F.A.Q.s ANSWERED

Question: What are the most common causes for failing an mot?

Answer: Department for Tranport statistics
Transport Statistics Great Britain 
Road vehicle testing scheme (MOT): percentage of tests with one or more Fail or PRS1 type RfRs2 in defect group: 2007/08 to 2012/13
Percentage
2010/112011/122012/13
Motorcycles:
Motorcycle body and structure0.9 1.0 0.9
Motorcycle brakes5.3 5.1 5.2
Motorcycle drive system1.4 1.4 1.4
Motorcycle driving controls0.4 0.4 0.5
Motorcycle fuel and exhaust1.4 1.3 1.2
Motorcycle lighting and signalling10.8 11.0 10.8
Motorcycle reg plates and vin1.5 1.4 1.2
Motorcycle sidecar0.0 0.0 0.0
Motorcycle steering and suspension4.9 4.8 4.5
Motorcycle tyres and wheels3.6 3.6 3.5
Cars and other passenger vehicles (up to 12 seats):
Body and structure1.4 1.4 1.4
Brakes10.7 10.4 10.2
Drivers view of the road7.7 7.5 6.9
Driving controls0.0 0.0 0.0
Fuel and exhaust5.5 5.2 4.8
Lighting and signalling18.6 18.6 18.7
Reasons specific to motor tricycles and quadricycles0.0 0.0 0.0
Registration plates and VIN1.2 1.0 0.9
Road wheels0.4 0.4 0.4
Seat belts1.7 1.5 1.4
Steering3.2 3.5 3.4
Suspension11.9 12.2 12.5
Towbars30.1 0.1 0.0
Tyres8.0 7.8 7.7
Private passenger vehicles (more than 12 seats): 
Body and structure4.6 4.6 5.0
Brakes12.1 12.2 12.7
Drivers view of the road6.5 6.2 5.6
Driving controls1.1 1.0 1.0
Fuel and exhaust3.6 3.7 3.4
Lighting and signalling16.7 16.2 17.0
Reg plates and vin0.8 0.6 0.6
Road wheels0.1 0.1 0.1
Seat belts7.1 6.5 6.4
Steering3.6 4.1 4.2
Suspension6.5 6.5 6.9
Towbars30.2 0.1 0.1
Tyres3.7 3.7 3.8
Goods vehicles between 3,000 and 3,500 kg gross weight: 
Body and structure4.8 4.4 4.6
Brakes22.2 21.5 21.8
Drivers view of the road12.1 11.3 10.4
Fuel and exhaust5.8 5.3 4.8
Lighting and signalling29.5 28.8 29.8
Reg plates and vin1.9 1.6 1.4
Road wheels0.3 0.3 0.3
Seat belts3.6 3.1 2.9
Steering7.0 7.5 7.3
Suspension15.4 15.0 15.4
Towbars30.4 0.3 0.3
Tyres7.4 7.2 7.2

1.Pass after Rectification at the Station (PRS). This indicates that a vehicle initially failed its test
It was then repaired within one hour of the test, re-tested and passed.
2.RfR = Reason for Rejection
3.The testing of towbars only became part of the MOT test on 27th April 2009


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