CarVerify

Free Car Check

DEC 740S

1977 Triumph Stag

Red Petrol 2997cc
Search another vehicle

MOT Status

Expired
Expires10 Mar 2026
Tests25 (18 pass, 7 fail)
Pass rate72%

Mileage

89,465 mi
Last recorded89,465 miles
Recorded on11 Mar 2025
Typical for 1977 Triumph Stag60,708 mi

Significantly above average — investigate

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

RegistrationDEC 740S
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

18 pass 7 fail
Pass 11 Mar 2025 89,465 miles
Fail 28 Feb 2025 89,465 miles

Front Brakes imbalanced across an axle (1.2.1 (b) (i))

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

Offside Rear Coil spring fractured or broken (5.3.1 (b) (i))

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

Offside Stop lamp(s) not working (4.3.1 (a) (ii))

Parking brake lever has excessive movement indicating incorrect adjustment (1.1.6 (c))

Windscreen washer not working (3.5 (a))

Coolant leak At top hose. ()

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

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

Pass 31 Oct 2022 86,842 miles

Front Exhaust has a minor leak of exhaust gases (6.1.2 (a))

Fail 31 Oct 2022 86,842 miles

Horn not working (7.7 (a))

Windscreen washer not working (3.5 (a))

Front Exhaust has a minor leak of exhaust gases (6.1.2 (a))

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

Pass 29 Jul 2021 84,222 miles
Fail 28 Jul 2021 84,219 miles

Offside Rear Direction indicator not working (4.4.1 (a) (ii))

Front Steering rack gaiter damaged or deteriorated, but preventing the ingress of dirt (2.1.3 (g) (i))

Pass 17 Dec 2020 83,803 miles
Fail 17 Dec 2020 83,803 miles

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

Pass 6 Nov 2019 83,413 miles
Fail 6 Nov 2019 83,413 miles

Horn not working (7.7 (a) (ii))

Pass 29 Oct 2018 83,105 miles
Pass 23 Nov 2017 82,617 miles
Pass 2 Nov 2016 81,805 miles
Pass 14 Oct 2015 80,085 miles
Pass 9 Oct 2014 78,572 miles

Rear rear brake fluctuating, but not excessively (3.7.B.3)

Pass 16 Oct 2013 76,800 miles
Pass 2 Oct 2012 75,329 miles

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

Fail 27 Sep 2012 75,317 miles

Nearside Headlamp aim too low (1.8)

Nearside Rear Coil spring mounting loose (2.4.C.3a)

Offside Headlamp aim too low (1.8)

Offside Rear Coil spring mounting loose (2.4.C.3a)

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

Pass 21 Jul 2011 73,464 miles
Pass 26 Apr 2010 73,436 miles
Pass 9 May 2009 73,346 miles

Centre Exhaust has a minor leak of exhaust gases (7.1.2)

Fail 8 May 2009 73,346 miles

Front Windscreen washer provides insufficient washer liquid (8.2.3)

Offside Rear Rear position lamp(s) adversely affected by the operation of another lamp (1.1.A.3f)

Offside Rear Stop lamp not working (1.2.1b)

Rear Exhaust system not adequately supported (7.1.1)

Centre Exhaust has a minor leak of exhaust gases (7.1.2)

Pass 21 Apr 2008 73,192 miles
Pass 13 Apr 2007 71,901 miles
Pass 10 Apr 2006 71,258 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

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

DEC 740S is a 1977 Triumph Stag in Red with a 2,997cc petrol engine. This vehicle has been through 25 MOT tests with a personal pass rate of 72%.

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 DEC 740S, 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 DEC 740S?

You can check the full history of DEC 740S by running a full vehicle check. This shows you finance, stolen, write-off, MOT history, mileage records and more.

What year was DEC 740S registered?

DEC 740S is a 1977 Triumph Stag, first registered on 22 December 1977.

Is DEC 740S safe to buy?

The MOT history for DEC 740S shows 25 tests with a 72% pass rate. To check for outstanding finance, stolen markers, write-off history and mileage discrepancies, run a full vehicle check.

Does DEC 740S 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 DEC 740S. 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.