MOT History from tests of petrol MG Bs year 1966

Review the list of common MG B failures below or to perform a specific mot history check on your MG then use our popular KnowYourCar service

mot history

Pass percent:76.53%

(The average a petrol MG B year 1966 passes without issue)

Based on:6,063 MOT Tests

Most common failures	No# failures
Parking brake: efficiency below requirements \|3.7.B.7\|	279
Headlamp aim out of alignment	183
Windscreen wiper does not clear the windscreen effectively	143
Registration plate lamp issues	139
Brakes imbalanced across an axle	136
Rear parking brake recording little or no effort	135
Horn not working \|1.6.2a\|	112
Rear brake binding	99
Offside Stop lamp not working \|1.2.1b\|	58
Nearside Stop lamp not working \|1.2.1b\|	58
Rear brake application uneven	57
Brake hose excessively deteriorated	45
Service brake: efficiency below requirements \|3.7.B.7\|	38
Nearside Steering rack gaiter split \|2.2.D.2d\|	36
Offside Steering rack gaiter split \|2.2.D.2d\|	35
Offside Headlamp not working on main beam \|1.7.5a\|	34
Offside Rear Suspension spring mounting prescribed area is excessively corroded \|2.4.A.3\|	34
Nearside Headlamp not working on main beam \|1.7.5a\|	33
Fuel system component leaking \|7.2.3\|	33
Nearside Headlamp not working on dipped beam \|1.7.5a\|	31
Stop lamp not working \|1.2.1b\|	27
Offside Headlamp not working on dipped beam \|1.7.5a\|	26
Nearside Rear Suspension spring mounting prescribed area is excessively corroded \|2.4.A.3\|	25
Nearside Front position lamp\|s\| not working \|1.1.A.3b\|	24
Nearside rear brake recording little or no effort \|3.7.B.5a\|	24
Offside rear brake recording little or no effort \|3.7.B.5a\|	23
Parking brake: efficiency below requirements \|3.7.C.1b\|	22
Nearside Front wheel bearing rough when rotated \|2.5.A.2\|	20
Offside Front position lamp\|s\| not working \|1.1.A.3b\|	18
Driver`s door cannot be opened from inside the vehicle \|6.2.B.1b\|	18
Offside Rear Suspension component mounting prescribed area is excessively corroded \|2.4.A.3\|	17
Rear Exhaust system not adequately supported \|7.1.1\|	17
Nearside Rear Suspension component mounting prescribed area is excessively corroded \|2.4.A.3\|	17
Battery insecure \|1.9.1\|	16
Registration plate issues	16
Nearside Front Front position lamp\|s\| not working \|1.1.A.3b\|	15
Parking brake lever has no reserve travel \|3.1.6b\|	15
Front passenger door cannot be opened from inside the vehicle \|6.2.B.1b\|	14
Nearside Rear Stop lamp not working \|1.2.1b\|	14
Offside Rear Stop lamp not working \|1.2.1b\|	14
Nearside Front Headlamp not working on dipped beam \|1.7.5a\|	14
Offside Seat belt anchorage prescribed area is excessively corroded \|5.2.6\|	14
Nearside Front Steering rack gaiter split \|2.2.D.2d\|	14
Offside Front front brake binding \|3.7.B.1\|	13
Offside Front Suspension component mounting prescribed area is excessively corroded \|2.4.A.3\|	13
Windscreen washer not working	13
Offside Front wheel bearing has excessive play \|2.5.A.3c\|	13
Nearside front brake binding \|3.7.B.1\|	12
Brake pipe excessively corroded	12
Rear Exhaust has a major leak of exhaust gases \|7.1.2\|	12
Nearside Front wheel bearing has excessive play \|2.5.A.3c\|	12
Rear Stop lamp not working \|1.2.1b\|	12
Offside front brake binding \|3.7.B.1\|	11
Parking brake efficiency below requirements (1.4.2 (a) (i))	11
Offside Front wheel bearing rough when rotated \|2.5.A.2\|	11
Offside Front Headlamp not working on dipped beam \|1.7.5a\|	11
Nearside Front Headlamp not working on main beam \|1.7.5a\|	11
Brake performance not tested \|3.7.A.1\|	11
Offside Front Brake master cylinder/servo mounting prescribed area is excessively corroded \|3.6.C.3\|	11
Offside Front Shock absorber has a serious fluid leak \|2.7.3\|	10
Steering wheel retaining device insecure \|2.1.6\|	10
Exhaust has a major leak of exhaust gases \|7.1.2\|	10
Nearside Indicator tell tale inoperative \|1.4.A.2a\|	10
Direction indicators not working \|1.4.A.2c\|	10
Offside Rear rear brake recording little or no effort \|3.7.B.5a\|	9
Headlamp switch faulty \|1.7.1\|	9
Offside Rear Shock absorber has a serious fluid leak \|2.7.3\|	9
Brake hose has insufficient room to move	9
Offside Front Axle king pin has excessive play in pin and/or bush adversely affecting the steering \|2.5.A.3a\|	9
Front Windscreen wiper not operating automatically when switched on \|8.2.1b\|	9
Horn not working (7.7 (a) (ii))	8
Nearside Rear rear brake recording little or no effort \|3.7.B.5a\|	8
Offside Steering rack gaiter insecure \|2.2.D.2d\|	8
Brake hose damaged	8
Nearside Front Front wheel bearing has excessive play \|2.5.A.3c\|	8
Offside Front Steering rack gaiter split \|2.2.D.2d\|	8
Front Exhaust has a major leak of exhaust gases \|7.1.2\|	8
