Statistical data set

MOT class 3 and 4 vehicles: initial failures by defect category

Updated
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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% Not set 9.1% Not set 22.6% Not set
2019 to 2020 Quarter 2: July to September Average defects per Initial Test Failure Not set 2.59 Not set 0.41 Not set 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% Not set 9.37% Not set 23.17% Not set
2019 to 2020 Quarter 1: April to June Average defects per Initial Test Failure Not set 2.6 Not set 0.4 Not set 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% Not set 9.40% Not set 24.00% Not set
2018 to 2019 20 May 2018 to 31 March 2019 Average defects per Initial Test Failure Not set 2.28 Not set 0.35 Not set 1.93
2018 to 2019 1 April 2018 to 19 May 2018 Body and structure 1.20% 1.90% Not set Not set Not set Not set
2018 to 2019 1 April 2018 to 19 May 2018 Brakes 9.60% 17.90% Not set Not set Not set Not set
2018 to 2019 1 April 2018 to 19 May 2018 Driver's view of the road 7.20% 9.50% Not set Not set Not set Not set
2018 to 2019 1 April 2018 to 19 May 2018 Driving controls 0.00% 0.00% Not set Not set Not set Not set
2018 to 2019 1 April 2018 to 19 May 2018 Fuel and exhaust 3.60% 5.30% Not set Not set Not set Not set
2018 to 2019 1 April 2018 to 19 May 2018 Lighting and signalling 16.90% 28.70% Not set Not set Not set Not set
2018 to 2019 1 April 2018 to 19 May 2018 Motor tricycles and quadricycles 0.00% 0.00% Not set Not set Not set Not set
2018 to 2019 1 April 2018 to 19 May 2018 Reg plates and VIN 0.70% 0.80% Not set Not set Not set Not set
2018 to 2019 1 April 2018 to 19 May 2018 Road wheels 0.40% 0.50% Not set Not set Not set Not set
2018 to 2019 1 April 2018 to 19 May 2018 Seat belts 1.60% 2.00% Not set Not set Not set Not set
2018 to 2019 1 April 2018 to 19 May 2018 Steering 2.30% 2.90% Not set Not set Not set Not set
2018 to 2019 1 April 2018 to 19 May 2018 Suspension 12.40% 20.10% Not set Not set Not set Not set
2018 to 2019 1 April 2018 to 19 May 2018 Towbars 0.00% 0.00% Not set Not set Not set Not set
2018 to 2019 1 April 2018 to 19 May 2018 Tyres 7.10% 10.20% Not set Not set Not set Not set
2018 to 2019 1 April 2018 to 19 May 2018 Overall Initial Failure Rate 34.90% Not set Not set Not set Not set Not set
2018 to 2019 1 April 2018 to 19 May 2018 Average defects per Initial Test Failure Not set 2.8 Not set Not set Not set Not set
2017 to 2018 Not set Body and structure 1.25% 1.90% Not set Not set Not set Not set
2017 to 2018 Not set Brakes 9.20% 17.20% Not set Not set Not set Not set
2017 to 2018 Not set Driver's view of the road 6.40% 8.70% Not set Not set Not set Not set
2017 to 2018 Not set Driving controls 0.00% 0.00% Not set Not set Not set Not set
2017 to 2018 Not set Fuel and exhaust 3.60% 5.40% Not set Not set Not set Not set
2017 to 2018 Not set Lighting and signalling 17.10% 29.60% Not set Not set Not set Not set
2017 to 2018 Not set Motor tricycles and quadricycles 0.00% 0.00% Not set Not set Not set Not set
2017 to 2018 Not set Reg plates and VIN 0.70% 0.85% Not set Not set Not set Not set
2017 to 2018 Not set Road wheels 0.30% 0.50% Not set Not set Not set Not set
2017 to 2018 Not set Seat belts 1.70% 2.20% Not set Not set Not set Not set
2017 to 2018 Not set Steering 2.40% 3.00% Not set Not set Not set Not set
2017 to 2018 Not set Suspension 12.10% 20.20% Not set Not set Not set Not set
2017 to 2018 Not set Towbars 0.00% 0.00% Not set Not set Not set Not set
2017 to 2018 Not set Tyres 7.10% 10.40% Not set Not set Not set Not set
2017 to 2018 Not set Overall Initial Failure Rate 34.50% Not set Not set Not set Not set Not set
2017 to 2018 Not set Average defects per Initial Test Failure Not set 2.77 Not set Not set Not set Not set
2016 to 2017 Not set Body and structure 1.30% 2.00% Not set Not set Not set Not set
2016 to 2017 Not set Brakes 10.00% 17.20% Not set Not set Not set Not set
2016 to 2017 Not set Driver's view of the road 6.80% 8.80% Not set Not set Not set Not set
2016 to 2017 Not set Driving controls 0.00% 0.00% Not set Not set Not set Not set
2016 to 2017 Not set Fuel and exhaust 4.00% 5.60% Not set Not set Not set Not set
2016 to 2017 Not set Lighting and signalling 18.30% 29.70% Not set Not set Not set Not set
2016 to 2017 Not set Motor tricycles and quadricycles 0.00% 0.00% Not set Not set Not set Not set
2016 to 2017 Not set Reg plates and VIN 0.70% 0.90% Not set Not set Not set Not set
2016 to 2017 Not set Road wheels 0.40% 0.50% Not set Not set Not set Not set
