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MOT History from tests of petrol MG Bs year 1980

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:67.32%
(The average a petrol MG B year 1980 passes without issue)
Based on:4,893 MOT Tests
Most common failuresNo# failures
Exhaust emissions carbon monoxide content excessive |7.3.B.1a|319
Headlamp aim out of alignment266
Exhaust emissions hydrocarbon content excessive |7.3.B.1b|145
Windscreen wiper does not clear the windscreen effectively135
Registration plate lamp issues133
Brakes imbalanced across an axle112
Rear brake binding110
Parking brake: efficiency below requirements |3.7.B.7|76
Rear parking brake recording little or no effort62
Brake hose excessively deteriorated58
Offside Rear fog lamp not working |1.3.2b|56
Rear brake application uneven51
Nearside Stop lamp not working |1.2.1b|50
Offside Stop lamp not working |1.2.1b|46
Offside Rear Suspension spring mounting prescribed area is excessively corroded |2.4.A.3|43
Horn not working |1.6.2a|43
Nearside Rear Suspension spring mounting prescribed area is excessively corroded |2.4.A.3|39
Offside Steering rack gaiter split |2.2.D.2d|38
Brake pipe excessively corroded37
Registration plate issues36
Exhaust emissions carbon monoxide content excessive (8.2.1.2 (b))35
Nearside Steering rack gaiter split |2.2.D.2d|31
Hazard warning switch faulty |1.4.B.1d|31
All position lamps not working |1.1.A.3b|30
Parking brake lever has no reserve travel |3.1.6b|30
Service brake: efficiency below requirements |3.7.B.7|29
Rear fog lamp tell tale not working |1.3.1b|29
Direction indicators not working |1.4.A.2c|28
Offside Front position lamp|s| not working |1.1.A.3b|28
Nearside Front position lamp|s| not working |1.1.A.3b|28
Rear fog lamp not working |1.3.2b|28
Offside Rear Suspension component mounting prescribed area is excessively corroded |2.4.A.3|27
Nearside Headlamp not working on main beam |1.7.5a|26
Nearside Headlamp not working on dipped beam |1.7.5a|25
Offside Rear Rear fog lamp not working |1.3.2b|24
Nearside rear brake recording little or no effort |3.7.B.5a|23
Windscreen washer not working 23
Offside Headlamp not working on dipped beam |1.7.5a|22
Offside rear brake recording little or no effort |3.7.B.5a|21
Nearside Rear Suspension component mounting prescribed area is excessively corroded |2.4.A.3|21
Fuel system component leaking |7.2.3|20
Exhaust emissions carbon monoxide content excessive |8.2.1.2 |b||19
Rear Exhaust has a major leak of exhaust gases |7.1.2|18
Direction indicators flashing less than 60 times a minute |1.4.A.2g|18
Offside Headlamp not working on main beam |1.7.5a|18
Rear Exhaust system not adequately supported |7.1.1|18
Hazard warning lamps inoperative |1.4.B.1b|17
Hazard warning lamps not flashing in phase, with ignition on |1.4.B.1f|17
Hazard warning lamps not flashing in phase, with ignition off |1.4.B.1f|17
Exhaust emissions hydrocarbon content excessive (8.2.1.2 (b))16
Offside Rear fog lamp missing |1.3.2a|15
Offside Seat belt anchorage prescribed area is excessively corroded |5.2.6|15
Nearside Rear Stop lamp not working |1.2.1b|15
Nearside Rear Shock absorber has a serious fluid leak |2.7.3|15
Exhaust has a major leak of exhaust gases |7.1.2|14
Front Exhaust has a major leak of exhaust gases |7.1.2|14
Nearside Seat belt anchorage prescribed area is excessively corroded |5.2.6|14
Offside Front Suspension component mounting prescribed area is excessively corroded |2.4.A.3|14
Emissions not tested |7.0|14
