1994 · 30 years old at test · Petrol mostly

1994 Porsche 911 MOT pass rate and common faults

509 MOT tests in 2024. 86.6% passed first time, compared with 67.5% for all cars the same age.

128Well above average
Passed first time86.6%
Failed or needed repairs13.4%
Typical mileage at test93,000

Most common reasons for failing

Share of all 509 tests where this item caused a failure.

  1. Rear fog lamp: not working1.6%
  2. Catalyst emissions: carbon monoxide content after 2nd fast idle exceeds manufacturer's specified limits1.4%
  3. Headlamp aim: too high1.0%
  4. Joints: constant velocity boot split or insecure, no longer prevents the ingress of dirt1.0%
  5. Shock absorbers: has a serious fluid leak0.8%
  6. Tread depth below requirements of 1.6mm0.8%
    12 marked dangerous
  7. Stop lamp: not working0.8%
  8. Parking brake performance: inoperative on one side0.6%
  9. Position lamp: not working0.6%
  10. Headlamp levelling device: inoperative0.6%

Problem areas

Failure items found per 100 tests, by part of the car.

  1. Lights & electrics11.6%
  2. Emissions & leaks4.1%
  3. Brakes2.8%
  4. Suspension2.4%
  5. Visibility (wipers, screen, mirrors)1.6%
  6. Body & chassis1.2%
  7. Tyres1.0%
  8. Steering0.8%

Most common advisories

Not failures yet, but things the tester warned about.

  1. Engine oil leaks: leaking excessively from engine13.8%
  2. Tread depth below requirements of 1.6mm6.5%
  3. Brake discs: in such a condition that it is seriously weakened2.9%
  4. Tyres - condition: has a tear, caused by separation or partial failure of its structure2.8%
  5. Coil spring: corroded so that its cross sectional area is reduced and seriously weakened2.6%

What this means if you are buying one

This model year does better than most cars its age, so it is a reasonable used buy on MOT record alone. Before buying, check the area that fails most: rear fog lamp: not working. Then look up the car's own MOT history on GOV.UK with its number plate, and look for repeat advisories.

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Questions

What is the MOT pass rate for a 1994 Porsche 911?

In 2024, 86.6% of 1994 Porsche 911 cars passed their MOT first time, across 509 tests. The average for all 30-year-old cars was 67.5%.

What are the most common MOT failures on a 1994 Porsche 911?

The most common failure reasons were rear fog lamp: not working; catalyst emissions: carbon monoxide content after 2nd fast idle exceeds manufacturer's specified limits; headlamp aim: too high. The biggest problem area was lights & electrics.

Is the 1994 Porsche 911 reliable at MOT time?

Its MOT Rank score is 128, which is well above average for a car of its age (100 means exactly average).