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SOK 520R

1977 Triumph Stag

Red Petrol 2997cc
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MOT Status

Valid
Expires11 Aug 2027
Tests17 (13 pass, 4 fail)
Pass rate76.5%

Mileage

29,398 mi
Last recorded29,398 miles
Recorded on12 Aug 2026
Typical for 1977 Triumph Stag60,708 mi

Below or average mileage for this year

4 checks still locked for this Triumph
Stolen
Finance
Write-off
Keepers
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Vehicle Details

RegistrationSOK 520R
MakeTriumph
ModelStag
Year1977
ColourRed
Fuel typePetrol
Engine2,997cc

All premium checks include

50+ data points
Finance Check (Experian) Insurance Write-off Salvage Auction Stolen Check Previous Owners Ex-Taxi, Police, NHS Mileage Anomaly Import / Export Scrapped Check Plate Changes

MOT History

13 pass 4 fail
Pass 12 Aug 2026 29,398 miles

Offside Front Integral body structure is corroded but structural rigidity is not significantly reduced floor to inner sill (6.1.1 (c) (i))

Offside park brake low effort

Rear Service brake fluctuating, but not excessively (1.2.1 (e))

Fail 11 Aug 2026 29,398 miles

Nearside Headlamp aim too low and too far to the right. (4.1.2 (a))

Offside Headlamp aim too high (4.1.2 (a))

Offside Headlamp insecure (4.1.1 (c))

Nearside Rear Tyre has a tear, caused by separation or partial failure of its structure (5.2.3 (d) (ii)) DANGEROUS

Offside Rear Tyre has a tear, caused by separation or partial failure of its structure (5.2.3 (d) (ii)) DANGEROUS

Offside Front Integral body structure is corroded but structural rigidity is not significantly reduced floor to inner sill (6.1.1 (c) (i))

Offside park brake low effort

Rear Service brake fluctuating, but not excessively (1.2.1 (e))

Fail 22 Apr 2026 29,343 miles

Exhaust emissions carbon monoxide content excessive (8.2.1.2 (b))

Front Windscreen washer not working (3.5 (a))

Horn not working (7.7 (a))

Nearside Front Windscreen wiper does not clear the windscreen effectively (3.4 (b) (ii))

Offside Front Windscreen wiper does not clear the windscreen effectively (3.4 (b) (ii))

Offside Inner Track rod end ball joint has excessive play Rack end (2.1.3 (b) (i))

Nearside Front Tyre has a tear, caused by separation or partial failure of its structure (5.2.3 (d) (ii)) DANGEROUS

Offside Front Tyre has a tear, caused by separation or partial failure of its structure (5.2.3 (d) (ii)) DANGEROUS

General corrosion on vehicle

Hazard lights inoperative

Nearside Front Anti-roll bar linkage pin or bush worn but not resulting in excessive movement (5.3.4 (a) (i))

Nearside Front Wheel bearing has slight play (5.1.3 (a) (i))

Nearside Rear Tyre slightly damaged/cracking or perishing (5.2.3 (d) (ii))

Nearside Rear Wheel bearing has slight play (5.1.3 (a) (i))

Offside Front Anti-roll bar linkage pin or bush worn but not resulting in excessive movement (5.3.4 (a) (i))

Offside Rear Tyre slightly damaged/cracking or perishing (5.2.3 (d) (ii))

Oil leak, but not excessive (8.4.1 (a) (i))

Oil leak, but not excessive Gearbox area (8.4.1 (a) (i))

Rear Oil leak, but not excessive Differential (8.4.1 (a) (i))

Fail 24 Jun 2025 29,320 miles

Emissions unable to be completed (8.2.1.2 (d))

Nearside Front Lower Suspension arm ball joint excessively worn (5.3.4 (a) (i))

Nearside Headlamp aim too low and too far to the right. (4.1.2 (a))

Nearside Rear Position lamp not working (4.2.1 (a) (ii))

Nearside Steering rack gaiter missing or no longer prevents the ingress of dirt (2.1.3 (g) (ii))

Offside Steering rack gaiter missing or no longer prevents the ingress of dirt (2.1.3 (g) (ii))

Offside Track rod end ball joint dust cover insecure so that it no longer prevents the ingress of dirt (2.1.3 (g) (ii))

Offside Track rod end ball joint has excessive play (2.1.3 (b) (i))

Windscreen washer provides insufficient washer liquid (3.5 (a))

Nearside Front Anti-roll bar pin or bush worn but not resulting in excessive movement (5.3.4 (a) (i))

Nearside Front floor slightly corroded

Offside Front Anti-roll bar pin or bush worn but not resulting in excessive movement (5.3.4 (a) (i))

Offside Rear parking brake low effort

Pass 24 Apr 2018 26,605 miles

Offside Front Track rod end ball joint has slight play (2.2.B.1f)