Offside Front Front position lamp\|s\| not working \|1.1.A.3b\|	8
Indicator tell tale inoperative \|1.4.A.2a\|	8
Rear Mechanical brake component has restricted free movement	8
Horn not loud enough to be heard by another road user \|1.6.2b\|	7
Front brake application uneven	7
Offside Front Headlamp not working on main beam \|1.7.5a\|	7
Offside Rear Direction indicators not working \|1.4.A.2c\|	7
Windscreen wiper not operating automatically when switched on \|8.2.1b\|	7
Offside Rear Wheel insecure \|4.2.A.1c\|	7
Headlamp not working on main beam \|1.7.5a\|	7
Offside Rear Service brake excessively binding \|1.2.1 \|f\|\|	7
Nearside Rear position lamp\|s\| not working \|1.1.A.3b\|	7
Nearside Rear position lamp\|s\| excessively deteriorated so that it is not visible from a reasonable distance \|1.1.A.3d\|	6
Driver`s seat insecure \|6.2.A.1\|	6
Brake pedal spongy \|3.3.B.1b\|	6
Direction indicators flashing less than 60 times a minute \|1.4.A.2g\|	6
Nearside Rear Shock absorber has a serious fluid leak \|2.7.3\|	6
Offside Track rod end ball joint dust cover excessively deteriorated so that it no longer prevents the ingress of dirt \|2.2.C.1c\|	6
Nearside Front Position lamp not working (4.2.1 (a) (ii))	6
Windscreen wiper blade insecure	6
Offside Headlamp aim beam image obviously incorrect \|1.8.A.1b\|	6
Horn not working \|7.7 \|a\| \|ii\|\|	6
Nearside Seat belt anchorage prescribed area is excessively corroded \|5.2.6\|	6
Offside Rear Vehicle structure has excessive corrosion, seriously affecting its strength within 30cm of the body mountings \|6.1.B.2\|	6
Nearside Rear Seat belt anchorage prescribed area is excessively corroded \|5.2.6\|	6
Main beam `tell-tale` not working \|1.7.4c\|	6
Nearside Front Front wheel bearing rough when rotated \|2.5.A.2\|	6
Offside Front Shock absorber has negligible damping effect \|2.7.5\|	6
Service brake: efficiency below requirements \|3.7.C.1a\|	6
Centre Exhaust has a major leak of exhaust gases \|7.1.2\|	6
Offside Rear Suspension spring mounting prescribed area is inadequately repaired \|2.4.A.3\|	6
Nearside Front Axle king pin has excessive play in pin and/or bush adversely affecting the steering \|2.5.A.3a\|	6
Brake master cylinder/servo mounting prescribed area is excessively corroded \|3.6.C.3\|	6
Parking brake: efficiency below requirements \|3.7.D.4\|	6
Stop lamp(s) all not working (4.3.1 (a) (iii))	6
Stop lamp remains on when the brakes are released	6
Offside Front Front wheel bearing rough when rotated \|2.5.A.2\|	6
Nearside Rear Wheel insecure \|4.2.A.1c\|	6
Rear Fuel system component leaking \|7.2.3\|	6
Nearside Rear Wheel nut\|s\| loose \|4.2.A.1e\|	5
Nearside Front Track rod end ball joint has excessive play \|2.2.B.1f\|	5
Fuel hose leaking \|7.2.3\|	5
Nearside Front passenger door cannot be opened from inside the vehicle \|6.2.B.1b\|	5
Nearside Track rod end ball joint dust cover excessively damaged so that it no longer prevents the ingress of dirt \|2.2.C.1c\|	5
Offside Track rod end ball joint dust cover excessively damaged so that it no longer prevents the ingress of dirt \|2.2.C.1c\|	5
Direction indicators flashing more than 120 times a minute \|1.4.A.2g\|	5
Exhaust system not adequately supported \|7.1.1\|	5
Nearside Front Direction indicator not working \|1.4.A.2c\|	5
Offside Front Vehicle structure has excessive corrosion, seriously affecting its strength within 30cm of the body mountings \|6.1.B.2\|	5
Offside Front Front wheel bearing has excessive play \|2.5.A.3c\|	5
Offside Front Direction indicator not working \|1.4.A.2c\|	5
Offside Rear Direction indicator not working \|1.4.A.2c\|	5
Brake pedal anti-slip provision missing \|3.3.A.1b\|	5
Offside Rear Road wheel spoke excessively loose \|4.2.A.1b\|	5
Nearside Rear Service brake excessively binding (1.2.1 (f))	5
Nearside Front Shock absorber has negligible damping effect \|2.7.5\|	5
Indicator switch faulty \|1.4.A.1\|	5
Offside Rear Suspension component mounting prescribed area is inadequately repaired \|2.4.A.3\|	5
Nearside Front Lower Suspension arm rubber bush deteriorated resulting in excessive movement \|2.4.G.2\|	5
Offside Front Lower Suspension arm rubber bush deteriorated resulting in excessive movement \|2.4.G.2\|	5
Offside Front Seat belt anchorage prescribed area is excessively corroded \|5.2.6\|	5
Parking brake efficiency less than 50% of the required value (1.4.2 (a) (ii))	5
Nearside Front Track rod end ball joint dust cover excessively deteriorated so that it no longer prevents the ingress of dirt \|2.2.C.1c\|	5
Offside Rear Braking system leaking \|3.6.A.1\|	5
Parking brake efficiency below requirements \|1.4.2 \|a\| \|i\|\|	5
Windscreen has damage	5
Nearside Front Suspension component mounting prescribed area is excessively corroded \|2.4.A.3\|	5
Offside Front Wheel insecure \|4.2.A.1c\|	5

