Statistical data set
MOT class 3 and 4 vehicles: initial failures by defect category
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| Financial year | Period | Defect category | Overall % of tests | Overall % of defects | Dangerous defects % of tests | Dangerous defects % of defects | Major defects % of tests | Major defects % of defects |
|---|---|---|---|---|---|---|---|---|
| 2019 to 2020 | Quarter 2: July to September | Body, chassis, structure | 4.3% | 6.8% | 0.3% | 2.4% | 4.1% | 7.6% |
| 2019 to 2020 | Quarter 2: July to September | Brakes | 8.1% | 16.8% | 3.1% | 29.3% | 6.1% | 14.4% |
| 2019 to 2020 | Quarter 2: July to September | Identification of the vehicle | 0.5% | 0.7% | 0.0% | 0.0% | 0.5% | 0.8% |
| 2019 to 2020 | Quarter 2: July to September | Lamps, reflectors and electrical equipment | 13.9% | 27.0% | 0.3% | 2.0% | 13.8% | 31.8% |
| 2019 to 2020 | Quarter 2: July to September | Noise, emissions and leaks | 3.6% | 5.6% | 0.1% | 0.5% | 3.5% | 6.5% |
| 2019 to 2020 | Quarter 2: July to September | Road Wheels | 0.3% | 0.6% | 0.1% | 0.6% | 0.3% | 0.6% |
| 2019 to 2020 | Quarter 2: July to September | Seat belts and supplementary restraint systems | 1.3% | 1.9% | 0.0% | 0.3% | 1.3% | 2.3% |
| 2019 to 2020 | Quarter 2: July to September | Steering | 2.0% | 2.9% | 0.1% | 1.1% | 1.9% | 3.2% |
| 2019 to 2020 | Quarter 2: July to September | Suspension | 9.7% | 18.1% | 0.6% | 5.5% | 9.3% | 20.5% |
| 2019 to 2020 | Quarter 2: July to September | Tyres | 6.8% | 11.6% | 5.5% | 58.1% | 1.7% | 2.8% |
| 2019 to 2020 | Quarter 2: July to September | Visibility | 5.3% | 8.0% | 0.0% | 0.2% | 5.3% | 9.5% |
| 2019 to 2020 | Quarter 2: July to September | Overall Initial Failure Rate | 31.7% | 9.1% | 22.6% | |||
| 2019 to 2020 | Quarter 2: July to September | Average defects per Initial Test Failure | 2.59 | 0.41 | 2.18 | |||
| 2019 to 2020 | Quarter 1: April to June | Body, chassis, structure | 4.43% | 6.70% | 0.33% | 2.75% | 4.19% | 7.45% |
| 2019 to 2020 | Quarter 1: April to June | Brakes | 8.30% | 16.64% | 3.14% | 29.08% | 6.25% | 14.28% |
| 2019 to 2020 | Quarter 1: April to June | Buses and coaches supplementary tests | 0.00% | 0.00% | 0.00% | 0.00% | 0.00% | 0.00% |
| 2019 to 2020 | Quarter 1: April to June | Identification of the vehicle | 0.48% | 0.69% | 0.00% | 0.00% | 0.48% | 0.83% |
| 2019 to 2020 | Quarter 1: April to June | Lamps, reflectors and electrical equipment | 14.33% | 26.76% | 0.29% | 2.23% | 14.17% | 31.42% |
| 2019 to 2020 | Quarter 1: April to June | Motorcycle brakes | 0.00% | 0.00% | 0.00% | 0.00% | 0.00% | 0.00% |
| 2019 to 2020 | Quarter 1: April to June | Motorcycle lamps and reflectors | 0.00% | 0.00% | 0.00% | 0.00% | 0.00% | 0.00% |
| 2019 to 2020 | Quarter 1: April to June | Motorcycle tyres | 0.00% | 0.00% | 0.00% | 0.00% | 0.00% | 0.00% |
| 2019 to 2020 | Quarter 1: April to June | Noise, emissions and leaks | 3.70% | 5.58% | 0.07% | 0.51% | 3.66% | 6.55% |
