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.