Porsche 911 MOT Results

Registered in 1991
82.6% pass rate
from 345 tests in 2020
(51% 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.

  • 8.7% fail on Lamps, reflectors and electrical equipment (46% better than other 1991 cars)
    • 3.5% fail on Headlamp aim
      • 3.5% fail on Headlamp aim
    • 2.9% fail on Front and rear fog lamps
      • 2.9% fail on Rear fog lamp
        • 2.9% fail on Rear fog lamp
        • 0.29% fail on Switch
    • 1.2% fail on Position lamps
      • 0.87% fail on Position lamp
      • 0.29% fail on Switch
    • 0.87% fail on Direction indicators
      • 0.87% fail on Flashing type
        • 0.87% fail on Individual direction indicators
    • 0.87% fail on Registration plate lamp(s)
    • 0.58% fail on Electrical equipment
      • 0.29% fail on Electrical wiring
      • 0.29% fail on Horn
    • 0.29% fail on Headlamps
      • 0.29% fail on Headlamp levelling device
    • 0.29% fail on Stop lamp
    • 0.29% fail on Mandatory tell-tales
      • 0.29% fail on Rear fog lamp tell-tale
  • 4.1% fail on Visibility
    • 3.5% fail on Washers
    • 0.29% fail on Condition of glass
      • 0.29% fail on Windscreen
    • 0.29% fail on Wipers
  • 3.2% fail on Brakes (73% better than other 1991 cars)
    • 2.3% fail on Brake performance (71% better than other 1991 cars)
      • 1.4% fail on Service brake performance
        • 1.4% fail on Rbt
          • 1.4% fail on Service brake performance
      • 0.87% fail on Parking brake efficiency (sp) (74% better than other 1991 cars)
        • 0.87% fail on Rbt (sp) (72% better than other 1991 cars)
      • 0.58% fail on Service Brake Efficiency (sp) (82% better than other 1991 cars)
        • 0.58% fail on Rbt (sp) (81% better than other 1991 cars)
          • 0.58% fail on Service brake performance
          • 0.29% fail on Service brake imbalance
    • 0.87% fail on Mechanical brake components
      • 0.58% fail on Brake discs and drums
        • 0.58% fail on Brake discs
      • 0.29% fail on Brake linings and pads
        • 0.29% fail on Brake pads
    • 0.29% fail on Flexible brake hoses
    • 0.29% fail on ABS / EBS / ESC
      • 0.29% fail on Anti-lock braking system
  • 2.6% fail on Noise, emissions and leaks
    • 1.7% fail on Exhaust emissions
      • 1.7% fail on Spark ignition
        • 1.2% fail on Non catalyst emissions
        • 0.29% fail on Catalyst emissions
        • 0.29% fail on Emissions not tested
    • 1.4% fail on Fluid leaks
      • 1.4% fail on Engine oil leaks
      • 0.29% fail on Transmission oil leaks
    • 0.29% fail on Noise suppression
      • 0.29% fail on Undertray
  • 2.3% fail on Suspension (79% better than other 1991 cars)
    • 1.7% fail on Anti-roll bars
      • 1.4% fail on Linkage ball joint dust cover (7 times worse than other 1991 cars)
      • 0.29% fail on Ball joint dust cover
    • 0.29% fail on Wheel bearings
    • 0.29% fail on Shock absorbers
  • 2.0% fail on Steering (60% better than other 1991 cars)
    • 1.4% fail on Steering gear
      • 1.4% fail on Steering rack
    • 0.58% fail on Steering linkage components
      • 0.58% fail on Track rod end
  • 1.4% fail on Tyres
    • 1.4% fail on Tread depth
    • 0.29% fail on Condition
  • 0.87% fail on Identification of the vehicle
    • 0.87% fail on Registration plates
  • 0.87% fail on Body, chassis, structure (91% better than other 1991 cars)
    • 0.87% fail on Transmission
      • 0.87% fail on Drive shafts
        • 0.87% fail on Joints

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