2021 Audi Q8 Exterior Light Moisture Accumulation TSB
This manufacturer communication, NHTSA ID 10169118, addresses exterior light moisture accumulation in 2021 Audi Q8 and other models. Understand the symptoms and recommended actions for this issue.

Also applies to
- Audi A4
- 2021
- Audi A5
- 2021
- Audi A6
- 2021
- Audi A7
- 2021
- Audi Q7
- 2021
- Audi R8
- 2021
- Audi RS 5
- 2021
- Audi RS 7
- 2021
- Audi S4
- 2021
- Audi S5
- 2021
- Audi S6
- 2021
- Audi S7
- 2021
- Audi S8
- 2021
- Audi SQ5
- 2021
- Audi TT
- 2021
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Understanding Exterior Light Moisture Accumulation
Audi has released Manufacturer Communication NHTSA ID 10169118 to address instances of "exterior lights, moisture accumulation" in various 2021 models, including the 2021 Audi Q8. This communication provides guidance to technicians on how to handle reports of moisture or condensation within the vehicle's exterior lighting components.
Symptoms of Moisture Accumulation
Owners may notice condensation or fogging inside the headlight or taillight assemblies. This can appear as water droplets or a general hazy film on the inner surface of the lens. While some minor condensation can be normal due to temperature changes, excessive or persistent moisture accumulation could indicate a problem.
Diagnosis and Trigger Conditions
Moisture inside exterior lights can occur for several reasons. It might be normal condensation caused by differences in temperature between the inside and outside of the lamp assembly. However, it could also signal a compromised seal or a manufacturing defect allowing water ingress. The manufacturer communication likely helps technicians distinguish between normal environmental effects and issues requiring repair.
Repair Procedure Summary
While the specific repair steps are not detailed in the summary, Manufacturer Communication NHTSA ID 10169118 provides instructions for Audi service technicians. This typically involves inspecting the exterior light assembly to determine the source and extent of the moisture. Depending on the diagnosis, the repair could range from allowing the moisture to dissipate naturally to resealing the light unit or replacing the affected component entirely.
Owner Action
If you own a 2021 Audi Q8 and observe persistent or significant "exterior lights, moisture accumulation," it is recommended to contact your authorized Audi dealership. Inform them about the issue and reference Manufacturer Communication NHTSA ID 10169118. Your dealer will be able to properly diagnose the condition and perform any necessary repairs according to Audi's guidelines.
Source: NHTSA Manufacturer Communication 10169118
Frequently Asked Questions
- What does "exterior lights, moisture accumulation" mean for my Audi?
- This refers to the presence of condensation or water droplets inside your vehicle's headlight or taillight assemblies. While minor fogging can be normal, excessive or persistent moisture could indicate a problem with the light's seal or housing.
- Is moisture in my 2021 Audi Q8's headlights normal?
- A small amount of condensation can be normal due to temperature fluctuations. However, if you notice significant water accumulation, large droplets, or if the moisture does not clear up, it may indicate an issue addressed by NHTSA Manufacturer Communication 10169118.
- What should I do if I see moisture in my 2021 Audi Q8's exterior lights?
- You should contact an authorized Audi service center. Explain the "exterior lights, moisture accumulation" you're observing and mention NHTSA Manufacturer Communication 10169118. They will be able to inspect the vehicle and perform appropriate diagnostics and repairs.
- Will repairs for exterior light moisture accumulation be covered under warranty?
- Coverage for repairs related to exterior light moisture accumulation typically depends on the specific cause of the issue and your vehicle's warranty status. It's best to consult your Audi dealership directly to determine if your situation is covered.
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