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SST 4G

1978 Triumph Stag Auto

Red Petrol 2997cc
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MOT Status

Valid
Expires8 May 2027
Tests19 (16 pass, 3 fail)
Pass rate84.2%

Mileage

20,262 mi
Last recorded20,262 miles
Recorded on9 May 2026
Typical for 1978 Triumph Stag Auto56,939 mi

Below or average mileage for this year

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

RegistrationSST 4G
MakeTriumph
ModelStag Auto
Year1978
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

16 pass 3 fail
Pass 9 May 2026 20,262 miles

Front Brakes imbalanced requirements only just met. It would appear that the braking system requires adjustment or repair. (1.2.1 (b) (i))

Nearside Rear Sub-frame pin or bush worn but not resulting in excessive movement (5.3.4 (a) (i))

Offside Rear Sub-frame pin or bush worn but not resulting in excessive movement (5.3.4 (a) (i))

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

Rear Brakes imbalanced requirements only just met. It would appear that the braking system requires adjustment or repair. (1.2.1 (b) (i))

Fail 2 May 2026 20,251 miles

Emissions unable to be completed (8.2.1.2 (d))

Front Brakes imbalanced requirements only just met. It would appear that the braking system requires adjustment or repair. (1.2.1 (b) (i))

Nearside Rear Sub-frame pin or bush worn but not resulting in excessive movement (5.3.4 (a) (i))

Offside Rear Sub-frame pin or bush worn but not resulting in excessive movement (5.3.4 (a) (i))

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

Rear Brakes imbalanced requirements only just met. It would appear that the braking system requires adjustment or repair. (1.2.1 (b) (i))

Pass 5 Apr 2025 19,950 miles

Nearside Rear Sub-frame pin or bush worn but not resulting in excessive movement (5.3.4 (a) (i))

Offside Rear Sub-frame pin or bush worn but not resulting in excessive movement (5.3.4 (a) (i))

Fail 30 Mar 2025 19,950 miles

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

Exhaust emissions hydrocarbon content excessive (8.2.1.2 (b))

Nearside Rear Sub-frame pin or bush worn but not resulting in excessive movement (5.3.4 (a) (i))

Offside Rear Sub-frame pin or bush worn but not resulting in excessive movement (5.3.4 (a) (i))

Pass 6 Sep 2023 19,155 miles
Pass 9 Sep 2022 18,561 miles
Pass 23 Aug 2021 17,882 miles
Pass 11 Sep 2020 17,326 miles
Pass 18 Sep 2019 17,094 miles
Pass 4 Sep 2018 17,748 miles
Pass 22 Aug 2017 16,017 miles
Pass 27 May 2015 15,186 miles
Pass 16 May 2014 14,332 miles

Nearside Front Shock absorber has a light misting of oil (2.7.3)

Nearside Rear Brake pipe slightly corroded (3.6.B.2c)

Nearside Rear Parking brake lever ratchet mechanism is slightly worn (3.1.5)

Pass 13 May 2013 14,273 miles

Brake pipe slightly corroded (3.6.B.2c)

Coolant leak

Nearside Rear Brake pipe slightly corroded (3.6.B.2c)

Oil leak

Steering column top bearing slightly worn (2.1.2c)

both front tyres worn on edges

both rear brake slight drag

Pass 13 Apr 2012 14,177 miles

Brake pipe slightly corroded (3.6.B.2c)

Coolant leak

Nearside Rear Brake pipe slightly corroded (3.6.B.2c)

Oil leak

Steering column top bearing slightly worn (2.1.2c)

both rear brakes slight drag

Pass 15 Apr 2011 12,130 miles
Pass 8 Apr 2010 9,132 miles
Pass 28 Mar 2009 6,866 miles
Fail 7 Mar 2009 6,858 miles

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

Exhaust emissions hydrocarbon content excessive (7.3.B.1b)

Nearside Front Suspension component mounting prescribed area is inadequately repaired (2.4.A.3)

Nearside rear parking brake recording little or no effort (3.7.B.6a)

Parking brake: efficiency below requirements (3.7.B.7)

How Reliable is the Triumph Stag Auto?

Based on 21,225 MOT tests across 2,079 vehicles.

76.9%
Pass Rate
397
Miles/Year
55
Year Lifespan
2,079
On UK Roads

Top MOT Failure Points

Windscreen washer provides insufficient washer liquid 740
Parking brake: efficiency below requirements 550
Suspension component mounting prescribed area is excessively corroded 491
brake binding 442
Exhaust emissions carbon monoxide content excessive 440
Full Triumph Stag Auto reliability report

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SST 4G is a 1978 Triumph Stag Auto in Red with a 2,997cc petrol engine. This vehicle has been through 19 MOT tests with a personal pass rate of 84.2%.

Across all 1978 Triumph Stag Auto models, the average MOT pass rate is 76.2% with a typical mileage of 56,939 miles. This particular vehicle has performed better than the average for its year.

The most common reason a Triumph Stag Auto fails its MOT is windscreen washer provides insufficient washer liquid, accounting for 740 recorded failures. If you're considering buying SST 4G, it's worth having these areas checked by a mechanic before committing.

The Triumph Stag Auto typically stays on UK roads for around 55 years. At 48 years old, this Triumph Stag Auto is approaching the upper end of the typical lifespan for this model.

Frequently Asked Questions

How do I check the history of SST 4G?

You can check the full history of SST 4G by running a full vehicle check. This shows you finance, stolen, write-off, MOT history, mileage records and more.

What year was SST 4G registered?

SST 4G is a 1978 Triumph Stag Auto, first registered on 17 March 1978.

Is SST 4G safe to buy?

The MOT history for SST 4G shows 19 tests with a 84.2% pass rate. To check for outstanding finance, stolen markers, write-off history and mileage discrepancies, run a full vehicle check.

Does SST 4G 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 SST 4G. 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.