DVSA's data further found that 12.2% of MOT test results in 2021-22 were incorrect, and that 2.1% of cars that officially failed the test should have been issued a pass certificate.
MOT (Ministry of Transport) is a legal requirement for car owners, where a garage assesses whether a vehicle is safe to drive on the public road.
The survey has shown that nearly 1.3 million vehicles are now potentially unsafe and potentially illegally being driven on roads across the country.
This is because those that shouldn't have passed may have dangerous issues that can lead to accidents.
According to the official documentation, the DVSA retest a random number of vehicles to double check if the MOT has been correctly carried out and given the right verdict.
In 2022, 1,732 MOT tested cars were re-examined by mechanics at the DVSA.
Shockingly, out of the vehicles retested, 65.9% of the vehicles were found to have at least one defect which the MOT test station had either incorrectly examined, missed, or recorded under something else.
Further analysis showed that 51.6% had three or more defects missed or issues that the DVSA's team of examiners disagreed with from the original assessment.
A recent study from the RAC found that around 7.3 million vehicles on the road fail their MOT each year.