Audi A6: lighting & signalling MOT failures
Of the 739,365 Audi A6 MOT tests in this dataset, 5.6% recorded at least one lighting & signalling failure. It shows up most on 2002 and 2004 cars.
Often a cheap bulb, but persistent issues can mean wiring or corrosion in the units. Typical repair cost: £10–£150 (rough UK ballpark, not a quote).
Lighting & signalling failures by year
| Model year | Tests | Fail rate |
|---|---|---|
| 1995 | 325 | 8.3% |
| 1996 | 659 | 8.8% |
| 1997 | 555 | 12.8% |
| 1998 | 636 | 14.5% |
| 1999 | 1,291 | 15.9% |
| 2000 | 1,767 | 15.1% |
| 2001 | 1,911 | 15.4% |
| 2002 | 3,860 | 18.0% |
| 2003 | 6,089 | 15.9% |
| 2004 | 8,982 | 16.3% |
| 2005 | 15,073 | 15.9% |
| 2006 | 24,746 | 13.7% |
| 2007 | 40,753 | 12.9% |
| 2008 | 39,781 | 12.0% |
| 2009 | 27,891 | 10.7% |
| 2010 | 42,269 | 7.9% |
| 2011 | 43,566 | 6.7% |
| 2012 | 48,548 | 5.2% |
| 2013 | 61,043 | 4.3% |
| 2014 | 62,392 | 3.4% |
| 2015 | 64,388 | 2.0% |
| 2016 | 74,978 | 1.8% |
| 2017 | 52,499 | 1.7% |
| 2018 | 46,437 | 1.5% |
| 2019 | 40,307 | 0.9% |
| 2020 | 12,034 | 1.1% |
| 2021 | 10,295 | 1.0% |
| 2022 | 4,608 | 1.0% |
| 2023 | 1,049 | 2.1% |
| 2024 | 493 | 2.8% |
Methodology & source. Dataset: DVSA MOT testing data (2021,2022,2023,2024,2025). Data last updated 2026-07-27. Figures reflect MOT-testable defects only — read the methodology for how these are calculated and what they don't measure.