOLING. Noise from front door trim panel while driving Noise from front door trim panel while driving Low coolant warning in cluster, coolant level is correct Check engine lamp is illuminated and DTC P05A000: Active Grille Air Shutter "A" Stuck is stored in the ECM. Check engine lamp is on, DTC (s) P010600, P023600, P023700, P023800 Belt noise from starter generator Leak from oil pan USB Trim detached from center console Airbag light on: DTC B100A1B or B100B1B 3.0L engine water pump leaking 3.0L engine sound generator malfunctioning
A4623432069904_12023-05-05. Service bulletin. SERVICE BRAKES; EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL; UNKNOWN OR OTHER. This bulletin provides information for when there are noises when braking, and the brake pad thickness is OK.
A2723532069916_12023-05-05. Service bulletin. EQUIPMENT:ELECTRICAL. This bulletin provides information related to maintaining the 12V Lead-acid or AGM battery when a vehicle is parked for a prolonged period of time.
A0123572069531_12023-05-05. Service bulletin. EQUIPMENT:ELECTRICAL. This bulletin provides detailed information for when the MIL light is on with specific DTC and symptom code combinations.
A6623982046229_42023-05-05. Service bulletin. EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL. This bulletin provides information on how to document optical defects in order to submit to Warranty.
A9023222032113_72023-05-05. Service bulletin. EQUIPMENT. This information bulletin contains a background on the outside air temperature reading.
A9123832037809_12023-04-06. Service bulletin. EQUIPMENT:ELECTRICAL:NAVIGATIONAL SYSTEM(GLOBAL POSITIONING SYSTEM). This bulletin provides information on how to update the navigation map.
A9023212069791_12023-04-06. Service bulletin. EQUIPMENT:ELECTRICAL:NAVIGATIONAL SYSTEM(GLOBAL POSITIONING SYSTEM). This bulletin states that it is normal operation for the navigation tab in the virtual cockpit to switch to the phone tab overnight or after a sleep cycle.
A9023192064789_32023-04-06. Service bulletin. EQUIPMENT:ELECTRICAL. This bulletin provides information for when various warning lamps are unintentionally illuminated while driving with the ACC activated.
A9023042069416_12023-03-06. Service bulletin. ELECTRICAL SYSTEM; EQUIPMENT. This bulletin provides information for when the 12V socket and/or the cigarette lighter are not working.
A9123712068171_42023-03-06. Service bulletin. EQUIPMENT:ELECTRICAL:INFOTAINMENT. This bulletin contains information on new damage codes related to the infotainment system and Audi connect, which should be used from MY 23 onwards.
A9023962067182_32023-02-07. Service bulletin. EQUIPMENT:ELECTRICAL; SUSPENSION. This bulletin provides instructions for when a message regarding CNG inspection or CNG mode is briefly displayed on the instrument cluster, despite the vehicle not being equipped with a CNG fuel system.
DC_Alternator_52023-02-07. Service bulletin. EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL. Support for Customers Affected by Alternator Back-order
DC_Alternator_42023-02-07. Service bulletin. EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL. Support for Customers Affected by Alternator Back-order
DC_Alternator_32023-02-07. Service bulletin. EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL. Support for Customers Affected by Alternator Back-order
DC_Alternator_62023-02-07. Service bulletin. EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL. Support for Customers Affected by Alternator Back-order
SM 01-20232023-02-07. Service bulletin. EQUIPMENT. This special notice is to inform dealers to return the parts listed if it meets the criteria provided.
A4323682059665_42023-02-07. Service bulletin. EQUIPMENT:ELECTRICAL. This bulletin provides instructions for when the warning light for suspension illuminates in the instrument cluster.
A0023622069282_12023-02-07. Service bulletin. EQUIPMENT. This bulletin provides instructions for when service has to be performed on the vehicle involving control module coding, adaptation, or basic settings.
DC_Alternator_22023-02-07. Service bulletin. EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL. Support for Customers Affected by Alternator Back-order
A9123592036576_72023-02-07. Service bulletin. EQUIPMENT:ELECTRICAL:INFOTAINMENT. This bulletin advises that the MMI screen may freeze, or go blank and then restart when a special character like a symbol or emoticon is used in the name field for contact(s).
A9123572068171_32023-02-07. Service bulletin. EQUIPMENT:ELECTRICAL:INFOTAINMENT. This bulletin provides warranty submission instructions for Audi connect and Infotainment for Audi vehicles beginning in MY23.
A4623402069078_12023-02-07. Service bulletin. EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL. This bulletin contains instructions for when the zirconium inserts found to be not firmly attached during service work.
DC_RECALLS2023-01-06. Service bulletin. EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL. SAFETY RECALLS, COMPLIANCE RECALLS and STOP SALES
A9722892061976_32022-12-06. Service bulletin. ELECTRICAL SYSTEM:WIRING; EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL. This bulletin contains guidance for submitting warranty wiring repairs.

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