We get to these numbers by trawling through over 1 billion MOT test results since 2004 and crunched the numbers. We remove anything to do with Tyres, as they are model independent and group together common non-model specific issues. We are trying to get to a picture of what models have what issues.

Please note: We take the data from the DVSA. This data is raw and can contain typos and spelling mistakes that garages may have entered while recording a MOT result. Specifically miss-match on names of models and makes. We are constantly cleaning the data so bear with the odd issue.

Got suggestions? We’re improving this section all the time. If you have any suggestions, please let us know.

Most common failures	No# failures
Parking brake: efficiency below requirements \|3.7.B.7\|	279
Headlamp aim out of alignment	183
Windscreen wiper does not clear the windscreen effectively	143
Registration plate lamp issues	139
Brakes imbalanced across an axle	136
Rear parking brake recording little or no effort	135
Horn not working \|1.6.2a\|	112
Rear brake binding	99
Offside Stop lamp not working \|1.2.1b\|	58
Nearside Stop lamp not working \|1.2.1b\|	58
Rear brake application uneven	57
Brake hose excessively deteriorated	45
Service brake: efficiency below requirements \|3.7.B.7\|	38
Nearside Steering rack gaiter split \|2.2.D.2d\|	36
Offside Steering rack gaiter split \|2.2.D.2d\|	35
Offside Headlamp not working on main beam \|1.7.5a\|	34
Offside Rear Suspension spring mounting prescribed area is excessively corroded \|2.4.A.3\|	34
Nearside Headlamp not working on main beam \|1.7.5a\|	33
Fuel system component leaking \|7.2.3\|	33
Nearside Headlamp not working on dipped beam \|1.7.5a\|	31
Stop lamp not working \|1.2.1b\|	27
Offside Headlamp not working on dipped beam \|1.7.5a\|	26
Nearside Rear Suspension spring mounting prescribed area is excessively corroded \|2.4.A.3\|	25
Nearside Front position lamp\|s\| not working \|1.1.A.3b\|	24
Nearside rear brake recording little or no effort \|3.7.B.5a\|	24
Offside rear brake recording little or no effort \|3.7.B.5a\|	23
Parking brake: efficiency below requirements \|3.7.C.1b\|	22
Nearside Front wheel bearing rough when rotated \|2.5.A.2\|	20
Offside Front position lamp\|s\| not working \|1.1.A.3b\|	18
Driver`s door cannot be opened from inside the vehicle \|6.2.B.1b\|	18
Offside Rear Suspension component mounting prescribed area is excessively corroded \|2.4.A.3\|	17
Rear Exhaust system not adequately supported \|7.1.1\|	17
Nearside Rear Suspension component mounting prescribed area is excessively corroded \|2.4.A.3\|	17
Battery insecure \|1.9.1\|	16
Registration plate issues	16
Nearside Front Front position lamp\|s\| not working \|1.1.A.3b\|	15
Parking brake lever has no reserve travel \|3.1.6b\|	15
Front passenger door cannot be opened from inside the vehicle \|6.2.B.1b\|	14
Nearside Rear Stop lamp not working \|1.2.1b\|	14
Offside Rear Stop lamp not working \|1.2.1b\|	14
Nearside Front Headlamp not working on dipped beam \|1.7.5a\|	14
Offside Seat belt anchorage prescribed area is excessively corroded \|5.2.6\|	14
Nearside Front Steering rack gaiter split \|2.2.D.2d\|	14
Offside Front front brake binding \|3.7.B.1\|	13
Offside Front Suspension component mounting prescribed area is excessively corroded \|2.4.A.3\|	13
Windscreen washer not working	13
