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Porsche 928 MOT Results

71.5% pass rate
from 731 tests in 2017
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 Porsche 928 is unusually good or bad.

  • 18% fail on Lamps, Reflectors and Electrical Equipment
    • 7.0% fail on Headlamp aim (60% worse than other pre-1990 cars)
    • 5.6% fail on Rear fog lamp (150% worse than other pre-1990 cars)
      • 5.6% fail on Fog lamp (180% worse than other pre-1990 cars)
      • 1.5% fail on Tell tale (2 times worse than other pre-1990 cars)
      • 0.14% fail on Switch
    • 3.7% fail on Position lamps
      • 2.5% fail on Rear lamps
      • 1.6% fail on Front lamps
    • 3.3% fail on Headlamps
      • 3.0% fail on Headlamp
      • 0.27% fail on Headlamp defects which don't require an aim check on retest
        • 0.27% fail on Main beam 'tell-tale'
        • 0.14% fail on Headlamp cleaning device
      • 0.14% fail on Headlamp defects which do require an aim check on retest
        • 0.14% fail on Headlamp cleaning device
    • 2.9% fail on Registration plate lamp
    • 2.2% fail on Stop lamp
    • 1.9% fail on Horn
    • 1.6% fail on Direction indicators (52% better than other pre-1990 cars)
      • 1.6% fail on Flashing type (52% better than other pre-1990 cars)
        • 0.68% fail on Individual lamps
        • 0.68% fail on Side repeaters
        • 0.14% fail on All direction indicators
        • 0.14% fail on Tell tales
    • 0.27% fail on Electrical wiring
    • 0.27% fail on Headlamp aim not tested
    • 0.14% fail on Hazard warning
      • 0.14% fail on Switch
  • 10.0% fail on Driver's view of the road (41% worse than other pre-1990 cars)
    • 7.9% fail on Washers (68% worse than other pre-1990 cars)
    • 2.9% fail on Wipers
    • 0.27% fail on Mirrors
    • 0.14% fail on Bonnet
    • 0.14% fail on Windscreen
  • 7.1% fail on Brakes (39% better than other pre-1990 cars)
    • 4.8% fail on Brake performance (43% better than other pre-1990 cars)
      • 2.6% fail on Rear wheels
      • 1.9% fail on Parking brake performance
      • 1.2% fail on Service brake performance
      • 0.96% fail on Front wheels (75% better than other pre-1990 cars)
      • 0.41% fail on Brake performance not tested
      • 0.27% fail on Brake imbalance
      • 0.14% fail on Brake operation
    • 2.3% fail on Hydraulic systems
      • 2.1% fail on Components
        • 1.8% fail on Hoses
        • 0.41% fail on Pipes
      • 0.14% fail on Brake fluid warning lamp
      • 0.14% fail on Leaks
    • 0.82% fail on Hub components
      • 0.27% fail on Brake pads
      • 0.27% fail on Brake discs
      • 0.14% fail on Brake back plates
      • 0.14% fail on Brake calipers
    • 0.68% fail on Parking brake
      • 0.68% fail on Condition
    • 0.68% fail on ABS (5 times worse than other pre-1990 cars)
    • 0.27% fail on Restricted movement
    • 0.14% fail on Air and vacuum systems
      • 0.14% fail on Components
        • 0.14% fail on Hoses
  • 6.2% fail on Suspension (37% better than other pre-1990 cars)
    • 2.1% fail on Drive shafts (100% worse than other pre-1990 cars)
      • 1.9% fail on Any drive shaft which is part of the suspension (16 times worse than other pre-1990 cars)
        • 1.9% fail on Drive shafts (24 times worse than other pre-1990 cars)
      • 0.14% fail on Front drive shafts
        • 0.14% fail on Constant velocity joints
    • 0.96% fail on Front suspension joints
    • 0.96% fail on Prescribed areas (76% better than other pre-1990 cars)
      • 0.82% fail on Component mounting (70% better than other pre-1990 cars)
      • 0.14% fail on Subframe mounting
    • 0.82% fail on Coil springs
      • 0.55% fail on Condition
      • 0.27% fail on Location
    • 0.68% fail on Wheel bearings
      • 0.68% fail on Front
    • 0.55% fail on Suspension arms
      • 0.41% fail on Pins/bushes/ball joints
      • 0.14% fail on Attachment
    • 0.27% fail on Anti-roll bars
      • 0.14% fail on Condition
      • 0.14% fail on Linkage condition
    • 0.14% fail on Tie bars/rods
      • 0.14% fail on Pins/bushes/ball joints
    • 0.14% fail on Front suspension retaining and locking devices
    • 0.14% fail on Shock absorbers
      • 0.14% fail on Condition
  • 4.8% fail on Exhaust, Fuel and Emissions
    • 2.7% fail on Emissions
    • 1.8% fail on Fuel system
      • 0.55% fail on Pipe
      • 0.55% fail on Cap
      • 0.27% fail on Tank
      • 0.27% fail on System
      • 0.14% fail on Hose
    • 0.68% fail on Exhaust system (71% better than other pre-1990 cars)
    • 0.41% fail on Emissions not tested
  • 4.2% fail on Tyres (91% worse than other pre-1990 cars)
    • 2.6% fail on Condition (110% worse than other pre-1990 cars)
    • 1.5% fail on Tread depth
    • 0.14% fail on Valve stem
  • 4.1% fail on Steering
    • 3.6% fail on Steering system
      • 1.8% fail on Steering rack
      • 1.1% fail on Track rod end
      • 0.41% fail on Steering arm
      • 0.27% fail on Free play
        • 0.27% fail on Steering rack
      • 0.27% fail on Ball joint
      • 0.14% fail on Other components
        • 0.14% fail on Steering pivot point
    • 0.41% fail on Power steering
      • 0.27% fail on Other components
      • 0.14% fail on Pump
    • 0.14% fail on Steering operation
  • 1.9% fail on Body, Structure and General Items
    • 0.82% fail on Seats
      • 0.55% fail on Drivers
      • 0.41% fail on Passengers
    • 0.41% fail on Speedometer
    • 0.27% fail on Vehicle structure
      • 0.27% fail on Chassis
    • 0.27% fail on Doors
      • 0.14% fail on Drivers
      • 0.14% fail on Passengers other
    • 0.14% fail on Body condition
  • 1.6% fail on Seat Belts and Supplementary Restraint Systems
    • 1.6% fail on Seat belts
      • 1.1% fail on Condition (160% worse than other pre-1990 cars)
      • 0.55% fail on Prescribed areas
      • 0.14% fail on Attachment
  • 0.82% fail on Registration plates and VIN
    • 0.82% fail on Registration plate
  • 0.27% fail on Road Wheels
    • 0.27% fail on Attachment