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MG MGB MOT Results

76.4% pass rate
from 9,650 tests in 2020
(14% better than other pre-1990 cars)
Number of tests by age
Failure rates by item

Here you can drill down into the failure rates for each item on the test. We've also compared the rates to the average results for pre-1990 cars and highlighted areas where the MG MGB is unusually good or bad.

  • 10% fail on Lamps, reflectors and electrical equipment (25% better than other pre-1990 cars)
    • 2.5% fail on Headlamp aim (28% better than other pre-1990 cars)
      • 2.4% fail on Headlamp aim (27% better than other pre-1990 cars)
      • 0.16% fail on Headlamp aim not tested
    • 2.2% fail on Stop lamp
    • 2.1% fail on Headlamps (30% better than other pre-1990 cars)
      • 2.0% fail on Headlamp (30% better than other pre-1990 cars)
      • 0.10% fail on Dipswitch
    • 2.1% fail on Electrical equipment
      • 1.7% fail on Horn
      • 0.31% fail on Battery(ies) (53% better than other pre-1990 cars)
      • 0.15% fail on Electrical wiring
      • 0.010% fail on Trailer electrical socket
    • 1.6% fail on Direction indicators (40% better than other pre-1990 cars)
      • 1.6% fail on Flashing type (40% better than other pre-1990 cars)
        • 0.92% fail on Individual direction indicators (43% better than other pre-1990 cars)
        • 0.72% fail on All direction indicators (37% worse than other pre-1990 cars)
        • 0.041% fail on Switch
    • 1.0% fail on Registration plate lamp(s) (28% better than other pre-1990 cars)
    • 0.97% fail on Position lamps (39% better than other pre-1990 cars)
      • 0.74% fail on Position lamp (49% better than other pre-1990 cars)
      • 0.20% fail on All position lamps
      • 0.052% fail on Switch
    • 0.63% fail on Front and rear fog lamps (73% better than other pre-1990 cars)
      • 0.63% fail on Rear fog lamp (73% better than other pre-1990 cars)
        • 0.61% fail on Rear fog lamp (73% better than other pre-1990 cars)
        • 0.021% fail on Switch (91% better than other pre-1990 cars)
    • 0.10% fail on Mandatory tell-tales (73% better than other pre-1990 cars)
      • 0.093% fail on Rear fog lamp tell-tale (67% better than other pre-1990 cars)
      • 0.010% fail on Main beam tell-tale
    • 0.031% fail on Hazard warning (89% better than other pre-1990 cars)
      • 0.031% fail on Switch (89% better than other pre-1990 cars)
  • 7.7% fail on Brakes (20% better than other pre-1990 cars)
    • 6.2% fail on Brake performance (14% better than other pre-1990 cars)
      • 3.4% fail on Service brake performance
        • 3.3% fail on Rbt
          • 2.5% fail on Service brake performance
          • 1.0% fail on Service brake imbalance
        • 0.052% fail on Plate brake tester
          • 0.052% fail on Service brake efficiency (Trikes, quads and pre-68 vehicles)
        • 0.041% fail on Decelerometer
          • 0.041% fail on Service brake performance
      • 2.3% fail on Service Brake Efficiency (sp) (24% better than other pre-1990 cars)
        • 2.2% fail on Rbt (sp) (22% better than other pre-1990 cars)
          • 1.9% fail on Service brake imbalance
          • 0.54% fail on Service brake performance (56% better than other pre-1990 cars)
        • 0.021% fail on Plate brake tester (sp)
          • 0.021% fail on Service brake imbalance
        • 0.010% fail on Decelerometer (sp)
      • 2.1% fail on Parking brake efficiency (sp) (27% better than other pre-1990 cars)
        • 2.1% fail on Rbt (sp) (24% better than other pre-1990 cars)
        • 0.062% fail on Decelerometer (sp) (71% better than other pre-1990 cars)
        • 0.021% fail on Plate brake tester (sp)
      • 1.4% fail on Parking brake performance
        • 1.4% fail on Rbt
          • 0.76% fail on Parking (secondary brake performance) (120% worse than other pre-1990 cars)
          • 0.68% fail on Parking brake performance
          • 0.052% fail on Parking brake efficiency (Trikes, quads and pre-68 vehicles)
        • 0.041% fail on Plate brake tester
          • 0.031% fail on Parking (secondary brake performance)
          • 0.021% fail on Parking brake performance
      • 0.23% fail on Brake performance not tested
    • 0.50% fail on Mechanical brake components (44% better than other pre-1990 cars)
      • 0.23% fail on Brake linings and pads (46% better than other pre-1990 cars)
        • 0.22% fail on Brake pads (44% better than other pre-1990 cars)
        • 0.010% fail on Brake linings
      • 0.21% fail on Brake cables, rods, levers and linkages
        • 0.10% fail on Cable
        • 0.062% fail on Lever
        • 0.021% fail on Clevis joint
        • 0.010% fail on Rod