Offside Front wheel bearing has excessive play \|2.5.A.3c\|	13
Nearside front brake binding \|3.7.B.1\|	12
Brake pipe excessively corroded	12
Rear Exhaust has a major leak of exhaust gases \|7.1.2\|	12
Nearside Front wheel bearing has excessive play \|2.5.A.3c\|	12
Rear Stop lamp not working \|1.2.1b\|	12
Offside front brake binding \|3.7.B.1\|	11
Parking brake efficiency below requirements (1.4.2 (a) (i))	11
Offside Front wheel bearing rough when rotated \|2.5.A.2\|	11
Offside Front Headlamp not working on dipped beam \|1.7.5a\|	11
Nearside Front Headlamp not working on main beam \|1.7.5a\|	11
Brake performance not tested \|3.7.A.1\|	11
Offside Front Brake master cylinder/servo mounting prescribed area is excessively corroded \|3.6.C.3\|	11
Offside Front Shock absorber has a serious fluid leak \|2.7.3\|	10
Steering wheel retaining device insecure \|2.1.6\|	10
Exhaust has a major leak of exhaust gases \|7.1.2\|	10
Nearside Indicator tell tale inoperative \|1.4.A.2a\|	10
Direction indicators not working \|1.4.A.2c\|	10
Offside Rear rear brake recording little or no effort \|3.7.B.5a\|	9
Headlamp switch faulty \|1.7.1\|	9
Offside Rear Shock absorber has a serious fluid leak \|2.7.3\|	9
Brake hose has insufficient room to move	9
Offside Front Axle king pin has excessive play in pin and/or bush adversely affecting the steering \|2.5.A.3a\|	9
Front Windscreen wiper not operating automatically when switched on \|8.2.1b\|	9
Horn not working (7.7 (a) (ii))	8
Nearside Rear rear brake recording little or no effort \|3.7.B.5a\|	8
Offside Steering rack gaiter insecure \|2.2.D.2d\|	8
Brake hose damaged	8
Nearside Front Front wheel bearing has excessive play \|2.5.A.3c\|	8
Offside Front Steering rack gaiter split \|2.2.D.2d\|	8
Front Exhaust has a major leak of exhaust gases \|7.1.2\|	8
Offside Front Front position lamp\|s\| not working \|1.1.A.3b\|	8
Indicator tell tale inoperative \|1.4.A.2a\|	8
Rear Mechanical brake component has restricted free movement	8
Horn not loud enough to be heard by another road user \|1.6.2b\|	7
Front brake application uneven	7
Offside Front Headlamp not working on main beam \|1.7.5a\|	7
Offside Rear Direction indicators not working \|1.4.A.2c\|	7
Windscreen wiper not operating automatically when switched on \|8.2.1b\|	7
Offside Rear Wheel insecure \|4.2.A.1c\|	7
Headlamp not working on main beam \|1.7.5a\|	7
Offside Rear Service brake excessively binding \|1.2.1 \|f\|\|	7
Nearside Rear position lamp\|s\| not working \|1.1.A.3b\|	7
Nearside Rear position lamp\|s\| excessively deteriorated so that it is not visible from a reasonable distance \|1.1.A.3d\|	6
Driver`s seat insecure \|6.2.A.1\|	6
Brake pedal spongy \|3.3.B.1b\|	6
Direction indicators flashing less than 60 times a minute \|1.4.A.2g\|	6
Nearside Rear Shock absorber has a serious fluid leak \|2.7.3\|	6
Offside Track rod end ball joint dust cover excessively deteriorated so that it no longer prevents the ingress of dirt \|2.2.C.1c\|	6
Nearside Front Position lamp not working (4.2.1 (a) (ii))	6
Windscreen wiper blade insecure	6
Offside Headlamp aim beam image obviously incorrect \|1.8.A.1b\|	6
Horn not working \|7.7 \|a\| \|ii\|\|	6
Nearside Seat belt anchorage prescribed area is excessively corroded \|5.2.6\|	6
Offside Rear Vehicle structure has excessive corrosion, seriously affecting its strength within 30cm of the body mountings \|6.1.B.2\|	6