Offside Rear Shock absorber has a serious fluid leak |2.7.3|13
Nearside Front Suspension component mounting prescribed area is excessively corroded |2.4.A.3|13
Offside Rear position lamp|s| not working |1.1.A.3b|12
Nearside Front Shock absorber has a serious fluid leak |2.7.3|12
Offside Front Steering rack gaiter split |2.2.D.2d|12
Battery insecure |1.9.1|11
Nearside Front wheel bearing rough when rotated |2.5.A.2|11
Offside Rear Stop lamp not working |1.2.1b|11
Nearside Front Steering rack gaiter split |2.2.D.2d|10
Offside Front wheel bearing rough when rotated |2.5.A.2|10
Offside Front Body or chassis has excessive corrosion, seriously affecting its strength within 30cm of the body mountings |6.1.B.2|10
Offside Front Suspension arm rubber bush deteriorated resulting in excessive movement |2.4.G.2|10
Exhaust system not adequately supported |7.1.1|10
Rear fog lamp missing |1.3.2a|9
Rear Mechanical brake component has restricted free movement9
Nearside Rear position lamp|s| excessively deteriorated so that it is not visible from a reasonable distance |1.1.A.3d|9
Fuel hose leaking |7.2.3|9
Nearside Front Headlamp not working on dipped beam |1.7.5a|9
Mechanical brake component has restricted free movement9
Offside Rear Seat belt anchorage prescribed area is excessively corroded |5.2.6|9
Offside Obligatory mirror missing |8.1.1|9
Nearside Rear rear brake recording little or no effort |3.7.B.5a|9
Offside Front Shock absorber has negligible damping effect |2.7.5|9
rear brakes release unevenly |3.7.B.4|8
Parking brake efficiency below requirements (1.4.2 (a) (i))8
Offside Front Headlamp not working on main beam |1.7.5a|8
Nearside Rear Seat belt anchorage prescribed area is excessively corroded |5.2.6|8
Hazard warning tell tale not working correctly |1.4.B.1e|8
Offside Rear Vehicle structure has excessive corrosion, seriously affecting its strength within 30cm of the body mountings |6.1.B.2|8
Nearside Rear Direction indicator not working |1.4.A.2c|8
Rear Fuel system component leaking |7.2.3|8
Offside Rear rear brake recording little or no effort |3.7.B.5a|8
Offside Front Shock absorber has a serious fluid leak |2.7.3|8
Position lamp switch faulty |1.1.A.1|7
Nearside Rear Body or chassis has excessive corrosion, seriously affecting its strength within 30cm of the body mountings |6.1.B.2|7
Stop lamp not working |1.2.1b|7
Rear Rear fog lamp not working |1.3.2b|7
Nearside Rear Service brake excessively binding (1.2.1 (f))7
Nearside Front wheel bearing has excessive play |2.5.A.3c|7
Front brake application uneven7
Offside Rear position lamp|s| excessively deteriorated so that it is not visible from a reasonable distance |1.1.A.3d|7
Nearside Rear Position lamp not working (4.2.1 (a) (ii))7
Nearside Front Direction indicator not working |1.4.A.2c|7
Windscreen has damage7
Headlamp switch faulty |1.7.1|7
Offside Front Track rod end ball joint dust cover excessively damaged so that it no longer prevents the ingress of dirt |2.2.C.1c|7
Nearside Front Suspension arm rubber bush deteriorated resulting in excessive movement |2.4.G.2|7
Fuel tank leaking |7.2.3|7
Offside Front Seat belt anchorage prescribed area is excessively corroded |5.2.6|7
Rear Stop lamp not working |1.2.1b|7
Nearside Axle king pin has excessive play in pin and/or bush adversely affecting the steering |2.5.A.3a|7
Headlamp not working on main beam |1.7.5a|7
Exhaust emissions hydrocarbon content excessive |8.2.1.2 |b||7
Nearside Front Vehicle structure has excessive corrosion, seriously affecting its strength within 30cm of the body mountings |6.1.B.2|7
