Statistical data set
Top 10 prohibition defects as a percentage of all HGV trailers inspected at roadside and operators' premises
Updated 4 April 2024
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| Financial year | Period | Defect type | Defects as a percentage of all vehicles inspected |
|---|---|---|---|
| 2023 to 2024 | Quarter 3: October to December | Condition of Tyres | 10.39% |
| 2023 to 2024 | Quarter 3: October to December | Brake Systems and Components | 6.03% |
| 2023 to 2024 | Quarter 3: October to December | Suspension | 3.20% |
| 2023 to 2024 | Quarter 3: October to December | Road Wheels and Hubs | 3.13% |
| 2023 to 2024 | Quarter 3: October to December | Spray Suppression, Wings and Wheel Arches | 3.09% |
| 2023 to 2024 | Quarter 3: October to December | Lamps | 2.92% |
| 2023 to 2024 | Quarter 3: October to December | Parking Brake Performance | 2.58% |
| 2023 to 2024 | Quarter 3: October to December | Service Brake Operation | 2.27% |
| 2023 to 2024 | Quarter 3: October to December | Service Brake Performance | 2.27% |
| 2023 to 2024 | Quarter 3: October to December | Security of Body | 2.05% |
| 2023 to 2024 | Quarter 2: July to September | Condition of Tyres | 13.15% |
| 2023 to 2024 | Quarter 2: July to September | Brake Systems and Components | 6.31% |
| 2023 to 2024 | Quarter 2: July to September | Suspension | 3.25% |
| 2023 to 2024 | Quarter 2: July to September | Spray Suppression, Wings and Wheel Arches | 3.19% |
| 2023 to 2024 | Quarter 2: July to September | Parking Brake Performance | 2.24% |
| 2023 to 2024 | Quarter 2: July to September | Road Wheels and Hubs | 2.17% |
| 2023 to 2024 | Quarter 2: July to September | Service Brake Operation | 2.10% |
| 2023 to 2024 | Quarter 2: July to September | Lamps | 2.00% |
| 2023 to 2024 | Quarter 2: July to September | Service Brake Performance | 1.72% |
| 2023 to 2024 | Quarter 2: July to September | Security of Body | 1.56% |
| 2023 to 2024 | Quarter 1: April to June | Condition of Tyres | 13.74% |
| 2023 to 2024 | Quarter 1: April to June | Brake Systems and Components | 6.89% |
| 2023 to 2024 | Quarter 1: April to June | Suspension | 3.56% |
| 2023 to 2024 | Quarter 1: April to June | Spray Suppression, Wings and Wheel Arches | 3.32% |
| 2023 to 2024 | Quarter 1: April to June | Parking Brake Performance | 3.06% |
| 2023 to 2024 | Quarter 1: April to June | Road Wheels and Hubs | 2.44% |
| 2023 to 2024 | Quarter 1: April to June | Service Brake Operation | 2.36% |
| 2023 to 2024 | Quarter 1: April to June | Lamps | 2.32% |
| 2023 to 2024 | Quarter 1: April to June | Security of Body | 2.24% |
| 2023 to 2024 | Quarter 1: April to June | Service Brake Performance | 2.15% |
| 2022 to 2023 | Quarter 4: January to March | Condition of Tyres | 10.62% |
| 2022 to 2023 | Quarter 4: January to March | Brake Systems and Components | 5.64% |
| 2022 to 2023 | Quarter 4: January to March | Lamps | 3.48% |
| 2022 to 2023 | Quarter 4: January to March | Spray Suppression, Wings and Wheel Arches | 3.39% |
| 2022 to 2023 | Quarter 4: January to March | Suspension | 3.27% |
| 2022 to 2023 | Quarter 4: January to March | Service Brake Operation | 2.47% |
