2015 Audi A3 electrical system problems
17 owner complaints filed with NHTSA name the electrical system on the 2015 Audi A3 — 18% of all complaints for this model year.
What owners report
“Smelt like something was burning and the smell was coming out of vents. Looked online and found that people have been having issues with the auxiliary heater for the HVAC to help the car warm up faster. I check mine and found that the connector was staring to melt. Seems like it could be a…”
filed Dec 3, 2025
“My 2015 Audi A3 1.8T is experiencing the exact same failure symptoms and operational hazards as those described in Audi’s own Warranty Extension U49, which covers certain 2017 and 2018 Audi A3 and A3 Cabriolet 2.0 TFSI models. According to Audi’s bulletin, vehicles with faulty mechatronic units are…”
filed Aug 13, 2025
Verbatim excerpts from complaints filed with NHTSA. Reports are not independently verified.
Electrical System problems in other A3 years
| Year | Reports | Share |
|---|---|---|
| 2018 A3 | 4 | 12% |
| 2017 A3 | 12 | 27% |
| 2016 A3 | 15 | 19% |
| 2012 A3 | 6 | 14% |
| 2011 A3 | 4 | 9% |
| 2010 A3 | 2 | 4% |
| 2009 A3 | 5 | 11% |
| 2008 A3 | 1 | 2% |
| 2007 A3 | 1 | 2% |
| 2006 A3 | 6 | 5% |
Other reported problem areas on the 2015 Audi A3
Counts are unique NHTSA complaints naming this component group. Complaints are unverified owner reports; mileage is computed only from complaints that included a usable odometer reading.