On average, 31.9% of cars will fail their MoT test in Cardiff, which puts the region above the national average of 29.7%. The most common failure causes are Suspension, Lamps, reflectors and electrical equipment and Brakes.

Cars registered in 2004 have the worst overall MoT pass rate, at 48.4%. The manufacturers with the highest fail rate in this region are Chevrolet, Rover and Daewoo. At the opposite end of the scale with the best pass rates are Lexus, Bentley and Aston Martin.

Most common reasons for MoT failure

Test Item Failure Rate National Failure Rate Relative Rate
Suspension 10.1% 9.6% +6%
Lamps, reflectors and electrical equipment 10.1% 11.9% −15%
Brakes 8.2% 7.7% +7%
Tyres 7.0% 5.8% +21%
Visibility 5.9% 5.3% +10%
Body, chassis, structure 3.8% 4.1% −7%
Noise, emissions and leaks 3.4% 3.6% −4%
Steering 2.0% 1.9% +6%
Seat belts and supplementary restraint systems 1.3% 1.3% +4%

MoT failure rates by year of registration

Year of Registration Tests Failure Rate National Failure Rate Relative Rate
2021 61 16.4% 17.5% −7%
2020 199 13.6% 16.7% −19%
2019 1,509 8.3% 10.3% −19%
2018 36,588 11.6% 11.7% −1%
2017 36,343 13.9% 13.2% +5%
2016 41,073 18.4% 16.5% +11%
2015 41,213 22.6% 19.5% +16%
2014 40,650 26.8% 23.0% +16%
2013 36,746 31.7% 27.2% +17%
2012 30,846 35.2% 30.5% +16%
2011 27,341 39.0% 33.4% +17%
2010 26,110 42.9% 36.8% +16%
2009 23,596 44.8% 39.1% +15%
2008 21,755 47.6% 41.5% +15%
2007 20,626 48.0% 42.6% +13%
2006 16,318 49.9% 43.9% +14%
2005 12,552 50.3% 44.9% +12%
2004 9,547 51.6% 45.7% +13%
2003 6,945 50.5% 45.6% +11%
2002 4,824 50.9% 45.2% +13%
2001 2,834 48.3% 43.9% +10%
2000 1,748 46.2% 42.5% +9%
1999 1,221 47.3% 40.8% +16%
1998 873 43.8% 38.5% +14%
1997 615 42.1% 37.5% +12%
1996 339 41.3% 36.5% +13%
1995 274 41.6% 35.3% +18%
1994 191 38.7% 34.4% +13%
1993 195 38.5% 34.7% +11%
1992 202 34.2% 32.9% +4%
1991 202 34.7% 32.3% +7%
1990 215 34.0% 30.9% +10%
1989 173 36.4% 29.6% +23%
1988 134 33.6% 30.2% +11%
1987 89 32.6% 29.5% +10%
1986 71 29.6% 28.9% +3%
1985 62 24.2% 28.3% −15%
1984 51 15.7% 28.1% −44%

MoT failure rates by make

Make Tests Failure Rate National Failure Rate Relative Rate
Aston Martin 104 13.5% 10.3% +31%
Bentley 164 15.2% 10.3% +47%
Lexus 1,893 17.1% 18.7% −9%
Porsche 1,923 18.4% 14.9% +23%
MG 2,079 20.4% 28.9% −29%
Abarth 338 20.7% 20.8% −0%
Skoda 9,188 24.4% 23.5% +4%
Audi 23,424 24.4% 22.3% +10%
Dacia 4,065 25.2% 24.7% +2%
Land Rover 9,878 26.0% 25.2% +3%
BMW 22,623 26.1% 22.9% +14%
Kia 12,587 27.2% 26.5% +3%
Isuzu 610 27.5% 40.7% −32%
Mercedes-Benz 15,860 27.6% 22.3% +24%
MINI 9,345 27.6% 25.5% +9%
Jaguar 4,410 27.7% 23.9% +16%
SEAT 7,963 27.7% 27.1% +2%
Jeep 922 28.3% 26.1% +9%
Hyundai 16,236 28.6% 26.1% +10%
SsangYong 398 28.6% 30.6% −6%
Suzuki 9,582 29.0% 27.5% +5%
Toyota 19,265 29.2% 27.1% +8%
Honda 11,727 29.8% 28.2% +5%
Subaru 567 29.8% 27.8% +7%
Mazda 7,765 31.2% 28.2% +11%
Volvo 6,859 31.4% 28.9% +9%
Mitsubishi 5,224 32.3% 28.7% +12%
Volkswagen 47,691 32.8% 29.0% +13%
Nissan 24,112 33.2% 29.5% +12%
FIAT 14,382 34.3% 32.2% +7%
smart 174 35.6% 31.9% +12%
Ford 89,710 35.8% 31.5% +14%
Peugeot 23,374 37.0% 34.0% +9%
Alfa Romeo 1,231 37.6% 33.7% +12%
Vauxhall 48,775 37.7% 34.2% +10%
Citroen 19,775 38.5% 34.2% +13%
DS 3,353 40.4% 36.3% +11%
Renault 22,333 41.7% 38.6% +8%
Chrysler 319 41.7% 41.2% +1%
Daihatsu 374 43.0% 36.3% +18%
SAAB 1,069 43.7% 39.5% +10%
Dodge 102 44.1% 40.6% +9%
Talbot 140 47.1% 47.1% +0%
Chevrolet 2,099 50.8% 45.1% +13%
Rover 301 52.2% 42.5% +23%
Daewoo 102 64.7% 53.3% +21%
 

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