Nearside Rear Seat belt anchorage prescribed area is excessively corroded \|5.2.6\|	6
Main beam `tell-tale` not working \|1.7.4c\|	6
Nearside Front Front wheel bearing rough when rotated \|2.5.A.2\|	6
Offside Front Shock absorber has negligible damping effect \|2.7.5\|	6
Service brake: efficiency below requirements \|3.7.C.1a\|	6
Centre Exhaust has a major leak of exhaust gases \|7.1.2\|	6
Offside Rear Suspension spring mounting prescribed area is inadequately repaired \|2.4.A.3\|	6
Nearside Front Axle king pin has excessive play in pin and/or bush adversely affecting the steering \|2.5.A.3a\|	6
Brake master cylinder/servo mounting prescribed area is excessively corroded \|3.6.C.3\|	6
Parking brake: efficiency below requirements \|3.7.D.4\|	6
Stop lamp(s) all not working (4.3.1 (a) (iii))	6
Stop lamp remains on when the brakes are released	6
Offside Front Front wheel bearing rough when rotated \|2.5.A.2\|	6
Nearside Rear Wheel insecure \|4.2.A.1c\|	6
Rear Fuel system component leaking \|7.2.3\|	6
Nearside Rear Wheel nut\|s\| loose \|4.2.A.1e\|	5
Nearside Front Track rod end ball joint has excessive play \|2.2.B.1f\|	5
Fuel hose leaking \|7.2.3\|	5
Nearside Front passenger door cannot be opened from inside the vehicle \|6.2.B.1b\|	5
Nearside Track rod end ball joint dust cover excessively damaged so that it no longer prevents the ingress of dirt \|2.2.C.1c\|	5
Offside Track rod end ball joint dust cover excessively damaged so that it no longer prevents the ingress of dirt \|2.2.C.1c\|	5
Direction indicators flashing more than 120 times a minute \|1.4.A.2g\|	5
Exhaust system not adequately supported \|7.1.1\|	5
Nearside Front Direction indicator not working \|1.4.A.2c\|	5
Offside Front Vehicle structure has excessive corrosion, seriously affecting its strength within 30cm of the body mountings \|6.1.B.2\|	5
Offside Front Front wheel bearing has excessive play \|2.5.A.3c\|	5
Offside Front Direction indicator not working \|1.4.A.2c\|	5
Offside Rear Direction indicator not working \|1.4.A.2c\|	5
Brake pedal anti-slip provision missing \|3.3.A.1b\|	5
Offside Rear Road wheel spoke excessively loose \|4.2.A.1b\|	5
Nearside Rear Service brake excessively binding (1.2.1 (f))	5
Nearside Front Shock absorber has negligible damping effect \|2.7.5\|	5
Indicator switch faulty \|1.4.A.1\|	5
Offside Rear Suspension component mounting prescribed area is inadequately repaired \|2.4.A.3\|	5
Nearside Front Lower Suspension arm rubber bush deteriorated resulting in excessive movement \|2.4.G.2\|	5
Offside Front Lower Suspension arm rubber bush deteriorated resulting in excessive movement \|2.4.G.2\|	5
Offside Front Seat belt anchorage prescribed area is excessively corroded \|5.2.6\|	5
Parking brake efficiency less than 50% of the required value (1.4.2 (a) (ii))	5
Nearside Front Track rod end ball joint dust cover excessively deteriorated so that it no longer prevents the ingress of dirt \|2.2.C.1c\|	5
Offside Rear Braking system leaking \|3.6.A.1\|	5
Parking brake efficiency below requirements \|1.4.2 \|a\| \|i\|\|	5
Windscreen has damage	5
Nearside Front Suspension component mounting prescribed area is excessively corroded \|2.4.A.3\|	5
Offside Front Wheel insecure \|4.2.A.1c\|	5

MOT History from tests of petrol MG Bs year 1966

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