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DET 666L

1973 Triumph Stag

Green Petrol 2997cc
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MOT Status

Valid
Expires28 Apr 2027
Tests27 (20 pass, 7 fail)
Pass rate74.1%

Mileage

34,392 mi
Last recorded34,392 miles
Recorded on29 Apr 2026
Typical for 1973 Triumph Stag53,671 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

RegistrationDET 666L
MakeTriumph
ModelStag
Year1973
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

20 pass 7 fail
Pass 29 Apr 2026 34,392 miles
Pass 4 Nov 2024 32,073 miles
Pass 15 Sep 2023 30,566 miles
Pass 26 Aug 2022 30,536 miles
Pass 25 Aug 2021 30,362 miles
Pass 22 Sep 2020 30,070 miles
Pass 19 Aug 2019 28,951 miles
Pass 24 Aug 2018 28,906 miles
Pass 6 Sep 2017 28,733 miles
Pass 5 Aug 2016 28,517 miles
Pass 22 Jun 2015 28,206 miles

Nearside Front Seat belt anchorage prescribed area is corroded but not considered excessive (5.2.6)

Nearside Rear Rear wheel bearing has slight play (2.6.2)

Oil leak

Fail 18 Jun 2015 28,206 miles

Nearside Windscreen wiper not operating automatically when switched on (8.2.1b)

Offside Windscreen wiper not operating automatically when switched on (8.2.1b)

Nearside Front Seat belt anchorage prescribed area is corroded but not considered excessive (5.2.6)

Nearside Rear Rear wheel bearing has slight play (2.6.2)

Oil leak

Pass 15 Jul 2014 28,136 miles
Pass 7 Jun 2013 28,070 miles
Fail 7 Jun 2013 28,070 miles

Battery insecure (1.9.1)

Pass 15 Jun 2012 28,000 miles

Play in steering rack inner joint(s)

n/s/r and o/s/r inner sills poor repair

Oil leak

Fail 15 Jun 2012 28,000 miles

Rear Stop lamp not working (1.2.1b)

Play in steering rack inner joint(s)

n/s/r and o/s/r inner sills poor repair

Oil leak

Pass 27 Apr 2011 27,855 miles

Nearside Front Vehicle structure has slight corrosion (6.1.B.2)

Nearside Front Vehicle structure has slight corrosion (6.1.B.2)

Nearside Rear Service brake: service brake efficiency only just met. It would appear that the braking system requires adjustment or repair. (3.7.B.7)

n/s/ and o/s/ rear inner sill repairs inadequate

Pass 6 May 2010 27,793 miles

centre exhaust strap missing

Fail 29 Apr 2010 27,793 miles

Nearside rear brake binding (3.7.B.1)

Offside Steering rack gaiter split (2.2.D.2d)

Power steering pipe(s) or hose(s) leaking (2.3.3b)

Rear Exhaust system not adequately supported (7.1.1)

centre exhaust strap missing

Pass 29 Apr 2009 27,726 miles

Steering column top bearing slightly worn (2.1.2c)

all rear brake hose ferrules slightly corroded

nearside front sill corroded and holed

steering rack mountings slightly deteriorated but not allowing excessive movement

Fail 29 Apr 2009 27,726 miles

Front registration plate character(s) likely to be misread (6.3.4b)

rear brake binding (3.7.B.1)

Steering column top bearing slightly worn (2.1.2c)

all rear brake hose ferrules slightly corroded

nearside front sill corroded and holed

steering rack mountings slightly deteriorated but not allowing excessive movement

Pass 29 May 2008 27,686 miles

Brake hydraulic reservoir fluid close to minimum level (3.6.G.1b)

nearside front inner wing showing signs of corrosion

offside rear brake binding slightly

slight movement in steering rack mountings

Fail 28 May 2008 27,686 miles

Power steering pipe(s) or hose(s) leaking (2.3.3b)

Brake hydraulic reservoir fluid close to minimum level (3.6.G.1b)

nearside front inner wing showing signs of corrosion

offside rear brake binding slightly

slight movement in steering rack mountings

Pass 31 May 2007 27,558 miles
Fail 29 May 2007 27,557 miles

Nearside Front Suspension component mounting prescribed area is excessively corroded (2.4.A.3)

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

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

rear brake application uneven (3.7.B.2)

Offside Front Tyre worn close to the legal limit (4.1.E.1)

Pass 11 May 2006 27,422 miles

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

Offside Rear Service brake: service brake efficiency only just met. It would appear that the braking system requires adjustment or repair. (3.7.B.7)

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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DET 666L is a 1973 Triumph Stag in Green with a 2,997cc petrol engine. This vehicle has been through 27 MOT tests with a personal pass rate of 74.1%.

Across all 1973 Triumph Stag models, the average MOT pass rate is 77.9% with a typical mileage of 53,671 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 DET 666L, 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 53 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 DET 666L?

You can check the full history of DET 666L by running a full vehicle check. This shows you finance, stolen, write-off, MOT history, mileage records and more.

What year was DET 666L registered?

DET 666L is a 1973 Triumph Stag, first registered on 5 June 1973.

Is DET 666L safe to buy?

The MOT history for DET 666L shows 27 tests with a 74.1% pass rate. To check for outstanding finance, stolen markers, write-off history and mileage discrepancies, run a full vehicle check.

Does DET 666L 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 DET 666L. 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.