2021 Audi Q-Series / e-tron Turn Signal Malfunction TSB

Audi has released Technical Service Bulletin (TSB) 2058420 to address concerns regarding cracked, broken, leaking, or non-functional turn signals and front indicators in the bumper. This issue can also trigger a bulb warning light in the instrument cluster. The bulletin provides guidance for technicians on how to diagnose and address these problems, particularly focusing on identifying external damage.

Symptoms

Owners of affected vehicles may experience the following symptoms:

• The turn signal in the front bumper (specifically on the Q7) is cracked, broken, leaking, or completely non-functional.
• A bulb warning is displayed in the instrument cluster, indicating a problem with the turn signal.
• The turn signal in the rear bumper is cracked, broken, leaking, or not working.
• A bulb warning related to the rear turn signal appears in the instrument cluster.

These issues are often linked to external forces or impacts on the lamp, bumper, or underbody panels.

Fault codes / DTCs

This Technical Service Bulletin does not specify any particular Diagnostic Trouble Codes (DTCs) related to the turn signal malfunction. The primary indicator for this issue is a visible bulb warning in the instrument cluster, alongside physical damage or non-functionality of the turn signal itself.

What the service bulletin says

Technical Service Bulletin 2058420 instructs technicians to first thoroughly inspect the vehicle's body and the affected lamp(s) for any signs of external influence or physical damage. This includes looking for cracks, breaks, or leaks. It is recommended to clean the parts before inspection, as small cracks can be difficult to spot.

If the damage is found to be a result of outside influence or force, it is considered consequential damage and is generally not covered under Audi's warranty. In such cases, the situation should be explained to the customer. If no signs of external damage are present, technicians should proceed with standard diagnostic procedures to determine the cause of the turn signal issue. This ensures proper repair and accurate warranty assessment.

What to do

If you own a 2021 Audi Q5, Q7, Q8, or e-tron and are experiencing a cracked, broken, or non-functional turn signal, or if you see a bulb warning light on your dashboard, it's important to have your vehicle inspected. While the TSB indicates that external damage may not be covered by warranty, a professional diagnosis is crucial.

Contact your authorized Audi service center to schedule an inspection. They can assess whether the issue with your Audi e-tron turn signal is due to external factors or an internal component failure, guiding you on the necessary repairs and potential costs.

Source: NHTSA ID 10171353