2015 · 9 years old at test · Petrol mostly

2015 Porsche 911 MOT pass rate and common faults

1,715 MOT tests in 2024. 94.4% passed first time, compared with 73.5% for all cars the same age.

129Well above average
Passed first time94.4%
Failed or needed repairs5.6%
Typical mileage at test31,000

Most common reasons for failing

Share of all 1,715 tests where this item caused a failure.

  1. Tyres - condition: has a cut in excess of the requirements deep enough to reach the ply or cords0.7%
  2. Tyres - condition: has ply or cords exposed0.6%
    23 marked dangerous
  3. Tread depth below requirements of 1.6mm0.5%
    22 marked dangerous
  4. Catalyst emissions: Lambda reading after 2nd fast idle outside specified limits0.3%
  5. Registration plates: does not conform to the specified requirements0.3%
  6. Linkage ball joint dust cover: ball joint dust cover no longer prevents the ingress of dirt0.3%
  7. Washers: provides insufficient washer liquid0.2%
  8. Washers: not working0.2%
  9. Joints: constant velocity boot split or insecure, no longer prevents the ingress of dirt0.2%
  10. Headlamp aim: too high0.2%

Problem areas

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

  1. Tyres2.1%
  2. Lights & electrics1.3%
  3. Emissions & leaks0.8%
  4. Visibility (wipers, screen, mirrors)0.8%
  5. Suspension0.6%
  6. Number plates & VIN0.4%
  7. Body & chassis0.3%
  8. Brakes0.3%

Most common advisories

Not failures yet, but things the tester warned about.

  1. Tread depth below requirements of 1.6mm7.1%
  2. Tyres - condition: has a tear, caused by separation or partial failure of its structure3.6%
  3. Non-component advisories: Nail in tyre1.7%
  4. Brake pads: less than 1.5 mm thick1.3%
  5. Brake discs: in such a condition that it is seriously weakened1.2%

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: tyres - condition: has a cut in excess of the requirements deep enough to reach the ply or cords. 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 2015 Porsche 911?

In 2024, 94.4% of 2015 Porsche 911 cars passed their MOT first time, across 1,715 tests. The average for all 9-year-old cars was 73.5%.

What are the most common MOT failures on a 2015 Porsche 911?

The most common failure reasons were tyres - condition: has a cut in excess of the requirements deep enough to reach the ply or cords; tyres - condition: has ply or cords exposed; tread depth below requirements of 1.6mm. The biggest problem area was tyres.

Is the 2015 Porsche 911 reliable at MOT time?

Its MOT Rank score is 129, which is well above average for a car of its age (100 means exactly average).