Stop lamp(s) all not working (4.3.1 (a) (iii))7
Driver`s seat insecure |6.2.A.1|6
Nearside Front Body or chassis has excessive corrosion, seriously affecting its strength within 30cm of the body mountings |6.1.B.2|6
Offside Rear Body or chassis has excessive corrosion, seriously affecting its strength within 30cm of the body mountings |6.1.B.2|6
Horn not loud enough to be heard by another road user |1.6.2b|6
Service brake efficiency below requirements (1.2.2 (a) (i))6
Offside Axle king pin has excessive play in pin and/or bush adversely affecting the steering |2.5.A.3a|6
Offside Front Headlamp not working on dipped beam |1.7.5a|6
Front Fuel hose leaking |7.2.3|6
Nearside Front Headlamp not working on main beam |1.7.5a|6
Nearside Body or chassis has excessive corrosion, seriously affecting its strength within 30cm of the body mountings |6.1.B.2|6
Fuel pipe leaking |7.2.3|6
Rear Brake hose bulging under pressure |3.6.B.3|6
Offside Rear Direction indicator not working |1.4.A.2c|6
Offside Front Direction indicator not working |1.4.A.2c|6
Nearside Front Front position lamp|s| not working |1.1.A.3b|6
Horn not working (7.7 (a) (ii))6
Nearside Track rod end ball joint dust cover excessively deteriorated so that it no longer prevents the ingress of dirt |2.2.C.1c|6
Direction indicators flashing more than 120 times a minute |1.4.A.2g|6
Brake pedal spongy |3.3.B.1b|6
Nearside Front Shock absorber has negligible damping effect |2.7.5|6
Exhaust engine idle speed too high |7.3.A.2a|5
Nearside Headlamp excessively deteriorated so that the light output is severely reduced |1.7.5a|5
Brake hose has insufficient room to move5
Offside Front wheel bearing has excessive play |2.5.A.3c|5
Offside Rear Position lamp not working (4.2.1 (a) (ii))5
Nearside Front Direction indicators not working |1.4.A.2c|5
Nearside Rear position lamp|s| not working |1.1.A.3b|5
Offside Vehicle structure has excessive corrosion, seriously affecting its strength within 30cm of the body mountings |6.1.B.2|5
Centre Exhaust system not adequately supported |7.1.1|5
Nearside Rear Anti-roll bar has excessive play in a pin/bush |2.4.G.2|5
Brake performance not tested |3.7.A.1|5
Parking brake: efficiency below requirements |3.7.C.1b|5
Nearside Front Seat belt anchorage prescribed area is excessively corroded |5.2.6|5
Nearside Rear Braking system leaking |3.6.A.1|5
Nearside Front Track rod end ball joint dust cover excessively damaged so that it no longer prevents the ingress of dirt |2.2.C.1c|5
Nearside Suspension component mounting prescribed area is excessively corroded |2.4.A.3|5
Offside Suspension component mounting prescribed area is excessively corroded |2.4.A.3|5
Offside Rear Rear fog lamp missing |1.3.2a|5
Offside Front Front position lamp|s| not working |1.1.A.3b|5
Rear Fuel hose leaking |7.2.3|5
Offside Track rod end ball joint dust cover excessively deteriorated so that it no longer prevents the ingress of dirt |2.2.C.1c|5
Service brake efficiency below requirements |1.2.2 |a| |i||5
Headlamp not working on dipped beam |1.7.5a|5
Nearside Rear Leaf spring has excessive wear in a shackle pin and/or bush |2.4.B.2|5
Nearside Rear Direction indicators 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 Rear Anti-roll bar rubber bush deteriorated resulting in excessive movement |2.4.G.2|5
Offside Headlamp not in good working order adversely affecting beam image |1.2.4a|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.

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