| 2022 to 2023 | Quarter 4: January to March | Parking Brake Performance | 2.39% |
| 2022 to 2023 | Quarter 4: January to March | Service Brake Performance | 2.32% |
| 2022 to 2023 | Quarter 4: January to March | Road Wheels and Hubs | 2.29% |
| 2022 to 2023 | Quarter 4: January to March | Security of Body | 1.96% |
| 2022 to 2023 | Quarter 3: October to December | Condition of Tyres | 9.28% |
| 2022 to 2023 | Quarter 3: October to December | Brake Systems and Components | 5.35% |
| 2022 to 2023 | Quarter 3: October to December | Spray Suppression, Wings and Wheel Arches | 3.45% |
| 2022 to 2023 | Quarter 3: October to December | Suspension | 3.09% |
| 2022 to 2023 | Quarter 3: October to December | Lamps | 2.81% |
| 2022 to 2023 | Quarter 3: October to December | Road Wheels and Hubs | 2.81% |
| 2022 to 2023 | Quarter 3: October to December | Service Brake Operation | 2.52% |
| 2022 to 2023 | Quarter 3: October to December | Security of Body | 2.16% |
| 2022 to 2023 | Quarter 3: October to December | Parking Brake Performance | 1.54% |
| 2022 to 2023 | Quarter 3: October to December | Service Brake Performance | 1.42% |
| 2022 to 2023 | Quarter 2: July to September | Condition of Tyres | 10.31% |
| 2022 to 2023 | Quarter 2: July to September | Brake Systems and Components | 5.73% |
| 2022 to 2023 | Quarter 2: July to September | Spray Suppression, Wings and Wheel Arches | 3.58% |
| 2022 to 2023 | Quarter 2: July to September | Suspension | 3.09% |
| 2022 to 2023 | Quarter 2: July to September | Parking Brake Performance | 2.55% |
| 2022 to 2023 | Quarter 2: July to September | Lamps | 2.37% |
| 2022 to 2023 | Quarter 2: July to September | Service Brake Operation | 2.03% |
| 2022 to 2023 | Quarter 2: July to September | Service Brake Performance | 1.93% |
| 2022 to 2023 | Quarter 2: July to September | Road Wheels and Hubs | 1.80% |
| 2022 to 2023 | Quarter 2: July to September | Security of Body | 1.55% |
| 2022 to 2023 | Quarter 1: April to June | Condition of Tyres | 10.22% |
| 2022 to 2023 | Quarter 1: April to June | Brake Systems and Components | 6.05% |
| 2022 to 2023 | Quarter 1: April to June | Spray Suppression, Wings and Wheel Arches | 3.62% |
| 2022 to 2023 | Quarter 1: April to June | Suspension | 3.40% |
| 2022 to 2023 | Quarter 1: April to June | Lamps | 3.05% |
| 2022 to 2023 | Quarter 1: April to June | Parking Brake Performance | 2.16% |
| 2022 to 2023 | Quarter 1: April to June | Road Wheels and Hubs | 2.13% |
| 2022 to 2023 | Quarter 1: April to June | Service Brake Performance | 1.90% |
| 2022 to 2023 | Quarter 1: April to June | Service Brake Operation | 1.85% |
| 2022 to 2023 | Quarter 1: April to June | Security of Body | 1.50% |
| 2021 to 2022 | Quarter 4: January to March | Condition of Tyres | 8.04% |
| 2021 to 2022 | Quarter 4: January to March | Brake Systems and Components | 5.82% |
| 2021 to 2022 | Quarter 4: January to March | Lamps | 3.23% |
| 2021 to 2022 | Quarter 4: January to March | Spray Suppression, Wings and Wheel Arches | 3.11% |
| 2021 to 2022 | Quarter 4: January to March | Suspension | 2.71% |
| 2021 to 2022 | Quarter 4: January to March | Road Wheels and Hubs | 2.41% |
