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MOT reliability

Porsche 928

1,320 vehicles · 7,990 completed MOT tests analysed
77%
MOT pass rate

Based on 1,320 Porsche 928 vehicles and 7,990 completed MOT tests, the Porsche 928 has an overall 77% pass rate, with an average recorded mileage of 111,209 miles.

1,320
Vehicles
7,990
MOT tests
1,512
Avg miles / year
1.5
Faults per test
0%
Dangerous-fault share

Porsche 928 problem areas

Where faults occur most across all Porsche 928 MOT tests:

  • Other97%
  • Brakes8%
  • Emissions & nuisance7%
  • Tyres, wheels & suspension7%
  • Lamps & electrical3%
  • Seatbelts & equipment3%
  • Steering2%
  • Body & structure1%

Porsche 928 pass rate by age

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

Age (years)TestsPass rate
1367%
2475%
51100%
6425%
7367%
8250%
9367%
101979%
118586%
1214176%
1319576%
1422280%
1527873%
1635574%
1739475%
1835776%
1934476%
2034977%

Fuel types: Petrol (1,319), Diesel (1)

Most common Porsche 928 MOT faults

These are the faults and advisories recorded most often across Porsche 928 MOT tests:

  1. Oil leak (252 times)
  2. Exhaust emissions Lambda reading after 2nd fast idle outside specified limits (7.3.D.3) (243 times)
  3. Nearside Rear Tyre worn close to the legal limit (4.1.E.1) (219 times)
  4. Offside Rear Tyre worn close to the legal limit (4.1.E.1) (210 times)
  5. Oil leak, but not excessive (8.4.1 (a) (i)) (136 times)
  6. Fuel pipe/s corroded (127 times)
  7. Windscreen washer provides insufficient washer liquid (8.2.3) (122 times)
  8. Offside Front wheel bearing has slight play (2.5.A.3c) (108 times)
  9. Nearside Front Tyre worn close to the legal limit (4.1.E.1) (104 times)
  10. Offside Front Tyre worn close to the legal limit (4.1.E.1) (104 times)
  11. Nearside Front wheel bearing has slight play (2.5.A.3c) (99 times)
  12. Exhaust Lambda reading after 2nd fast idle outside specified limits (8.2.1.2 (c)) (97 times)
  13. Parking brake: efficiency below requirements (3.7.B.7) (92 times)
  14. Nearside Headlamp aim too low (1.8) (83 times)
  15. Offside Headlamp aim too low (1.8) (77 times)

Porsche 928 pass rate by registration year

YearVehiclesTestsPass rateAvg mileage
2019 1 1 100% 129,432
2018 3 7 57% 84,655
2016 1 3 67% 119,250
2015 1 6 50% 169,026
2009 1 1 100% 85,151
2008 1 1 100% 90,604
2007 1 1 100% 100,721
2006 1 1 100% 227,944
2003 1 6 67% 49,291
2002 1 3 67% 145,209
2000 3 6 50% 71,158
1998 1 7 57% 108,693
1996 4 47 72% 135,149
1995 71 1,006 78% 82,031
1994 62 955 77% 97,353
1993 67 937 75% 99,309
1992 44 568 78% 134,807
1991 45 558 80% 137,268
1990 81 866 83% 113,394
1989 75 921 80% 123,274
1988 12 83 84% 122,541
1987 18 88 83% 87,244
1986 7 47 79% 109,605
1985 4 12 83% 113,858
1984 6 33 76% 110,386
1983 6 24 75% 89,177
1982 44 334 69% 111,762
1981 33 223 65% 139,451
1980 55 377 70% 116,100
1979 90 600 74% 107,499
1978 40 268 77% 105,936

Porsche 928 reliability FAQ

Across 1,320 Porsche 928 vehicles in our MOT data, 77% pass the MOT (a 23% failure rate), with about 1.5 faults or advisories recorded per test.

The most frequently recorded Porsche 928 MOT issues are: Oil leak; Exhaust emissions Lambda reading after 2nd fast idle outside specified limits (7.3.D.3); Nearside Rear Tyre worn close to the legal limit (4.1.E.1).

The typical Porsche 928 in our data has covered around 111,209 miles.

Compare the Porsche 928

See how the Porsche 928 stacks up against other Porsche models on MOT reliability:

928 vs 911 928 vs Boxster 928 vs Cayenne 928 vs Macan

Check a specific Porsche 928

Enter a registration to see that exact vehicle's full MOT history, advisories and recurring faults.

See all Porsche models · Learn about common MOT failures · what an MOT checks