Porsche 911 MOT Results

Registered in 1991
78.4% pass rate
from 287 tests in 2017
(44% better than other 1991 cars)
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 1991 cars and highlighted areas where the Porsche 911 is unusually good or bad.

  • 13% fail on Lamps, Reflectors and Electrical Equipment (37% better than other 1991 cars)
    • 6.6% fail on Headlamp aim
    • 3.8% fail on Registration plate lamp
    • 2.4% fail on Stop lamp
    • 2.1% fail on Rear fog lamp
      • 2.1% fail on Fog lamp
      • 0.70% fail on Tell tale
      • 0.35% fail on Switch
    • 1.7% fail on Position lamps
      • 1.4% fail on Front lamps
      • 0.70% fail on Rear lamps
    • 1.7% fail on Direction indicators
      • 1.7% fail on Flashing type
        • 1.4% fail on Individual lamps
        • 0.35% fail on Side repeaters
    • 1.4% fail on Headlamps
      • 0.70% fail on Headlamp
      • 0.35% fail on Headlamp defects which do require an aim check on retest
        • 0.35% fail on Headlamp cleaning device
      • 0.35% fail on Switch
    • 0.70% fail on Battery
    • 0.70% fail on Horn
    • 0.35% fail on Hazard warning
      • 0.35% fail on Switch
    • 0.35% fail on Headlamp aim not tested
  • 6.6% fail on Suspension (57% better than other 1991 cars)
    • 4.2% fail on Anti-roll bars (2 times worse than other 1991 cars)
      • 3.8% fail on Linkage pins/bushes/ball joints (4 times worse than other 1991 cars)
      • 0.35% fail on Pins/bushes/ball joints
    • 2.1% fail on Drive shafts
      • 1.4% fail on Any drive shaft which is part of the suspension (10 times worse than other 1991 cars)
        • 1.4% fail on Drive shafts (11 times worse than other 1991 cars)
      • 1.0% fail on Front drive shafts
        • 1.0% fail on Constant velocity joints
    • 0.70% fail on Coil springs
      • 0.70% fail on Condition
    • 0.35% fail on Wheel bearings
      • 0.35% fail on Front
  • 5.2% fail on Driver's view of the road
    • 3.8% fail on Washers
    • 2.1% fail on Wipers
    • 0.35% fail on Mirrors
  • 4.2% fail on Brakes (71% better than other 1991 cars)
    • 1.4% fail on Hydraulic systems (73% better than other 1991 cars)
      • 1.4% fail on Components (69% better than other 1991 cars)
        • 1.4% fail on Hoses
    • 1.4% fail on ABS (4 times worse than other 1991 cars)
    • 1.4% fail on Brake performance (85% better than other 1991 cars)
      • 1.0% fail on Parking brake performance (74% better than other 1991 cars)
      • 0.70% fail on Rear wheels (82% better than other 1991 cars)
      • 0.35% fail on Front wheels
      • 0.35% fail on Service brake performance
    • 0.35% fail on Hub components
      • 0.35% fail on Brake calipers
  • 2.8% fail on Steering
    • 2.4% fail on Steering system
      • 2.1% fail on Steering rack
      • 0.35% fail on Track rod end
    • 0.35% fail on Locking devices
  • 2.8% fail on Tyres
    • 2.1% fail on Tread depth
    • 1.0% fail on Condition
  • 2.4% fail on Exhaust, Fuel and Emissions (69% better than other 1991 cars)
    • 1.7% fail on Emissions
    • 0.70% fail on Exhaust system (84% better than other 1991 cars)
  • 1.0% fail on Body, Structure and General Items (78% better than other 1991 cars)
    • 0.35% fail on Speedometer
    • 0.35% fail on Body security
    • 0.35% fail on Doors
      • 0.35% fail on Passengers front
  • 1.0% fail on Registration plates and VIN
    • 1.0% fail on Registration plate
  • 0.70% fail on Seat Belts and Supplementary Restraint Systems (83% better than other 1991 cars)
    • 0.70% fail on Seat belts (83% better than other 1991 cars)
      • 0.35% fail on Attachment
      • 0.35% fail on Prescribed areas

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