| 2021 to 2022 | Quarter 4: January to March | Parking Brake Performance | 2.22% |
| 2021 to 2022 | Quarter 4: January to March | Service Brake Performance | 2.07% |
| 2021 to 2022 | Quarter 4: January to March | Direction Indicators and Hazard Warning Lamps | 1.71% |
| 2021 to 2022 | Quarter 4: January to March | Service Brake Operation | 1.66% |
| 2021 to 2022 | Quarter 3: October to December | Condition of Tyres | 7.46% |
| 2021 to 2022 | Quarter 3: October to December | Brake Systems and Components | 5.50% |
| 2021 to 2022 | Quarter 3: October to December | Spray Suppression, Wings and Wheel Arches | 3.64% |
| 2021 to 2022 | Quarter 3: October to December | Lamps | 2.73% |
| 2021 to 2022 | Quarter 3: October to December | Suspension | 2.65% |
| 2021 to 2022 | Quarter 3: October to December | Road Wheels and Hubs | 2.40% |
| 2021 to 2022 | Quarter 3: October to December | Parking Brake Performance | 1.73% |
| 2021 to 2022 | Quarter 3: October to December | Service Brake Performance | 1.63% |
| 2021 to 2022 | Quarter 3: October to December | Service Brake Operation | 1.33% |
| 2021 to 2022 | Quarter 3: October to December | Direction Indicators and Hazard Warning lamps | 1.32% |
| 2021 to 2022 | Quarter 2: July to September | Condition of Tyres | 8.85% |
| 2021 to 2022 | Quarter 2: July to September | Brake Systems and Components | 6.11% |
| 2021 to 2022 | Quarter 2: July to September | Suspension | 3.72% |
| 2021 to 2022 | Quarter 2: July to September | Spray Suppression, Wings and Wheel Arches | 3.63% |
| 2021 to 2022 | Quarter 2: July to September | Lamps | 2.41% |
| 2021 to 2022 | Quarter 2: July to September | Parking Brake Performance | 2.18% |
| 2021 to 2022 | Quarter 2: July to September | Road Wheels and Hubs | 2.15% |
| 2021 to 2022 | Quarter 2: July to September | Service Brake Performance | 2.03% |
| 2021 to 2022 | Quarter 2: July to September | Service Brake Operation | 1.60% |
| 2021 to 2022 | Quarter 2: July to September | Security of Body | 1.53% |
| 2021 to 2022 | Quarter 1: April to June | Condition of Tyres | 9.01% |
| 2021 to 2022 | Quarter 1: April to June | Brake Systems and Components | 6.39% |
| 2021 to 2022 | Quarter 1: April to June | Spray Suppression, Wings and Wheel Arches | 4.47% |
| 2021 to 2022 | Quarter 1: April to June | Suspension | 3.72% |
| 2021 to 2022 | Quarter 1: April to June | Lamps | 2.63% |
| 2021 to 2022 | Quarter 1: April to June | Parking Brake Performance | 2.08% |
| 2021 to 2022 | Quarter 1: April to June | Road Wheels and Hubs | 2.01% |
| 2021 to 2022 | Quarter 1: April to June | Service Brake Performance | 1.94% |
| 2021 to 2022 | Quarter 1: April to June | Service Brake Operation | 1.62% |
| 2021 to 2022 | Quarter 1: April to June | Security of Body | 1.40% |
| 2020 to 2021 | Quarter 4: January to March | Condition of Tyres | 6.94% |
| 2020 to 2021 | Quarter 4: January to March | Brake Systems and Components | 5.16% |
| 2020 to 2021 | Quarter 4: January to March | Lamps | 2.77% |
| 2020 to 2021 | Quarter 4: January to March | Spray Suppression, Wings and Wheel Arches | 2.53% |
| 2020 to 2021 | Quarter 4: January to March | Suspension | 2.45% |
