On average, 26.1% of cars will fail their MoT test in Harrow, which puts the region below the national average of 29.7%. The most common failure causes are Lamps, reflectors and electrical equipment, Visibility and Suspension.
Cars registered in 2003 have the worst overall MoT pass rate, at 60.0%. The manufacturers with the highest fail rate in this region are Rover, Renault and Chevrolet. At the opposite end of the scale with the best pass rates are Porsche, Tesla and Bentley.
| Test Item | Failure Rate | National Failure Rate | Relative Rate |
|---|---|---|---|
| Lamps, reflectors and electrical equipment | 10.9% | 11.9% | −9% |
| Visibility | 5.2% | 5.3% | −2% |
| Suspension | 4.6% | 9.6% | −52% |
| Tyres | 4.5% | 5.8% | −23% |
| Brakes | 4.2% | 7.7% | −46% |
| Noise, emissions and leaks | 2.6% | 3.6% | −27% |
| Body, chassis, structure | 2.4% | 4.1% | −43% |
| Year of Registration | Tests | Failure Rate | National Failure Rate | Relative Rate |
| 2021 | 97 | 14.4% | 17.5% | −18% |
| 2020 | 242 | 8.7% | 16.7% | −48% |
| 2019 | 1,658 | 11.0% | 10.3% | +7% |
| 2018 | 9,600 | 11.2% | 11.7% | −4% |
| 2017 | 11,480 | 11.7% | 13.2% | −11% |
| 2016 | 13,130 | 15.2% | 16.5% | −8% |
| 2015 | 12,526 | 18.0% | 19.5% | −7% |
| 2014 | 11,386 | 19.8% | 23.0% | −14% |
| 2013 | 11,291 | 22.0% | 27.2% | −19% |
| 2012 | 10,751 | 24.5% | 30.5% | −20% |
| 2011 | 10,103 | 28.8% | 33.4% | −14% |
| 2010 | 10,206 | 30.3% | 36.8% | −18% |
| 2009 | 9,923 | 32.4% | 39.1% | −17% |
| 2008 | 9,680 | 34.6% | 41.5% | −17% |
| 2007 | 10,091 | 35.7% | 42.6% | −16% |
| 2006 | 8,161 | 37.0% | 43.9% | −16% |
| 2005 | 6,721 | 38.9% | 44.9% | −13% |
| 2004 | 5,441 | 38.9% | 45.7% | −15% |
| 2003 | 4,111 | 40.0% | 45.6% | −12% |
| 2002 | 3,071 | 38.9% | 45.2% | −14% |
| 2001 | 2,130 | 38.6% | 43.9% | −12% |
| 2000 | 1,293 | 37.2% | 42.5% | −12% |
| 1999 | 792 | 39.0% | 40.8% | −4% |
| 1998 | 555 | 36.0% | 38.5% | −6% |
| 1997 | 361 | 36.0% | 37.5% | −4% |
| 1996 | 225 | 34.7% | 36.5% | −5% |
| 1995 | 151 | 31.8% | 35.3% | −10% |
| 1994 | 105 | 34.3% | 34.4% | −0% |
| 1993 | 83 | 27.7% | 34.7% | −20% |
| 1992 | 69 | 11.6% | 32.9% | −65% |
| 1991 | 115 | 27.8% | 32.3% | −14% |
| 1990 | 113 | 15.9% | 30.9% | −48% |
| 1989 | 95 | 26.3% | 29.6% | −11% |
| 1988 | 54 | 35.2% | 30.2% | +16% |
| 1987 | 53 | 26.4% | 29.5% | −11% |
| Make | Tests | Failure Rate | National Failure Rate | Relative Rate |
|---|---|---|---|---|
| Bentley | 132 | 8.3% | 10.3% | −19% |
| Tesla | 173 | 8.7% | 13.3% | −35% |
| Porsche | 815 | 15.2% | 14.9% | +2% |
| Skoda | 3,054 | 16.2% | 23.5% | −31% |
| Lexus | 2,385 | 18.7% | 18.7% | +0% |
| Land Rover | 2,909 | 18.8% | 25.2% | −25% |
| LTI | 240 | 19.6% | 38.2% | −49% |
| Kia | 3,804 | 21.0% | 26.5% | −21% |
| Audi | 9,314 | 21.1% | 22.3% | −5% |
| BMW | 14,394 | 22.0% | 22.9% | −4% |
| Toyota | 20,679 | 22.9% | 27.1% | −16% |
| Jaguar | 1,831 | 23.0% | 23.9% | −4% |
| Mitsubishi | 1,380 | 23.5% | 28.7% | −18% |
| MINI | 3,635 | 24.7% | 25.5% | −3% |
| Mercedes-Benz | 9,233 | 24.8% | 22.3% | +11% |
| SEAT | 1,612 | 24.8% | 27.1% | −9% |
| Jeep | 303 | 25.4% | 26.1% | −2% |
| Dacia | 176 | 25.6% | 24.7% | +4% |
| smart | 209 | 26.3% | 31.9% | −18% |
| Subaru | 120 | 26.7% | 27.8% | −4% |
| Volkswagen | 19,732 | 27.0% | 29.0% | −7% |
| DS | 244 | 27.0% | 36.3% | −26% |
| Suzuki | 1,491 | 27.4% | 27.5% | −0% |
| Honda | 11,212 | 27.9% | 28.2% | −1% |
| Mazda | 1,758 | 28.0% | 28.2% | −1% |
| Hyundai | 3,441 | 28.5% | 26.1% | +9% |
| Volvo | 1,624 | 28.6% | 28.9% | −1% |
| Nissan | 11,088 | 29.3% | 29.5% | −1% |
| Ford | 20,336 | 29.5% | 31.5% | −6% |
| Chrysler | 216 | 29.6% | 41.2% | −28% |
| FIAT | 2,533 | 30.4% | 32.2% | −5% |
| Peugeot | 5,790 | 30.5% | 34.0% | −10% |
| SAAB | 366 | 30.9% | 39.5% | −22% |
| Citroen | 3,105 | 31.2% | 34.2% | −9% |
| MG | 130 | 32.3% | 28.9% | +12% |
| Alfa Romeo | 369 | 33.6% | 33.7% | −0% |
| Vauxhall | 15,455 | 33.7% | 34.2% | −1% |
| Rover | 139 | 33.8% | 42.5% | −20% |
| Renault | 3,884 | 35.1% | 38.6% | −9% |
| Chevrolet | 460 | 40.0% | 45.1% | −11% |
