CarVerify

Free Car Check

GSD 805S

1978 Triumph Stag Auto

Green Petrol 2997cc
Search another vehicle

MOT Status

Valid
Expires9 Mar 2027
Tests4 (3 pass, 1 fail)
Pass rate75%

Mileage

2,914 mi
Last recorded2,914 miles
Recorded on10 Mar 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
Keepers
Unlock full report — £4.99
Instant £30k guarantee
or single check £9.99

Not all car check providers offer a guarantee. Don't risk buying from services that can't back their data. CarVerify reports include a £30,000 finance data guarantee.

Vehicle Details

RegistrationGSD 805S
MakeTriumph
ModelStag Auto
Year1978
ColourGreen
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

3 pass 1 fail
Pass 10 Mar 2026 2,914 miles
Fail 10 Mar 2026 2,914 miles

Windscreen washer jets misaligned and not providing sufficient fluid to the windscreen (3.5 (a))

Pass 14 Jun 2024 65,048 miles
Pass 30 Oct 2015 63,487 miles

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

Don't risk it. Know before you buy.

Not all vehicle check providers are the same. Some don't offer a data guarantee, which means if their information is wrong, you're on your own. Every CarVerify report is backed by a £30,000 finance data guarantee.

£30k guarantee Instant results Cancel anytime

GSD 805S is a 1978 Triumph Stag Auto in Green with a 2,997cc petrol engine. This vehicle has been through 4 MOT tests with a personal pass rate of 75%.

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 a lower pass rate than the average for its year, which may indicate maintenance issues worth investigating.

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 GSD 805S, 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 GSD 805S?

You can check the full history of GSD 805S by running a full vehicle check. This shows you finance, stolen, write-off, MOT history, mileage records and more.

What year was GSD 805S registered?

GSD 805S is a 1978 Triumph Stag Auto, first registered on 27 April 1978.

Is GSD 805S safe to buy?

The MOT history for GSD 805S shows 4 tests with a 75% pass rate. To check for outstanding finance, stolen markers, write-off history and mileage discrepancies, run a full vehicle check.

Does GSD 805S 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 GSD 805S. 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.