NHTSA Complaint #11669274 — 2024 AUDI Q3

We are submitting this formal complaint regarding a recurring and unresolved issue with the HVAC (air conditioning) system in our 2024 Audi Q3 Quattro S Line. Since February 2024, we have consistently experienced failures in the climate control system, particularly after exposure to rainy conditions. Specifically: 1. The front air vents begin blowing warm air at random intervals, even when set to cool. 2. The rear vents completely shut off airflow during these instances. 3. This occurs most frequently during or after rain but now occurs in dry weather as well. We believe this issue compromises the safety and comfort of the vehicle's cabin environment. The manufacturer, Audi (Volkswagen Group of America), asserts this behavior is normal per FMVSS 103 regulations and the "cabin capacity requirements" of the Q3. Specifically stated in Audi Corp. email from March 6, 2025: “From the NHTSA homepage using the search bar>search FMVSS>Select NHTSA Statutes, Regulations, Authorities and FMVSS>Select FVMSS under Federal Motor Vehicle Safety Standards>Scroll down or utilize the table of contents to locate 571.103. Dimensions for the interior cargo space in your 2024 Audi Q3. - Headroom (Front/Rear): 39.6/37.6 in., Legroom (Front/Rear) 40/36.1 in., Cargo volume behind first row: 48 cu.-ft., Cargo volume behind second row: 23.7 cu.-ft” However, a review of FMVSS 103 (Windshield Defrosting and Defogging Systems) reveals no explicit requirement that mandates the rear vents be disabled during humidity control. Additionally, no documentation has been provided by Audi to substantiate this claim. This issue potentially violates FMVSS 103's intent, which is to ensure adequate visibility and cabin comfort. With passengers, especially children, experiencing unacceptable conditions in the rear seat, we urge the NHTSA to investigate whether: The behavior described is part of a broader defect pattern, 2. Audi's HVAC system logic conflicts with FMVSS standards or consumer safety expectations.