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