        • 0.010% fail on Linkage
        • 0.010% fail on Pivot
      • 0.093% fail on Brake discs and drums (73% better than other pre-1990 cars)
        • 0.052% fail on Brake discs (82% better than other pre-1990 cars)
        • 0.041% fail on Brake drums
    • 0.42% fail on Brake actuators (including spring brakes or hydraulic cylinders)
      • 0.28% fail on Hydraulic brake cylinder
      • 0.15% fail on Hydraulic brake callipers
    • 0.37% fail on Flexible brake hoses
    • 0.36% fail on Service brake pedal or hand lever (36% better than other pre-1990 cars)
      • 0.20% fail on Pedal (52% better than other pre-1990 cars)
      • 0.17% fail on Hand lever
    • 0.34% fail on Parking brake control
      • 0.34% fail on Lever
    • 0.32% fail on Rigid brake pipes (74% better than other pre-1990 cars)
    • 0.17% fail on Hydraulic systems
      • 0.062% fail on Reservoirs
      • 0.052% fail on Brake fluid
      • 0.031% fail on Servos
      • 0.010% fail on Master cylinder
      • 0.010% fail on Valves
    • 0.15% fail on Other components and prescribed areas
      • 0.12% fail on Prescribed areas
        • 0.10% fail on Master cylinder/servo mounting
        • 0.010% fail on Actuating linkage mounting
        • 0.010% fail on Other braking system component
      • 0.021% fail on Other components
    • 0.062% fail on Air and vacuum systems
      • 0.031% fail on Leaks
      • 0.031% fail on Servos
  • 5.8% fail on Visibility (10.0% better than other pre-1990 cars)
    • 4.3% fail on Washers
    • 1.8% fail on Wipers (27% better than other pre-1990 cars)
    • 0.11% fail on View to rear
      • 0.11% fail on Mirrors
    • 0.052% fail on Bonnet
    • 0.031% fail on Driver's view
  • 5.1% fail on Suspension (37% better than other pre-1990 cars)
    • 1.6% fail on Component mounting prescribed areas (47% better than other pre-1990 cars)
    • 0.96% fail on Wheel bearings (37% better than other pre-1990 cars)
    • 0.84% fail on Shock absorbers
    • 0.67% fail on Springs
      • 0.30% fail on Leaf springs (84% worse than other pre-1990 cars)
        • 0.16% fail on Shackle pins and bushes (120% worse than other pre-1990 cars)
        • 0.062% fail on Leaf spring
        • 0.031% fail on Spring saddle (5 times worse than other pre-1990 cars)
        • 0.021% fail on Anchor pins and bushes
        • 0.021% fail on Fixings and fixing bolts
        • 0.021% fail on Shackle bracket
        • 0.010% fail on Anchor bracket
      • 0.29% fail on Spring mounting prescribed areas
      • 0.093% fail on Coil springs (75% better than other pre-1990 cars)
        • 0.073% fail on Coil spring (78% better than other pre-1990 cars)
        • 0.021% fail on Mounting
      • 0.010% fail on Bonded suspension units
        • 0.010% fail on Bonded suspension unit
    • 0.61% fail on Suspension arms (67% better than other pre-1990 cars)
      • 0.46% fail on Pins and bushes
      • 0.083% fail on Suspension arm
      • 0.052% fail on Attachment bracket and mounting
      • 0.052% fail on Ball joint (92% better than other pre-1990 cars)
    • 0.51% fail on Anti-roll bars
      • 0.22% fail on Pins and bushes
      • 0.11% fail on Linkage
      • 0.062% fail on Linkage pins and bushes
      • 0.041% fail on Linkage ball joints
      • 0.031% fail on Attachment bracket and mounting
      • 0.021% fail on Linkage ball joint dust cover
      • 0.010% fail on Ball joint
      • 0.010% fail on Linkage attachment bracket and mounting
    • 0.34% fail on Other suspension component
      • 0.22% fail on Pins and bushes
      • 0.073% fail on Other suspension component
      • 0.052% fail on Attachment bracket and mounting
    • 0.30% fail on Axles
      • 0.13% fail on King pins
      • 0.11% fail on Swivel pins and bushes
      • 0.031% fail on Stub axle
      • 0.021% fail on Axle
    • 0.073% fail on Suspension rods
      • 0.052% fail on Pins and bushes
      • 0.010% fail on Ball joint
      • 0.010% fail on Ball joint dust cover
    • 0.041% fail on Sub-frames (92% better than other pre-1990 cars)
      • 0.021% fail on Sub-frame mounting prescribed areas (93% better than other pre-1990 cars)
      • 0.010% fail on Attachment bracket and mounting
      • 0.010% fail on Pins and bushes
    • 0.031% fail on Air/gas/fluid suspension
      • 0.031% fail on Suspension unit
  • 4.0% fail on Noise, emissions and leaks
    • 3.6% fail on Exhaust emissions
      • 3.5% fail on Spark ignition
        • 3.3% fail on Non catalyst emissions (19% worse than other pre-1990 cars)
        • 0.22% fail on Emissions not tested
        • 0.073% fail on Catalyst emissions (73% better than other pre-1990 cars)
      • 0.031% fail on Compression ignition (90% better than other pre-1990 cars)