| 2020 to 2021 | Quarter 4: January to March | Road Wheels and Hubs | 1.70% |
| 2020 to 2021 | Quarter 4: January to March | Service Brake Performance | 1.57% |
| 2020 to 2021 | Quarter 4: January to March | Direction Indicators and Hazard Warning lamps | 1.25% |
| 2020 to 2021 | Quarter 4: January to March | Parking Brake Performance | 1.15% |
| 2020 to 2021 | Quarter 4: January to March | Security of Body | 0.91% |
| 2020 to 2021 | Quarter 3: October to December | Condition of Tyres | 7.70% |
| 2020 to 2021 | Quarter 3: October to December | Brake Systems and Components | 5.50% |
| 2020 to 2021 | Quarter 3: October to December | Spray Suppression, Wings and Wheel Arches | 4.05% |
| 2020 to 2021 | Quarter 3: October to December | Lamps | 3.32% |
| 2020 to 2021 | Quarter 3: October to December | Suspension | 3.11% |
| 2020 to 2021 | Quarter 3: October to December | Road Wheels and Hubs | 2.73% |
| 2020 to 2021 | Quarter 3: October to December | Parking Brake Performance | 1.90% |
| 2020 to 2021 | Quarter 3: October to December | Service Brake Operation | 1.65% |
| 2020 to 2021 | Quarter 3: October to December | Service Brake Performance | 1.57% |
| 2020 to 2021 | Quarter 3: October to December | Security of Body | 1.42% |
| 2020 to 2021 | Quarter 2: July to September | Condition of Tyres | 11.32% |
| 2020 to 2021 | Quarter 2: July to September | Brake Systems and Components | 5.61% |
| 2020 to 2021 | Quarter 2: July to September | Suspension | 2.77% |
| 2020 to 2021 | Quarter 2: July to September | Spray Suppression, Wings and Wheel Arches | 2.69% |
| 2020 to 2021 | Quarter 2: July to September | Lamps | 1.93% |
| 2020 to 2021 | Quarter 2: July to September | Road Wheels and Hubs | 1.87% |
| 2020 to 2021 | Quarter 2: July to September | Service Brake Performance | 1.83% |
| 2020 to 2021 | Quarter 2: July to September | Security of Body | 1.54% |
| 2020 to 2021 | Quarter 2: July to September | Parking Brake Performance | 1.43% |
| 2020 to 2021 | Quarter 2: July to September | Service Brake Operation | 1.41% |
| 2020 to 2021 | Quarter 1: April to June | Condition of Tyres | 15.24% |
| 2020 to 2021 | Quarter 1: April to June | Brake Systems and Components | 3.92% |
| 2020 to 2021 | Quarter 1: April to June | Security of Body | 2.67% |
| 2020 to 2021 | Quarter 1: April to June | Suspension | 2.57% |
| 2020 to 2021 | Quarter 1: April to June | Service Brake Performance | 1.99% |
| 2020 to 2021 | Quarter 1: April to June | Road Wheels and Hubs | 1.84% |
| 2020 to 2021 | Quarter 1: April to June | Lamps | 1.52% |
| 2020 to 2021 | Quarter 1: April to June | Direction Indicators and Hazard Warning lamps | 1.07% |
| 2020 to 2021 | Quarter 1: April to June | Trailer Parking and Emergency Brakes and Air Line Connections | 0.72% |
| 2020 to 2021 | Quarter 1: April to June | Parking Brake Performance | 0.64% |
| 2019 to 2020 | Quarter 4: January to March | Brake Systems and Components | 11.10% |
| 2019 to 2020 | Quarter 4: January to March | Condition of Tyres | 10.20% |
| 2019 to 2020 | Quarter 4: January to March | Spray Suppression, Wings and Wheel Arches | 7.10% |
| 2019 to 2020 | Quarter 4: January to March | Suspension | 5.60% |
