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Porsche 928 MOT Results

74.9% pass rate
from 762 tests in 2020
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.

  • 16% fail on Lamps, reflectors and electrical equipment
    • 5.5% fail on Front and rear fog lamps (130% worse than other pre-1990 cars)
      • 5.5% fail on Rear fog lamp (130% worse than other pre-1990 cars)
        • 5.2% fail on Rear fog lamp (130% worse than other pre-1990 cars)
        • 0.39% fail on Switch
    • 5.2% fail on Headlamp aim
      • 5.0% fail on Headlamp aim
      • 0.26% fail on Headlamp aim not tested
    • 2.9% fail on Headlamps
      • 2.5% fail on Headlamp
      • 0.39% fail on Headlamp levelling device (7 times worse than other pre-1990 cars)
    • 2.2% fail on Stop lamp
    • 2.1% fail on Position lamps
      • 2.1% fail on Position lamp
    • 1.6% fail on Direction indicators
      • 1.6% fail on Flashing type
        • 0.66% fail on Individual direction indicators
        • 0.52% fail on Side repeaters
        • 0.39% fail on All direction indicators
    • 1.6% fail on Registration plate lamp(s)
    • 1.2% fail on Electrical equipment
      • 1.0% fail on Horn
      • 0.13% fail on Electrical wiring
    • 0.66% fail on Mandatory tell-tales
      • 0.52% fail on Rear fog lamp tell-tale
      • 0.13% fail on Main beam tell-tale
    • 0.13% fail on Hazard warning
      • 0.13% fail on Switch
  • 6.7% fail on Brakes (30% better than other pre-1990 cars)
    • 4.2% fail on Brake performance (42% better than other pre-1990 cars)
      • 2.2% fail on Service brake performance
        • 2.2% fail on Rbt
          • 2.1% fail on Service brake performance
          • 0.13% fail on Service brake imbalance
      • 1.3% fail on Service Brake Efficiency (sp) (56% better than other pre-1990 cars)
        • 1.3% fail on Rbt (sp) (54% better than other pre-1990 cars)
          • 0.92% fail on Service brake performance
          • 0.39% fail on Service brake imbalance (81% better than other pre-1990 cars)
      • 1.3% fail on Parking brake efficiency (sp) (56% better than other pre-1990 cars)
        • 1.0% fail on Rbt (sp) (61% better than other pre-1990 cars)
        • 0.26% fail on Decelerometer (sp)
      • 0.66% fail on Parking brake performance
        • 0.66% fail on Rbt
          • 0.52% fail on Parking brake performance
          • 0.13% fail on Parking (secondary brake performance)
      • 0.26% fail on Brake performance not tested
    • 1.8% fail on ABS / EBS / ESC (12 times worse than other pre-1990 cars)
      • 1.7% fail on Anti-lock braking system (11 times worse than other pre-1990 cars)
      • 0.13% fail on Electronic stability control
    • 0.52% fail on Mechanical brake components
      • 0.26% fail on Brake linings and pads
        • 0.26% fail on Brake pads
      • 0.13% fail on Brake discs and drums
        • 0.13% fail on Brake discs
      • 0.13% fail on Brake cables, rods, levers and linkages
        • 0.13% fail on Cable
    • 0.39% fail on Parking brake control
      • 0.39% fail on Lever
    • 0.26% fail on Rigid brake pipes (78% better than other pre-1990 cars)
    • 0.13% fail on Service brake pedal or hand lever
      • 0.13% fail on Pedal
    • 0.13% fail on Flexible brake hoses
    • 0.13% fail on Brake actuators (including spring brakes or hydraulic cylinders)
      • 0.13% fail on Hydraulic brake callipers
  • 6.4% fail on Visibility
    • 5.0% fail on Washers
    • 2.2% fail on Wipers
    • 0.13% fail on Driver's view
    • 0.13% fail on Bonnet
    • 0.13% fail on View to rear
      • 0.13% fail on Mirrors
  • 5.2% fail on Body, chassis, structure
    • 3.0% fail on Transmission (120% worse than other pre-1990 cars)
      • 2.9% fail on Drive shafts (170% worse than other pre-1990 cars)
        • 2.9% fail on Joints (180% worse than other pre-1990 cars)
      • 0.26% fail on Prop shafts
        • 0.26% fail on Joints
    • 0.52% fail on Integral vehicle structure
      • 0.52% fail on Integral vehicle structure condition
    • 0.52% fail on Exhaust system (74% better than other pre-1990 cars)
    • 0.52% fail on Doors
      • 0.52% fail on Front passenger's door
        • 0.52% fail on Door condition
    • 0.39% fail on Fuel system
      • 0.13% fail on Pipe
      • 0.13% fail on Fuel cap/sealing device
      • 0.13% fail on System
    • 0.26% fail on Seats
      • 0.13% fail on Driver's seat
      • 0.13% fail on Passenger's seat
    • 0.13% fail on Chassis
      • 0.13% fail on Chassis condition
    • 0.13% fail on Boot lid
      • 0.13% fail on Boot lid condition
  • 4.2% fail on Suspension (49% better than other pre-1990 cars)
    • 1.4% fail on Suspension arms
      • 0.66% fail on Pins and bushes
      • 0.52% fail on Ball joint dust cover
      • 0.26% fail on Ball joint
    • 0.79% fail on Wheel bearings
    • 0.79% fail on Component mounting prescribed areas (74% better than other pre-1990 cars)
    • 0.66% fail on Shock absorbers
    • 0.39% fail on Springs
      • 0.39% fail on Coil springs
        • 0.39% fail on Coil spring
    • 0.26% fail on Anti-roll bars
      • 0.26% fail on Attachment bracket and mounting
    • 0.13% fail on Sub-frames
      • 0.13% fail on Sub-frame
    • 0.13% fail on Other suspension component
      • 0.13% fail on Ball joint
  • 3.7% fail on Steering
    • 1.4% fail on Steering gear
      • 1.4% fail on Steering rack
    • 1.4% fail on Steering linkage components
      • 1.2% fail on Track rod end
      • 0.13% fail on Ball joint
      • 0.13% fail on Other components
        • 0.13% fail on Steering linkage
      • 0.13% fail on Locking devices
    • 0.79% fail on Power steering
      • 0.39% fail on Pipes and hoses (3 times worse than other pre-1990 cars)
      • 0.26% fail on Other components
      • 0.13% fail on Operation
    • 0.13% fail on Steering wheel
  • 3.1% fail on Noise, emissions and leaks
    • 2.8% fail on Exhaust emissions
      • 2.8% fail on Spark ignition
        • 1.7% fail on Non catalyst emissions
        • 0.52% fail on Catalyst emissions
        • 0.52% fail on Emissions not tested
      • 0.13% fail on Compression ignition
        • 0.13% fail on Pre 01/07/2008 Non turbo
    • 0.39% fail on Fluid leaks
      • 0.26% fail on Engine oil leaks
      • 0.13% fail on Hydraulic fluid leaks
  • 1.4% fail on Tyres
    • 0.79% fail on Condition
    • 0.79% fail on Tread depth
  • 0.79% fail on Identification of the vehicle
    • 0.79% fail on Registration plates
  • 0.79% fail on Seat belts and supplementary restraint systems
    • 0.79% fail on Seat belts
      • 0.39% fail on Prescribed areas
      • 0.39% fail on Condition
  • 0.52% fail on Road Wheels
    • 0.52% fail on Attachment
  • 0.26% fail on Speedometer and speed limiter
    • 0.26% fail on Speedometer