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MOT reliability

Porsche 928 s series 4 auto

300 vehicles · 273 completed MOT tests analysed
79%
MOT pass rate

Based on 300 Porsche 928 s series 4 auto vehicles and 273 completed MOT tests, the Porsche 928 s series 4 auto has an overall 79% pass rate, with an average recorded mileage of 111,137 miles.

300
Vehicles
273
MOT tests
2,122
Avg miles / year
1.4
Faults per test
1%
Dangerous-fault share

Porsche 928 s series 4 auto problem areas

Where faults occur most across all Porsche 928 s series 4 auto MOT tests:

  • Other91%
  • Emissions & nuisance8%
  • Tyres, wheels & suspension7%
  • Brakes6%
  • Steering5%
  • Seatbelts & equipment3%
  • Lamps & electrical3%
  • Body & structure3%

Porsche 928 s series 4 auto pass rate by age

How the Porsche 928 s series 4 auto's MOT pass rate changes as it ages (buckets with 20+ tests).

Age (years)TestsPass rate
131100%
141100%
151070%
161580%
172875%
183177%
193174%
202075%

Fuel types: Petrol (297), Other (3)

Most common Porsche 928 s series 4 auto MOT faults

These are the faults and advisories recorded most often across Porsche 928 s series 4 auto MOT tests:

  1. Nearside Rear Tyre worn close to the legal limit (4.1.E.1) (15 times)
  2. Oil leak, but not excessive (8.4.1 (a) (i)) (12 times)
  3. Offside Rear Tyre worn close to the legal limit (4.1.E.1) (7 times)
  4. Nearside Rear Outer Drive shaft joint constant velocity boot severely deteriorated (6.1.7 (g) (i)) (5 times)
  5. Tyre worn close to the legal limit (4.1.E.1) (5 times)
  6. Offside Front Tyre worn close to the legal limit (4.1.E.1) (4 times)
  7. Offside Front Tyre tread depth below requirements of 1.6mm (4.1.E.1) (4 times)
  8. Fuel Pipe/s corroded (4 times)
  9. Front Brake pad(s) wearing thin (3.5.1g) (4 times)
  10. Nearside Rear brake disc worn, pitted or scored, but not seriously weakened (3.5.1i) (4 times)
  11. Offside Rear brake disc slightly pitted (3.5.1h) (4 times)
  12. Offside Rear brake disc worn, pitted or scored, but not seriously weakened (3.5.1i) (4 times)
  13. Parking brake: efficiency below requirements (3.7.B.7) (4 times)
  14. Offside Windscreen wiper does not clear the windscreen effectively (8.2.2) (3 times)
  15. Nearside Front Tyre tread depth below requirements of 1.6mm (4.1.E.1) (3 times)

Porsche 928 s series 4 auto pass rate by registration year

YearVehiclesTestsPass rateAvg mileage
1992 1 3 100% 104,809
1991 4 19 79% 105,820
1990 9 57 74% 100,154
1989 11 95 84% 102,550
1988 12 51 76% 125,082
1987 5 20 65% 122,316

Porsche 928 s series 4 auto reliability FAQ

Across 300 Porsche 928 s series 4 auto vehicles in our MOT data, 79% pass the MOT (a 21% failure rate), with about 1.4 faults or advisories recorded per test.

The most frequently recorded Porsche 928 s series 4 auto MOT issues are: Nearside Rear Tyre worn close to the legal limit (4.1.E.1); Oil leak, but not excessive (8.4.1 (a) (i)); Offside Rear Tyre worn close to the legal limit (4.1.E.1).

The typical Porsche 928 s series 4 auto in our data has covered around 111,137 miles.

Compare the Porsche 928 s series 4 auto

See how the Porsche 928 s series 4 auto stacks up against other Porsche models on MOT reliability:

928 s series 4 auto vs 911 928 s series 4 auto vs Boxster 928 s series 4 auto vs Cayenne 928 s series 4 auto vs Macan

Check a specific Porsche 928 s series 4 auto

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