| 2019 to 2020 | Quarter 1: April to June | Road Wheels | 0.35% | 0.56% | 0.06% | 0.56% | 0.29% | 0.55% |
| 2019 to 2020 | Quarter 1: April to June | Seat belt installation check | 0.01% | 0.01% | 0.00% | 0.00% | 0.01% | 0.02% |
| 2019 to 2020 | Quarter 1: April to June | Seat belts and supplementary restraint systems | 1.39% | 1.95% | 0.04% | 0.29% | 1.36% | 2.27% |
| 2019 to 2020 | Quarter 1: April to June | Speedometer and speed limiter | 0.01% | 0.01% | 0.00% | 0.00% | 0.01% | 0.01% |
| 2019 to 2020 | Quarter 1: April to June | Steering | 2.14% | 2.97% | 0.14% | 1.11% | 2.02% | 3.32% |
| 2019 to 2020 | Quarter 1: April to June | Suspension | 10.14% | 18.32% | 0.65% | 5.71% | 9.77% | 20.72% |
| 2019 to 2020 | Quarter 1: April to June | Tyres | 6.82% | 11.19% | 5.61% | 57.55% | 1.46% | 2.39% |
| 2019 to 2020 | Quarter 1: April to June | Visibility | 5.79% | 8.59% | 0.03% | 0.20% | 5.77% | 10.19% |
| 2019 to 2020 | Quarter 1: April to June | Overall Initial Failure Rate | 32.54% | 9.37% | 23.17% | |||
| 2019 to 2020 | Quarter 1: April to June | Average defects per Initial Test Failure | 2.6 | 0.4 | 2.2 | |||
| 2018 to 2019 | 20 May 2018 to 31 March 2019 | Lamps, reflectors and electrical equipment | 12.80% | 26.70% | 0.30% | 2.80% | 12.70% | 31.00% |
| 2018 to 2019 | 20 May 2018 to 31 March 2019 | Suspension | 9.10% | 18.30% | 0.60% | 6.20% | 8.70% | 20.50% |
| 2018 to 2019 | 20 May 2018 to 31 March 2019 | Brakes | 7.50% | 17.00% | 2.80% | 30.70% | 5.70% | 14.60% |
| 2018 to 2019 | 20 May 2018 to 31 March 2019 | Tyres | 5.80% | 10.60% | 4.50% | 53.80% | 1.60% | 2.90% |
| 2018 to 2019 | 20 May 2018 to 31 March 2019 | Visibility | 5.20% | 8.60% | 0.00% | 0.30% | 5.20% | 10.10% |
| 2018 to 2019 | 20 May 2018 to 31 March 2019 | Body, chassis, structure | 4.00% | 6.80% | 0.30% | 3.40% | 3.80% | 7.40% |
| 2018 to 2019 | 20 May 2018 to 31 March 2019 | Noise, emissions and leaks | 3.30% | 5.70% | 0.10% | 0.70% | 3.30% | 6.60% |
| 2018 to 2019 | 20 May 2018 to 31 March 2019 | Steering | 1.90% | 2.90% | 0.10% | 1.20% | 1.80% | 3.20% |
| 2018 to 2019 | 20 May 2018 to 31 March 2019 | Seat belts and supplementary restraint systems | 1.30% | 2.00% | 0.00% | 0.30% | 1.20% | 2.30% |
| 2018 to 2019 | 20 May 2018 to 31 March 2019 | Identification of the vehicle | 0.40% | 0.70% | 0.00% | 0.00% | 0.40% | 0.80% |
| 2018 to 2019 | 20 May 2018 to 31 March 2019 | Road Wheels | 0.30% | 0.50% | 0.10% | 0.60% | 0.30% | 0.50% |
| 2018 to 2019 | 20 May 2018 to 31 March 2019 | Seat belt installation check | 0.00% | 0.00% | 0.00% | 0.00% | 0.00% | 0.00% |
| 2018 to 2019 | 20 May 2018 to 31 March 2019 | Speedometer and speed limiter | 0.00% | 0.00% | 0.00% | 0.00% | 0.00% | 0.00% |
| 2018 to 2019 | 20 May 2018 to 31 March 2019 | Overall Initial Failure Rate | 33.40% | 9.40% | 24.00% | |||
| 2018 to 2019 | 20 May 2018 to 31 March 2019 | Average defects per Initial Test Failure | 2.28 | 0.35 | 1.93 | |||
| 2018 to 2019 | 1 April 2018 to 19 May 2018 | Body and structure | 1.20% | 1.90% | ||||