Pass 12 Apr 2017 26,067 miles
Pass 20 Apr 2016 25,761 miles
Pass 3 Jun 2015 24,114 miles

Offside Power steering component(s) has slight seepage from a component (2.3.3b)

Play in steering rack inner joint(s)

offside parking brake low effort

Pass 15 May 2014 22,882 miles

Nearside Front Track rod end ball joint has slight play (2.2.B.1f)

Offside Front Suspension arm ball joint dust cover deteriorated, but preventing the ingress of dirt (2.4.G.2)

Offside Front Track rod end ball joint has slight play (2.2.B.1f)

Oil leak

Pass 2 May 2013 21,846 miles

Offside Front Suspension arm ball joint dust cover deteriorated, but preventing the ingress of dirt (2.4.G.2)

Offside Rear Shock absorber has a light misting of oil (2.7.3)

Offside Track rod end ball joint has slight play (2.2.B.1f)

Pass 30 Mar 2012 21,576 miles

Nearside Front Suspension arm rubber bush deteriorated but not resulting in excessive movement (2.4.G.2)

Offside Front Suspension arm ball joint dust cover deteriorated, but preventing the ingress of dirt (2.4.G.2)

Offside Rear Shock absorber has a light misting of oil (2.7.3)

Offside Track rod end ball joint has slight play (2.2.B.1f)

wiper blades deteriorated

Pass 14 Apr 2011 21,363 miles

Offside Rear Shock absorber has a light misting of oil (2.7.3)

Steering system has slight free play detected at steering wheel (2.2.A.1b)

Fail 28 Mar 2011 21,345 miles

Direction indicators flashing less than 60 times a minute (1.4.A.2g)

Exhaust emissions carbon monoxide content excessive (7.3.B.1a)

Hazard warning lamps not flashing in phase, with ignition off (1.4.B.1f)

Hazard warning lamps not flashing in phase, with ignition on (1.4.B.1f)

Horn not working (1.6.2a)

Offside Headlamp aim too low (1.8)

Offside Rear Direction indicator not working (1.4.A.2c)

Offside Rear Shock absorber has a light misting of oil (2.7.3)

Steering system has slight free play detected at steering wheel (2.2.A.1b)

Pass 24 Mar 2010 20,438 miles

Nearside Front Suspension component mounting prescribed area is corroded but not considered excessive (2.4.A.3)

Nearside Rear wheel bearing has slight play (2.6.2)

Offside Front Suspension component mounting prescribed area is corroded but not considered excessive (2.4.A.3)

slight play in o/s steering rack

Pass 8 Jul 2008 20,425 miles
Pass 29 Jun 2007 20,408 miles
Pass 4 Jul 2006 20,265 miles

How Reliable is the Triumph Stag?

Based on 64,590 MOT tests across 6,070 vehicles.

77.5%
Pass Rate
417
Miles/Year
56
Year Lifespan
6,070
On UK Roads

Top MOT Failure Points

Windscreen washer provides insufficient washer liquid 2,039
Parking brake: efficiency below requirements 1,744
Suspension component mounting prescribed area is excessively corroded 1,507
Stop lamp not working 1,283
brake binding 1,269
Full Triumph Stag reliability report

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SOK 520R is a 1977 Triumph Stag in Red with a 2,997cc petrol engine. This vehicle has been through 17 MOT tests with a personal pass rate of 76.5%.

Across all 1977 Triumph Stag models, the average MOT pass rate is 77.7% with a typical mileage of 60,708 miles. This particular vehicle has a lower pass rate than the average for its year, which may indicate maintenance issues worth investigating.

The most common reason a Triumph Stag fails its MOT is windscreen washer provides insufficient washer liquid, accounting for 2,039 recorded failures. If you're considering buying SOK 520R, it's worth having these areas checked by a mechanic before committing.

The Triumph Stag typically stays on UK roads for around 56 years. At 49 years old, this Triumph Stag is approaching the upper end of the typical lifespan for this model.

Frequently Asked Questions

How do I check the history of SOK 520R?

You can check the full history of SOK 520R by running a full vehicle check. This shows you finance, stolen, write-off, MOT history, mileage records and more.

What year was SOK 520R registered?

SOK 520R is a 1977 Triumph Stag, first registered on 31 December 1977.

Is SOK 520R safe to buy?

The MOT history for SOK 520R shows 17 tests with a 76.5% pass rate. To check for outstanding finance, stolen markers, write-off history and mileage discrepancies, run a full vehicle check.

Does SOK 520R have outstanding finance?

Finance checks require a premium vehicle report. This checks against all major UK finance providers to see if there is any outstanding finance on SOK 520R. If you buy a car with outstanding finance, the finance company can repossess it.

No warranty or guarantee of accuracy is provided for any free data on this page. The data guarantee applies only to information obtained through the purchase of a full check.