2016 to 2017 Not set Seat belts 1.90% 2.30% Not set Not set Not set Not set
2016 to 2017 Not set Steering 2.60% 3.10% Not set Not set Not set Not set
2016 to 2017 Not set Suspension 12.20% 19.40% Not set Not set Not set Not set
2016 to 2017 Not set Towbars 0.00% 0.00% Not set Not set Not set Not set
2016 to 2017 Not set Tyres 7.40% 10.50% Not set Not set Not set Not set
2016 to 2017 Not set Overall Initial Failure Rate 35.40% Not set Not set Not set Not set Not set
2016 to 2017 Not set Average defects per Initial Test Failure Not set 2.85 Not set Not set Not set Not set
2015 to 2016 Not set Body and structure 1.30% 2.00% Not set Not set Not set Not set
2015 to 2016 Not set Brakes 9.70% 16.90% Not set Not set Not set Not set
2015 to 2016 Not set Driver's view of the road 6.70% 9.00% Not set Not set Not set Not set
2015 to 2016 Not set Driving controls 0.00% 0.00% Not set Not set Not set Not set
2015 to 2016 Not set Fuel and exhaust 4.00% 5.60% Not set Not set Not set Not set
2015 to 2016 Not set Lighting and signalling 17.90% 29.60% Not set Not set Not set Not set
2015 to 2016 Not set Motor tricycles and quadricycles 0.00% 0.00% Not set Not set Not set Not set
2015 to 2016 Not set Reg plates and VIN 0.70% 0.80% Not set Not set Not set Not set
2015 to 2016 Not set Road wheels 0.30% 0.50% Not set Not set Not set Not set
2015 to 2016 Not set Seat belts 1.90% 2.40% Not set Not set Not set Not set
2015 to 2016 Not set Steering 2.70% 3.20% Not set Not set Not set Not set
2015 to 2016 Not set Suspension 12.20% 19.70% Not set Not set Not set Not set
2015 to 2016 Not set Towbars 0.00% 0.00% Not set Not set Not set Not set
2015 to 2016 Not set Tyres 7.10% 10.10% Not set Not set Not set Not set
2015 to 2016 Not set Overall Initial Failure Rate 36.80% Not set Not set Not set Not set Not set
2015 to 2016 Not set Average defects per Initial Test Failure Not set 2.92 Not set Not set Not set Not set
2014 to 2015 Not set Body and structure 1.40% 2.00% Not set Not set Not set Not set
2014 to 2015 Not set Brakes 9.60% 17.20% Not set Not set Not set Not set
2014 to 2015 Not set Driver's view of the road 6.60% 8.50% Not set Not set Not set Not set
2014 to 2015 Not set Driving controls 0.00% 0.00% Not set Not set Not set Not set
2014 to 2015 Not set Fuel and exhaust 4.30% 5.80% Not set Not set Not set Not set
2014 to 2015 Not set Lighting and signalling 18.40% 30.00% Not set Not set Not set Not set
2014 to 2015 Not set Motor tricycles and quadricycles 0.00% 0.00% Not set Not set Not set Not set
2014 to 2015 Not set Reg plates and VIN 0.80% 0.90% Not set Not set Not set Not set
2014 to 2015 Not set Road wheels 0.30% 0.50% Not set Not set Not set Not set
2014 to 2015 Not set Seat belts 2.20% 2.60% Not set Not set Not set Not set
2014 to 2015 Not set Steering 2.90% 3.40% Not set Not set Not set Not set
2014 to 2015 Not set Suspension 12.00% 18.70% Not set Not set Not set Not set
2014 to 2015 Not set Towbars 0.00% 0.00% Not set Not set Not set Not set
2014 to 2015 Not set Tyres 7.40% 10.00% Not set Not set Not set Not set
2014 to 2015 Not set Overall Initial Failure Rate 38.30% Not set Not set Not set Not set Not set
2014 to 2015 Not set Average defects per Initial Test Failure Not set 2.99 Not set Not set Not set Not set
2013 to 2014 Not set Body and structure 1.50% 1.90% Not set Not set Not set Not set
2013 to 2014 Not set Brakes 10.40% 17.40% Not set Not set Not set Not set
2013 to 2014 Not set Driver's view of the road 7.10% 8.70% Not set Not set Not set Not set
2013 to 2014 Not set Driving controls 0.00% 0.00% Not set Not set Not set Not set
2013 to 2014 Not set Fuel and exhaust 4.60% 5.90% Not set Not set Not set Not set
2013 to 2014 Not set Lighting and signalling 19.10% 29.10% Not set Not set Not set Not set
2013 to 2014 Not set Motor tricycles and quadricycles 0.00% 0.00% Not set Not set Not set Not set
2013 to 2014 Not set Reg plates and VIN 0.80% 0.90% Not set Not set Not set Not set
2013 to 2014 Not set Road wheels 0.40% 0.40% Not set Not set Not set Not set
2013 to 2014 Not set Seat belts 2.60% 2.90% Not set Not set Not set Not set
2013 to 2014 Not set Steering 3.30% 3.60% Not set Not set Not set Not set
2013 to 2014 Not set Suspension 12.80% 18.70% Not set Not set Not set Not set
2013 to 2014 Not set Towbars 0.00% 0.00% Not set Not set Not set Not set
2013 to 2014 Not set Tyres 7.80% 9.90% Not set Not set Not set Not set
2013 to 2014 Not set Overall Initial Failure Rate 40.00% - Not set Not set Not set Not set
2013 to 2014 Not set Average defects per Initial Test Failure - 3.08 Not set Not set Not set Not set