On average, 37.9% of cars will fail their MoT test in Cardiff, which puts the region above the national average of 35.0%. The most common failure causes are Lamps, Reflectors and Electrical Equipment, Suspension and Brakes, while 4.1% will fail on exhaust, fuel and emissions.

Cars registered in 1999 have the worst overall MoT pass rate, at 43.2%. The manufacturers with the highest fail rate in this region are Rover, Talbot and Daewoo. At the opposite end of the scale with the best pass rates are Aston Martin, MINI and Bentley.

Most common reasons for MoT failure

Test Item Failure Rate National Failure Rate Relative Rate
Lamps, Reflectors and Electrical Equipment 18.6% 16.7% +11%
Suspension 14.2% 12.1% +18%
Brakes 11.1% 9.0% +24%
Tyres 9.6% 7.2% +35%
Driver's view of the road 7.4% 6.2% +20%
Exhaust, Fuel and Emissions 4.1% 3.6% +15%
Steering 2.8% 2.3% +23%
Seat Belts and Supplementary Restraint Systems 2.2% 1.6% +33%
Body, Structure and General Items 1.6% 1.1% +46%

MoT failure rates by year of registration

Year of Registration Tests Failure Rate National Failure Rate Relative Rate
2017 64 0.0% 3.6% −100%
2016 111 7.2% 11.6% −38%
2015 1,179 13.1% 13.2% −1%
2014 33,464 15.8% 14.3% +11%
2013 30,298 19.5% 16.9% +15%
2012 26,594 23.9% 20.9% +14%
2011 24,984 28.1% 24.6% +14%
2010 25,811 34.2% 29.2% +17%
2009 24,603 38.0% 32.8% +16%
2008 25,690 43.2% 37.0% +17%
2007 26,936 45.7% 39.6% +15%
2006 23,436 48.6% 42.2% +15%
2005 21,010 51.2% 45.0% +14%
2004 18,929 53.9% 47.4% +14%
2003 15,684 55.2% 48.6% +14%
2002 12,255 56.1% 49.6% +13%
2001 7,862 56.6% 49.6% +14%
2000 4,820 55.4% 49.2% +13%
1999 3,084 56.8% 48.8% +16%
1998 1,952 52.9% 46.8% +13%
1997 1,352 51.3% 45.5% +13%
1996 827 45.8% 44.2% +4%
1995 585 47.4% 42.3% +12%
1994 492 43.3% 41.0% +6%
1993 365 47.1% 40.5% +16%
1992 300 44.0% 39.1% +13%
1991 314 49.0% 38.9% +26%
1990 265 41.9% 37.1% +13%
1989 203 40.9% 35.2% +16%
1988 126 46.8% 35.0% +34%
1987 98 45.9% 34.4% +34%
1986 83 50.6% 34.0% +49%
1985 65 33.8% 33.9% −0%
1984 65 24.6% 32.7% −25%
1983 53 32.1% 32.7% −2%
1971 245 29.0% 24.9% +17%
1970 56 17.9% 23.8% −25%
1969 57 26.3% 24.8% +6%
1968 62 22.6% 23.4% −3%

MoT failure rates by make

Make Tests Failure Rate National Failure Rate Relative Rate
Bentley 133 11.3% 13.2% −15%
MINI 1,352 16.5% 29.3% −44%
Aston Martin 107 19.6% 14.2% +38%
Dacia 768 20.8% 20.3% +3%
Lexus 1,407 22.5% 23.4% −4%
Porsche 1,224 25.8% 19.3% +34%
Audi 14,525 27.2% 25.5% +7%
Triumph 129 28.7% 29.9% −4%
smart 221 29.0% 30.4% −5%
BMW 12,887 30.0% 26.9% +12%
Skoda 5,692 30.1% 28.3% +6%
Toyota 15,337 32.2% 30.1% +7%
Hyundai 9,555 32.7% 29.4% +11%
Land Rover 6,252 33.6% 31.0% +8%
Suzuki 6,857 33.9% 32.4% +5%
Subaru 626 34.3% 32.8% +5%
SEAT 5,047 34.5% 32.6% +6%
Honda 10,091 34.5% 31.1% +11%
Kia 6,706 35.0% 30.7% +14%
Jaguar 3,403 35.3% 31.3% +13%
Mercedes-Benz 9,321 35.8% 30.4% +18%
Volkswagen 34,620 36.6% 33.1% +11%
Mitsubishi 4,480 36.9% 36.4% +1%
Nissan 14,816 37.7% 33.3% +13%
Volvo 5,058 38.6% 35.1% +10%
Mazda 6,440 38.7% 32.2% +20%
Alfa Romeo 1,134 38.7% 36.8% +5%
Isuzu 320 38.8% 43.9% −12%
Jeep 461 39.0% 36.0% +8%
FIAT 10,988 40.0% 36.8% +9%
Ford 72,191 40.5% 35.2% +15%
Daihatsu 548 42.2% 36.1% +17%
MG 749 42.2% 41.7% +1%
Citroen 18,905 42.9% 40.6% +6%
Vauxhall 44,014 43.0% 39.0% +10%
Peugeot 20,648 43.0% 40.4% +7%
SsangYong 131 44.3% 40.4% +10%
SAAB 1,726 44.4% 40.6% +9%
Chrysler 477 45.5% 41.8% +9%
Dodge 126 46.8% 42.4% +10%
Proton 105 47.6% 45.0% +6%
Chevrolet 2,922 48.1% 40.5% +19%
Renault 19,635 51.1% 47.4% +8%
Rover 898 52.0% 47.0% +11%
Talbot 121 57.0% 46.8% +22%
Daewoo 522 63.0% 55.6% +13%
 

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