| 2018 to 2019 | 1 April 2018 to 19 May 2018 | Brakes | 9.60% | 17.90% | ||||
| 2018 to 2019 | 1 April 2018 to 19 May 2018 | Driver's view of the road | 7.20% | 9.50% | ||||
| 2018 to 2019 | 1 April 2018 to 19 May 2018 | Driving controls | 0.00% | 0.00% | ||||
| 2018 to 2019 | 1 April 2018 to 19 May 2018 | Fuel and exhaust | 3.60% | 5.30% | ||||
| 2018 to 2019 | 1 April 2018 to 19 May 2018 | Lighting and signalling | 16.90% | 28.70% | ||||
| 2018 to 2019 | 1 April 2018 to 19 May 2018 | Motor tricycles and quadricycles | 0.00% | 0.00% | ||||
| 2018 to 2019 | 1 April 2018 to 19 May 2018 | Reg plates and VIN | 0.70% | 0.80% | ||||
| 2018 to 2019 | 1 April 2018 to 19 May 2018 | Road wheels | 0.40% | 0.50% | ||||
| 2018 to 2019 | 1 April 2018 to 19 May 2018 | Seat belts | 1.60% | 2.00% | ||||
| 2018 to 2019 | 1 April 2018 to 19 May 2018 | Steering | 2.30% | 2.90% | ||||
| 2018 to 2019 | 1 April 2018 to 19 May 2018 | Suspension | 12.40% | 20.10% | ||||
| 2018 to 2019 | 1 April 2018 to 19 May 2018 | Towbars | 0.00% | 0.00% | ||||
| 2018 to 2019 | 1 April 2018 to 19 May 2018 | Tyres | 7.10% | 10.20% | ||||
| 2018 to 2019 | 1 April 2018 to 19 May 2018 | Overall Initial Failure Rate | 34.90% | |||||
| 2018 to 2019 | 1 April 2018 to 19 May 2018 | Average defects per Initial Test Failure | 2.8 | |||||
| 2017 to 2018 | Body and structure | 1.25% | 1.90% | |||||
| 2017 to 2018 | Brakes | 9.20% | 17.20% | |||||
| 2017 to 2018 | Driver's view of the road | 6.40% | 8.70% | |||||
| 2017 to 2018 | Driving controls | 0.00% | 0.00% | |||||
| 2017 to 2018 | Fuel and exhaust | 3.60% | 5.40% | |||||
| 2017 to 2018 | Lighting and signalling | 17.10% | 29.60% | |||||
| 2017 to 2018 | Motor tricycles and quadricycles | 0.00% | 0.00% | |||||
| 2017 to 2018 | Reg plates and VIN | 0.70% | 0.85% | |||||
| 2017 to 2018 | Road wheels | 0.30% | 0.50% | |||||
| 2017 to 2018 | Seat belts | 1.70% | 2.20% | |||||
| 2017 to 2018 | Steering | 2.40% | 3.00% | |||||
| 2017 to 2018 | Suspension | 12.10% | 20.20% | |||||
| 2017 to 2018 | Towbars | 0.00% | 0.00% | |||||
| 2017 to 2018 | Tyres | 7.10% | 10.40% | |||||
| 2017 to 2018 | Overall Initial Failure Rate | 34.50% | ||||||
| 2017 to 2018 | Average defects per Initial Test Failure | 2.77 | ||||||
| 2016 to 2017 | Body and structure | 1.30% | 2.00% | |||||
| 2016 to 2017 | Brakes | 10.00% | 17.20% | |||||
| 2016 to 2017 | Driver's view of the road | 6.80% | 8.80% | |||||
| 2016 to 2017 | Driving controls | 0.00% | 0.00% | |||||
| 2016 to 2017 | Fuel and exhaust | 4.00% | 5.60% | |||||
| 2016 to 2017 | Lighting and signalling | 18.30% | 29.70% | |||||
| 2016 to 2017 | Motor tricycles and quadricycles | 0.00% | 0.00% | |||||
| 2016 to 2017 | Reg plates and VIN | 0.70% | 0.90% | |||||
| 2016 to 2017 | Road wheels | 0.40% | 0.50% | |||||
| 2016 to 2017 | Seat belts | 1.90% | 2.30% | |||||
| 2016 to 2017 | Steering | 2.60% | 3.10% | |||||
| 2016 to 2017 | Suspension | 12.20% | 19.40% | |||||
| 2016 to 2017 | Towbars | 0.00% | 0.00% | |||||
