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UYP 398S

1977 Triumph Stag

Blue Petrol 2997cc
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MOT Status

Valid
Expires29 Oct 2026
Tests27 (18 pass, 9 fail)
Pass rate66.7%

Mileage

68,322 mi
Last recorded68,322 miles
Recorded on30 Oct 2025
Typical for 1977 Triumph Stag60,708 mi

Above average mileage for this year

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

RegistrationUYP 398S
MakeTriumph
ModelStag
Year1977
ColourBlue
Fuel typePetrol
Engine2,997cc
View full Triumph Stag reliability data

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 9 fail
Pass 30 Oct 2025 68,322 miles

Nearside Rear Service brake binding but not excessively (1.2.1 (f))

Offside Windscreen wiper blade defective (3.4 (b) (i))

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

Oil leak, but not excessive Rear differential (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 3 Jul 2023 68,127 miles

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

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

Pass 27 May 2022 67,958 miles
Fail 26 May 2022 67,958 miles

Offside Rear Outer Drive shaft joint constant velocity boot split or insecure, no longer prevents the ingress of dirt (6.1.7 (g) (ii))

Exhaust has a minor leak of exhaust gases centre section (6.1.2 (a))

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 2 Sep 2021 67,880 miles

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

Nearside Front Seat belt webbing slightly damaged or frayed (7.1.2 (b) (ii))

Offside Front Seat belt webbing slightly damaged or frayed (7.1.2 (b) (ii))

accelerator pedal partially obscured by footwell speaker

Fail 2 Sep 2021 67,880 miles

Oil leaking excessively from engine (8.4.1 (a) (i))

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

Nearside Front Seat belt webbing slightly damaged or frayed (7.1.2 (b) (ii))

Offside Front Seat belt webbing slightly damaged or frayed (7.1.2 (b) (ii))

accelerator pedal partially obscured by footwell speaker

Pass 9 Jul 2019 67,477 miles
Fail 8 Jul 2019 67,477 miles

Oil leaking excessively from engine (8.4.1 (a) (i))

Pass 4 Jul 2018 67,110 miles

Oil leak, but not excessive close to excess (8.4.1 (a) (i))

Pass 4 Jul 2017 66,858 miles

Offside Rear Nail in tyre ()

Oil leak ()

nearside headlamp beam pattern poor

Fail 4 Jul 2017 66,858 miles

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

Nearside Headlamp aim too high (1.8)

Offside Headlamp aim too high (1.8)

Offside Rear Nail in tyre ()

Oil leak ()

nearside headlamp beam pattern poor

Pass 7 Jul 2016 66,650 miles

Steering column top bearing slightly worn (2.1.2c)

Pass 26 Jun 2015 66,046 miles

Oil leak

Steering column top bearing slightly worn (2.1.2c)

diff oil leak

Fail 26 Jun 2015

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

Nearside Front Steering system has a tyre fouling a part of the vehicle (2.2.D.2a)

Offside Inner Rear Drive shaft uj which forms part of the suspension has a loose flange bolt (2.4.G.4c)

Oil leak

Steering column top bearing slightly worn (2.1.2c)

diff oil leak

Pass 10 Jul 2014 66,082 miles

oil leaks

Fail 10 Jul 2014 66,082 miles

Nearside Rear Trailing arm has excessive play in a pin/bush (2.4.G.2)

Offside Rear Trailing arm has excessive play in a pin/bush (2.4.G.2)

oil leaks

Pass 1 Jul 2013 65,709 miles
Pass 3 Jul 2012 65,419 miles

Oil leak

rear diff leaking oil

Fail 30 Jun 2012 65,419 miles

Nearside Rear Rear wheel bearing rough when rotated (2.6.1)

Nearside Windscreen wiper does not clear the windscreen effectively (8.2.2)

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

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

Oil leak

rear diff leaking oil

rear drive shaft noisy

Pass 4 Jul 2011 65,155 miles

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

Pass 9 Jul 2010 64,905 miles
Fail 7 Jul 2009 64,559 miles

Nearside Side repeater not working (1.4.A.2c)

Pass 7 Jul 2009 64,559 miles
Pass 9 Jul 2008 64,356 miles

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

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

Fail 9 Jul 2008 64,355 miles

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

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

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

Pass 10 Jul 2007 64,078 miles
Pass 11 Jul 2006 63,417 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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UYP 398S is a 1977 Triumph Stag in Blue with a 2,997cc petrol engine. This vehicle has been through 27 MOT tests with a personal pass rate of 66.7%.

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 UYP 398S, 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 UYP 398S?

You can check the full history of UYP 398S by running a full vehicle check. This shows you finance, stolen, write-off, MOT history, mileage records and more.

What year was UYP 398S registered?

UYP 398S is a 1977 Triumph Stag, first registered on 1 December 1977.

Is UYP 398S safe to buy?

The MOT history for UYP 398S shows 27 tests with a 66.7% pass rate. To check for outstanding finance, stolen markers, write-off history and mileage discrepancies, run a full vehicle check.

Does UYP 398S 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 UYP 398S. 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.