Porsche 911 MOT Results

Registered in 1999
78.4% pass rate
from 1,252 tests in 2020
(49% better than other 1999 cars)
Pass rate by mileage
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 1999 cars and highlighted areas where the Porsche 911 is unusually good or bad.

  • 8.3% fail on Lamps, reflectors and electrical equipment (44% better than other 1999 cars)
    • 2.4% fail on Headlamps (39% better than other 1999 cars)
      • 1.8% fail on Headlamp (49% better than other 1999 cars)
      • 0.48% fail on Headlamp levelling device (68% worse than other 1999 cars)
      • 0.080% fail on Dipswitch
    • 2.1% fail on Headlamp aim (41% better than other 1999 cars)
      • 1.8% fail on Headlamp aim (46% better than other 1999 cars)
      • 0.32% fail on Headlamp aim not tested (13% worse than other 1999 cars)
    • 1.8% fail on Direction indicators (25% better than other 1999 cars)
      • 1.8% fail on Flashing type (25% better than other 1999 cars)
        • 0.96% fail on Side repeaters (43% worse than other 1999 cars)
        • 0.48% fail on Individual direction indicators (70% better than other 1999 cars)
        • 0.16% fail on All direction indicators (12% better than other 1999 cars)
        • 0.16% fail on Switch (5 times worse than other 1999 cars)
    • 1.5% fail on Registration plate lamp(s) (14% better than other 1999 cars)
    • 1.3% fail on Stop lamp (70% better than other 1999 cars)
    • 1.3% fail on Electrical equipment (31% worse than other 1999 cars)
      • 1.1% fail on Horn (120% worse than other 1999 cars)
      • 0.080% fail on Electrical wiring
      • 0.080% fail on Battery(ies)
    • 0.96% fail on Front and rear fog lamps (28% better than other 1999 cars)
      • 0.96% fail on Rear fog lamp (27% better than other 1999 cars)
        • 0.96% fail on Rear fog lamp (24% better than other 1999 cars)
    • 0.080% fail on Position lamps
      • 0.080% fail on Position lamp
  • 4.9% fail on Brakes (63% better than other 1999 cars)
    • 2.7% fail on Rigid brake pipes (13% better than other 1999 cars)
    • 2.2% fail on Brake performance (72% better than other 1999 cars)
      • 1.5% fail on Parking brake efficiency (sp) (57% better than other 1999 cars)
        • 1.1% fail on Rbt (sp) (66% better than other 1999 cars)
        • 0.40% fail on Decelerometer (sp) (160% worse than other 1999 cars)
      • 0.32% fail on Service brake performance (89% better than other 1999 cars)
        • 0.32% fail on Rbt (89% better than other 1999 cars)
          • 0.32% fail on Service brake performance (86% better than other 1999 cars)
      • 0.24% fail on Service Brake Efficiency (sp) (91% better than other 1999 cars)
        • 0.24% fail on Rbt (sp) (90% better than other 1999 cars)
          • 0.24% fail on Service brake performance (79% better than other 1999 cars)
      • 0.24% fail on Parking brake performance (82% better than other 1999 cars)
        • 0.24% fail on Rbt (81% better than other 1999 cars)
          • 0.16% fail on Parking brake performance (86% better than other 1999 cars)
          • 0.080% fail on Parking (secondary brake performance)
      • 0.080% fail on Brake performance not tested
    • 0.56% fail on Mechanical brake components (77% better than other 1999 cars)
      • 0.48% fail on Brake discs and drums (44% better than other 1999 cars)
        • 0.48% fail on Brake discs (42% better than other 1999 cars)
      • 0.16% fail on Brake linings and pads (90% better than other 1999 cars)
        • 0.16% fail on Brake pads (90% better than other 1999 cars)
    • 0.32% fail on ABS / EBS / ESC (78% better than other 1999 cars)
      • 0.32% fail on Anti-lock braking system (77% better than other 1999 cars)
      • 0.080% fail on Electronic stability control
    • 0.080% fail on Air and vacuum systems
      • 0.080% fail on Servos
  • 3.8% fail on Suspension (76% better than other 1999 cars)
    • 1.9% fail on Anti-roll bars (49% better than other 1999 cars)
      • 0.56% fail on Ball joint dust cover (78% worse than other 1999 cars)
      • 0.48% fail on Linkage ball joints (55% better than other 1999 cars)
      • 0.48% fail on Linkage ball joint dust cover (28% better than other 1999 cars)