| 2016 to 2017 | Tyres | 7.40% | 10.50% | |||||
| 2016 to 2017 | Overall Initial Failure Rate | 35.40% | ||||||
| 2016 to 2017 | Average defects per Initial Test Failure | 2.85 | ||||||
| 2015 to 2016 | Body and structure | 1.30% | 2.00% | |||||
| 2015 to 2016 | Brakes | 9.70% | 16.90% | |||||
| 2015 to 2016 | Driver's view of the road | 6.70% | 9.00% | |||||
| 2015 to 2016 | Driving controls | 0.00% | 0.00% | |||||
| 2015 to 2016 | Fuel and exhaust | 4.00% | 5.60% | |||||
| 2015 to 2016 | Lighting and signalling | 17.90% | 29.60% | |||||
| 2015 to 2016 | Motor tricycles and quadricycles | 0.00% | 0.00% | |||||
| 2015 to 2016 | Reg plates and VIN | 0.70% | 0.80% | |||||
| 2015 to 2016 | Road wheels | 0.30% | 0.50% | |||||
| 2015 to 2016 | Seat belts | 1.90% | 2.40% | |||||
| 2015 to 2016 | Steering | 2.70% | 3.20% | |||||
| 2015 to 2016 | Suspension | 12.20% | 19.70% | |||||
| 2015 to 2016 | Towbars | 0.00% | 0.00% | |||||
| 2015 to 2016 | Tyres | 7.10% | 10.10% | |||||
| 2015 to 2016 | Overall Initial Failure Rate | 36.80% | ||||||
| 2015 to 2016 | Average defects per Initial Test Failure | 2.92 | ||||||
| 2014 to 2015 | Body and structure | 1.40% | 2.00% | |||||
| 2014 to 2015 | Brakes | 9.60% | 17.20% | |||||
| 2014 to 2015 | Driver's view of the road | 6.60% | 8.50% | |||||
| 2014 to 2015 | Driving controls | 0.00% | 0.00% | |||||
| 2014 to 2015 | Fuel and exhaust | 4.30% | 5.80% | |||||
| 2014 to 2015 | Lighting and signalling | 18.40% | 30.00% | |||||
| 2014 to 2015 | Motor tricycles and quadricycles | 0.00% | 0.00% | |||||
| 2014 to 2015 | Reg plates and VIN | 0.80% | 0.90% | |||||
| 2014 to 2015 | Road wheels | 0.30% | 0.50% | |||||
| 2014 to 2015 | Seat belts | 2.20% | 2.60% | |||||
| 2014 to 2015 | Steering | 2.90% | 3.40% | |||||
| 2014 to 2015 | Suspension | 12.00% | 18.70% | |||||
| 2014 to 2015 | Towbars | 0.00% | 0.00% | |||||
| 2014 to 2015 | Tyres | 7.40% | 10.00% | |||||
| 2014 to 2015 | Overall Initial Failure Rate | 38.30% | ||||||
| 2014 to 2015 | Average defects per Initial Test Failure | 2.99 | ||||||
| 2013 to 2014 | Body and structure | 1.50% | 1.90% | |||||
| 2013 to 2014 | Brakes | 10.40% | 17.40% | |||||
| 2013 to 2014 | Driver's view of the road | 7.10% | 8.70% | |||||
| 2013 to 2014 | Driving controls | 0.00% | 0.00% | |||||
| 2013 to 2014 | Fuel and exhaust | 4.60% | 5.90% | |||||
| 2013 to 2014 | Lighting and signalling | 19.10% | 29.10% | |||||
| 2013 to 2014 | Motor tricycles and quadricycles | 0.00% | 0.00% | |||||
| 2013 to 2014 | Reg plates and VIN | 0.80% | 0.90% | |||||
| 2013 to 2014 | Road wheels | 0.40% | 0.40% | |||||
| 2013 to 2014 | Seat belts | 2.60% | 2.90% | |||||
| 2013 to 2014 | Steering | 3.30% | 3.60% | |||||
| 2013 to 2014 | Suspension | 12.80% | 18.70% | |||||
| 2013 to 2014 | Towbars | 0.00% | 0.00% | |||||
| 2013 to 2014 | Tyres | 7.80% | 9.90% | |||||
| 2013 to 2014 | Overall Initial Failure Rate | 40.00% | - | |||||
| 2013 to 2014 | Average defects per Initial Test Failure | - | 3.08 |