        • 0.021% fail on Pre 01/07/2008 Non turbo
        • 0.010% fail on On or after 01/07/2008
    • 0.52% fail on Fluid leaks
      • 0.27% fail on Engine oil leaks (45% better than other pre-1990 cars)
      • 0.15% fail on Other leaks
      • 0.073% fail on Hydraulic fluid leaks
      • 0.052% fail on Transmission oil leaks
    • 0.031% fail on Noise suppression
      • 0.031% fail on Sound deadening material
  • 3.5% fail on Body, chassis, structure (48% better than other pre-1990 cars)
    • 1.0% fail on Exhaust system (49% better than other pre-1990 cars)
    • 0.94% fail on Fuel system
      • 0.49% fail on Pipe (48% worse than other pre-1990 cars)
      • 0.17% fail on Hose
      • 0.17% fail on System
      • 0.093% fail on Fuel cap/sealing device (62% better than other pre-1990 cars)
      • 0.041% fail on Tank
    • 0.45% fail on Seats
      • 0.36% fail on Driver's seat
      • 0.12% fail on Passenger's seat (52% better than other pre-1990 cars)
    • 0.44% fail on Integral vehicle structure (56% better than other pre-1990 cars)
      • 0.42% fail on Integral vehicle structure condition (57% better than other pre-1990 cars)
      • 0.010% fail on Sub-frame
        • 0.010% fail on Strengthening plate
    • 0.41% fail on Chassis (61% better than other pre-1990 cars)
      • 0.39% fail on Chassis condition (62% better than other pre-1990 cars)
      • 0.031% fail on Strengthening plate
    • 0.24% fail on Doors (54% better than other pre-1990 cars)
      • 0.12% fail on Driver's door
        • 0.11% fail on Door condition
        • 0.010% fail on Catch
      • 0.12% fail on Front passenger's door
        • 0.11% fail on Door condition
        • 0.010% fail on Catch
    • 0.20% fail on Transmission (85% better than other pre-1990 cars)
      • 0.18% fail on Prop shafts
        • 0.10% fail on Joints
        • 0.073% fail on Prop shaft
      • 0.021% fail on Drive shafts (98% better than other pre-1990 cars)
        • 0.021% fail on Joints (98% better than other pre-1990 cars)
    • 0.11% fail on Floor
    • 0.10% fail on Body (63% better than other pre-1990 cars)
      • 0.073% fail on Panel
      • 0.031% fail on Other body component
    • 0.062% fail on Boot lid
      • 0.062% fail on Boot lid condition
    • 0.041% fail on Engine mounting
      • 0.031% fail on Engine mounting condition
      • 0.010% fail on Bracket
    • 0.010% fail on Bumpers
    • 0.010% fail on Towbar
      • 0.010% fail on Towbar condition
  • 3.4% fail on Steering
    • 2.1% fail on Steering gear (71% worse than other pre-1990 cars)
      • 2.1% fail on Steering rack (98% worse than other pre-1990 cars)
      • 0.041% fail on Operation
    • 1.1% fail on Steering linkage components (46% better than other pre-1990 cars)
      • 0.95% fail on Track rod end
      • 0.062% fail on Locking devices
      • 0.031% fail on Ball joint (89% better than other pre-1990 cars)
      • 0.010% fail on Steering arm
      • 0.010% fail on Other components
        • 0.010% fail on Steering linkage
    • 0.17% fail on Steering wheel
    • 0.073% fail on Steering column
    • 0.073% fail on Steering play (68% better than other pre-1990 cars)
      • 0.073% fail on Steering rack
    • 0.052% fail on Prescribed areas
    • 0.031% fail on Steering coupling
      • 0.031% fail on Universal joint
    • 0.021% fail on Steering shaft
    • 0.010% fail on Power steering
      • 0.010% fail on Operation
  • 0.91% fail on Seat belts and supplementary restraint systems (48% better than other pre-1990 cars)
    • 0.91% fail on Seat belts (48% better than other pre-1990 cars)
      • 0.44% fail on Prescribed areas (63% better than other pre-1990 cars)
      • 0.41% fail on Condition
      • 0.073% fail on Attachment
      • 0.010% fail on Requirements
      • 0.010% fail on Load limiters
  • 0.68% fail on Tyres (56% better than other pre-1990 cars)
    • 0.39% fail on Condition (51% better than other pre-1990 cars)
    • 0.26% fail on Tread depth (65% better than other pre-1990 cars)
    • 0.052% fail on Size/type
  • 0.57% fail on Road Wheels (130% worse than other pre-1990 cars)
    • 0.47% fail on Attachment (130% worse than other pre-1990 cars)
    • 0.073% fail on Condition
    • 0.041% fail on Hubs (3 times worse than other pre-1990 cars)
  • 0.23% fail on Identification of the vehicle (66% better than other pre-1990 cars)
    • 0.20% fail on Registration plates (69% better than other pre-1990 cars)
    • 0.041% fail on Vehicle Identification Number
  • 0.10% fail on Speedometer and speed limiter
    • 0.10% fail on Speedometer
  • 0.010% fail on Seat belt installation check
    • 0.010% fail on Anchorages
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