Skip to content

MOT reliability

Triumph Stag

11,466 vehicles · 65,961 completed MOT tests analysed
78%
MOT pass rate

Based on 11,466 Triumph Stag vehicles and 65,961 completed MOT tests, the Triumph Stag has an overall 78% pass rate, with an average recorded mileage of 64,187 miles.

11,466
Vehicles
65,961
MOT tests
722
Avg miles / year
1.7
Faults per test
0%
Dangerous-fault share

Triumph Stag problem areas

Where faults occur most across all Triumph Stag MOT tests:

  • Other96%
  • Steering8%
  • Emissions & nuisance6%
  • Tyres, wheels & suspension6%
  • Brakes4%
  • Seatbelts & equipment3%
  • Lamps & electrical2%
  • Body & structure1%

Triumph Stag pass rate by age

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

Age (years)TestsPass rate
12763%
21878%
31788%
42171%
51669%
612100%
71782%
81776%
92090%
101788%
1111100%
121788%
132580%
141889%
152378%
163278%
173385%
183683%
194379%
204178%

Fuel types: Petrol (11,427), Other (27), Diesel (6), LPG (3), Gas Bi-Fuel (2), Electric (1)

Most common Triumph Stag MOT faults

These are the faults and advisories recorded most often across Triumph Stag MOT tests:

  1. Oil leak (2,723 times)
  2. Parking brake: efficiency below requirements (3.7.B.7) (1,765 times)
  3. Steering column top bearing slightly worn (2.1.2c) (1,641 times)
  4. Nearside Front wheel bearing has slight play (2.5.A.3c) (1,634 times)
  5. Offside Front wheel bearing has slight play (2.5.A.3c) (1,556 times)
  6. Windscreen washer provides insufficient washer liquid (8.2.3) (1,507 times)
  7. Oil leak, but not excessive (8.4.1 (a) (i)) (1,298 times)
  8. Nearside Rear wheel bearing has slight play (2.6.2) (1,280 times)
  9. Offside Rear wheel bearing has slight play (2.6.2) (1,131 times)
  10. Steering system has slight free play detected at steering wheel (2.2.A.1b) (1,095 times)
  11. Exhaust emissions carbon monoxide content excessive (7.3.B.1a) (915 times)
  12. Nearside Front Front wheel bearing has slight play (2.5.A.3c) (786 times)
  13. Offside Front Front wheel bearing has slight play (2.5.A.3c) (740 times)
  14. Exhaust has a minor leak of exhaust gases (7.1.2) (651 times)
  15. Play in steering rack inner joint(s) (613 times)

Triumph Stag pass rate by registration year

YearVehiclesTestsPass rateAvg mileage
2021 2 5 100% 27,949
2020 1 1 100% 54,504
2019 2 7 57% 42,490
2018 1 2 50% 27,642
2017 2 2 100% 61,610
2016 3 5 80% 81,852
2015 1 7 86% 59,041
2014 1 4 100% 45,677
2013 4 21 76% 54,880
2012 3 19 63% 69,225
2010 4 36 75% 61,968
2007 3 25 88% 61,989
2006 1 3 67% 47,669
2005 1 5 80% 86,339
2004 3 32 78% 83,515
2003 1 12 92% 95,973
2002 2 33 76% 55,370
2001 1 16 88% 15,276
2000 2 16 81% 90,006
1999 4 12 83% 62,525
1998 2 22 86% 83,048
1997 5 28 96% 235,995
1996 3 5 100% 73,812
1995 6 56 71% 55,368
1994 5 52 88% 65,243
1993 5 41 80% 121,938
1992 4 28 68% 58,010
1991 6 62 61% 46,695
1990 7 70 79% 49,032
1989 5 71 83% 50,983
1988 7 74 80% 28,250
1987 5 63 75% 78,755
1986 4 40 70% 77,018
1985 5 59 80% 41,373
1984 7 69 83% 71,334
1983 9 64 75% 58,393
1982 6 70 86% 69,317
1981 14 152 76% 68,144
1980 8 105 75% 50,711
1979 18 169 80% 42,634
1978 240 2,746 76% 70,540
1977 573 6,681 78% 65,126
1976 702 8,317 75% 65,755
1975 550 5,967 76% 63,385
1974 988 10,051 78% 65,249
1973 956 10,321 78% 63,394
1972 1,275 13,388 79% 63,369
1971 617 5,970 77% 61,988
1970 102 908 79% 58,615
1969 1 15 100% 48,937
1966 1 1 100% 84,912

Triumph Stag reliability FAQ

Across 11,466 Triumph Stag vehicles in our MOT data, 78% pass the MOT (a 22% failure rate), with about 1.7 faults or advisories recorded per test.

The most frequently recorded Triumph Stag MOT issues are: Oil leak; Parking brake: efficiency below requirements (3.7.B.7); Steering column top bearing slightly worn (2.1.2c).

The typical Triumph Stag in our data has covered around 64,187 miles.

Compare the Triumph Stag

See how the Triumph Stag stacks up against other Triumph models on MOT reliability:

Stag vs Toledo Stag vs Unknown Stag vs 2000 Stag vs 1500

Check a specific Triumph Stag

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

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