| 2019 to 2020 | Quarter 4: January to March | Lamps | 5.20% |
| 2019 to 2020 | Quarter 4: January to March | Service Brake Operation | 3.20% |
| 2019 to 2020 | Quarter 4: January to March | Parking Brake Performance | 3.00% |
| 2019 to 2020 | Quarter 4: January to March | Service Brake Performance | 2.90% |
| 2019 to 2020 | Quarter 4: January to March | Road Wheels and Hubs | 2.90% |
| 2019 to 2020 | Quarter 4: January to March | Direction Indicators and Hazard Warning Lamps | 2.00% |
| 2019 to 2020 | Quarter 3: October to December | Brake Systems and Components | 6.90% |
| 2019 to 2020 | Quarter 3: October to December | Suspension | 3.40% |
| 2019 to 2020 | Quarter 3: October to December | Spray Suppression, Wings and Wheel Arches | 4.30% |
| 2019 to 2020 | Quarter 3: October to December | Condition of Tyres | 7.40% |
| 2019 to 2020 | Quarter 3: October to December | Service Brake Operation | 3.00% |
| 2019 to 2020 | Quarter 3: October to December | Road Wheels and Hubs | 3.00% |
| 2019 to 2020 | Quarter 3: October to December | Parking Brake Performance | 2.00% |
| 2019 to 2020 | Quarter 3: October to December | Service Brake Performance | 1.70% |
| 2019 to 2020 | Quarter 3: October to December | Lamps | 2.90% |
| 2019 to 2020 | Quarter 3: October to December | Security of body | 1.40% |
| 2019 to 2020 | Quarter 2: July to September | Brake Systems and Components | 6.80% |
| 2019 to 2020 | Quarter 2: July to September | Suspension | 3.50% |
| 2019 to 2020 | Quarter 2: July to September | Spray Suppression, Wings and Wheel Arches | 4.60% |
| 2019 to 2020 | Quarter 2: July to September | Condition of Tyres | 8.70% |
| 2019 to 2020 | Quarter 2: July to September | Service Brake Operation | 3.00% |
| 2019 to 2020 | Quarter 2: July to September | Road Wheels and Hubs | 2.40% |
| 2019 to 2020 | Quarter 2: July to September | Parking Brake Performance | 1.50% |
| 2019 to 2020 | Quarter 2: July to September | Service Brake Performance | 1.40% |
| 2019 to 2020 | Quarter 2: July to September | Lamps | 2.30% |
| 2019 to 2020 | Quarter 2: July to September | Direction Indicators and Warning Lamps | 1.00% |
| 2019 to 2020 | Quarter 1: April to June | Brake Systems and Components | 8.27% |
| 2019 to 2020 | Quarter 1: April to June | Suspension | 4.72% |
| 2019 to 2020 | Quarter 1: April to June | Spray Suppression, Wings and Wheel Arches | 4.99% |
| 2019 to 2020 | Quarter 1: April to June | Condition of Tyres | 9.10% |
| 2019 to 2020 | Quarter 1: April to June | Service Brake Operation | 3.17% |
| 2019 to 2020 | Quarter 1: April to June | Road Wheels and Hubs | 2.20% |
| 2019 to 2020 | Quarter 1: April to June | Parking Brake Performance | 2.01% |
| 2019 to 2020 | Quarter 1: April to June | Service Brake Performance | 1.85% |
| 2019 to 2020 | Quarter 1: April to June | Lamps | 2.48% |
| 2019 to 2020 | Quarter 1: April to June | Security of Body | 1.21% |
| 2018 to 2019 | Total | Brake Systems and Components | 9.60% |
| 2018 to 2019 | Total | Condition of Tyres | 7.90% |
| 2018 to 2019 | Total | Suspension | 5.00% |
| 2018 to 2019 | Total | Spray Suppression, Wings and Wheel Arches | 5.00% |