      • 0.16% fail on Anti-roll bar (110% worse than other 1999 cars)
      • 0.16% fail on Pins and bushes (61% better than other 1999 cars)
      • 0.16% fail on Linkage (63% better than other 1999 cars)
      • 0.080% fail on Ball joint
    • 0.80% fail on Suspension arms (82% better than other 1999 cars)
      • 0.40% fail on Ball joint (81% better than other 1999 cars)
      • 0.24% fail on Pins and bushes (86% better than other 1999 cars)
      • 0.24% fail on Ball joint dust cover (71% better than other 1999 cars)
    • 0.64% fail on Shock absorbers (42% better than other 1999 cars)
    • 0.24% fail on Springs (88% better than other 1999 cars)
      • 0.24% fail on Coil springs (87% better than other 1999 cars)
        • 0.24% fail on Coil spring (87% better than other 1999 cars)
    • 0.080% fail on Wheel bearings
    • 0.080% fail on Suspension rods
      • 0.080% fail on Ball joint dust cover
    • 0.080% fail on Other suspension component
      • 0.080% fail on Other suspension component
    • 0.080% fail on Component mounting prescribed areas
  • 3.6% fail on Noise, emissions and leaks (55% better than other 1999 cars)
    • 3.5% fail on Exhaust emissions (53% better than other 1999 cars)
      • 3.5% fail on Spark ignition (50% better than other 1999 cars)
        • 3.0% fail on Catalyst emissions (44% better than other 1999 cars)
        • 0.32% fail on Emissions not tested (73% better than other 1999 cars)
        • 0.16% fail on Malfunction indicator lamp (70% better than other 1999 cars)
        • 0.080% fail on Non catalyst emissions
    • 0.16% fail on Fluid leaks (72% better than other 1999 cars)
      • 0.080% fail on Engine oil leaks
      • 0.080% fail on Other leaks
  • 3.1% fail on Visibility (59% better than other 1999 cars)
    • 1.7% fail on Wipers (62% better than other 1999 cars)
    • 1.4% fail on Washers (52% better than other 1999 cars)
    • 0.080% fail on Bonnet
    • 0.080% fail on Condition of glass
      • 0.080% fail on Windscreen
  • 2.9% fail on Body, chassis, structure (72% better than other 1999 cars)
    • 1.3% fail on Transmission (58% better than other 1999 cars)
      • 1.1% fail on Drive shafts (61% better than other 1999 cars)
        • 1.1% fail on Joints (61% better than other 1999 cars)
      • 0.16% fail on Prop shafts (22% better than other 1999 cars)
        • 0.16% fail on Joints (9.0% better than other 1999 cars)
    • 1.0% fail on Exhaust system (70% better than other 1999 cars)
    • 0.40% fail on Chassis (66% better than other 1999 cars)
      • 0.40% fail on Chassis condition (66% better than other 1999 cars)
    • 0.16% fail on Fuel system (71% better than other 1999 cars)
      • 0.16% fail on Fuel cap/sealing device (30% better than other 1999 cars)
    • 0.080% fail on Integral vehicle structure
      • 0.080% fail on Integral vehicle structure condition
  • 2.9% fail on Tyres (43% better than other 1999 cars)
    • 1.8% fail on Tread depth (37% better than other 1999 cars)
    • 1.2% fail on Condition (44% better than other 1999 cars)
    • 0.16% fail on Size/type (23% better than other 1999 cars)
  • 0.96% fail on Seat belts and supplementary restraint systems (77% better than other 1999 cars)
    • 0.72% fail on SRS malfunction indicator lamp (48% better than other 1999 cars)
    • 0.24% fail on Seat belts (92% better than other 1999 cars)
      • 0.16% fail on Condition (72% better than other 1999 cars)
      • 0.080% fail on Prescribed areas
  • 0.72% fail on Identification of the vehicle (25% better than other 1999 cars)
    • 0.72% fail on Registration plates (25% better than other 1999 cars)
  • 0.64% fail on Steering (83% better than other 1999 cars)
    • 0.48% fail on Steering linkage components (79% better than other 1999 cars)
      • 0.40% fail on Track rod end (78% better than other 1999 cars)
      • 0.080% fail on Ball joint
    • 0.080% fail on Steering gear
      • 0.080% fail on Steering rack
    • 0.080% fail on Power steering
      • 0.080% fail on Other components
  • 0.32% fail on Road Wheels (0.40% better than other 1999 cars)
    • 0.24% fail on Attachment (6.6% better than other 1999 cars)
    • 0.080% fail on Condition

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