| 2018 to 2019 | Total | Service Brake Operation | 3.70% |
| 2018 to 2019 | Total | Lamps | 2.70% |
| 2018 to 2019 | Total | Road Wheels and Hubs | 2.40% |
| 2018 to 2019 | Total | Parking Brake Performance | 2.20% |
| 2018 to 2019 | Total | Service Brake Performance | 1.90% |
| 2018 to 2019 | Total | Security of Body | 1.40% |
| 2017 to 2018 | Total | Brake Systems and Components | 9.70% |
| 2017 to 2018 | Total | Suspension | 4.80% |
| 2017 to 2018 | Total | Condition of Tyres | 4.80% |
| 2017 to 2018 | Total | Spray Suppression & Wings & Wheel Arches | 4.70% |
| 2017 to 2018 | Total | Service Brake Operation | 4.10% |
| 2017 to 2018 | Total | Road Wheels and Hubs | 2.60% |
| 2017 to 2018 | Total | Parking Brake Performance | 2.10% |
| 2017 to 2018 | Total | Service Brake Performance | 2.00% |
| 2017 to 2018 | Total | Lamps | 1.60% |
| 2017 to 2018 | Total | Security of Body | 1.40% |
| 2016 to 2017 | Total | Brake Systems and Components | 10.40% |
| 2016 to 2017 | Total | Suspension | 5.70% |
| 2016 to 2017 | Total | Condition of Tyres | 5.30% |
| 2016 to 2017 | Total | Spray Suppression & Wings & Wheel Arches | 5.10% |
| 2016 to 2017 | Total | Service Brake Operation | 4.80% |
| 2016 to 2017 | Total | Road Wheels and Hubs | 3.10% |
| 2016 to 2017 | Total | Parking Brake Performance | 1.90% |
| 2016 to 2017 | Total | Service Brake Performance | 1.80% |
| 2016 to 2017 | Total | Lamps | 1.70% |
| 2016 to 2017 | Total | Security of Body | 1.30% |
| 2015 to 2016 | Total | Brake Systems and Components | 12.60% |
| 2015 to 2016 | Total | Suspension | 6.70% |
| 2015 to 2016 | Total | Condition of Tyres | 6.20% |
| 2015 to 2016 | Total | Spray Suppression & Wings & Wheel Arches | 6.50% |
| 2015 to 2016 | Total | Service Brake Operation | 5.00% |
| 2015 to 2016 | Total | Road Wheels and Hubs | 3.50% |
| 2015 to 2016 | Total | Service Brake Performance | 1.60% |
| 2015 to 2016 | Total | Lamps | 2.00% |
| 2015 to 2016 | Total | Security of Body | 2.00% |
| 2015 to 2016 | Total | Parking Brake Performance | 1.20% |
| 2014 to 2015 | Total | Brake Systems and Components | 12.80% |
| 2014 to 2015 | Total | Suspension | 6.90% |
| 2014 to 2015 | Total | Condition of Tyres | 6.50% |
| 2014 to 2015 | Total | Spray Suppression & Wings & Wheel Arches | 5.60% |
| 2014 to 2015 | Total | Service Brake Operation | 5.00% |
| 2014 to 2015 | Total | Road Wheels and Hubs | 3.30% |
| 2014 to 2015 | Total | Service Brake Performance | 1.80% |
| 2014 to 2015 | Total | Lamps | 2.00% |
| 2014 to 2015 | Total | Security of Body | 1.60% |
| 2014 to 2015 | Total | Parking Brake Performance | 1.10% |
| 2013 to 2014 | Total | Brake Systems and Components | 13.60% |
| 2013 to 2014 | Total | Suspension | 7.00% |
| 2013 to 2014 | Total | Condition of Tyres | 7.20% |
| 2013 to 2014 | Total | Spray Suppression & Wings & Wheel Arches | 5.50% |
| 2013 to 2014 | Total | Service Brake Operation | 5.40% |
| 2013 to 2014 | Total | Road Wheels and Hubs | 3.40% |
| 2013 to 2014 | Total | Service Brake Performance | 1.90% |
| 2013 to 2014 | Total | Lamps | 2.20% |
| 2013 to 2014 | Total | Security of Body | 1.90% |
| 2013 to 2014 | Total | Parking Brake Performance | 0.90% |