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SER 426S

1977 Triumph Stag

Red Petrol 2997cc
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MOT Status

Valid
Expires20 Sep 2027
Tests14 (8 pass, 6 fail)
Pass rate57.1%

Mileage

74,528 mi
Last recorded74,528 miles
Recorded on21 Sep 2026
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

RegistrationSER 426S
MakeTriumph
ModelStag
Year1977
ColourRed
Fuel typePetrol
Engine2,997cc

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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

8 pass 6 fail
Pass 21 Sep 2026 74,528 miles

Nearside Front Lower Suspension arm ball joint has slight play (5.3.4 (a) (i))

Fail 21 Sep 2026 74,528 miles

Nearside Front Lower Suspension arm ball joint has slight play (5.3.4 (a) (i))

Offside Rear Position lamp adversely affected by the operation of another lamp (4.2.3 (c))

Offside Rear Stop lamp(s) adversely affected by the operation of another lamp (4.3.3 (b))

Pass 22 Jul 2025 73,852 miles
Pass 16 Jun 2020 73,372 miles

offside front box section on floor heavily corroded but not regarded as a structural point

Fail 11 Jun 2020 73,371 miles

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

Front Fuel pipe leaking excessively or a risk of fire (6.1.3 (b) (ii)) DANGEROUS

offside front box section on floor heavily corroded but not regarded as a structural point

offside side repeater not working

Pass 6 Aug 2019 73,357 miles
Fail 31 Jul 2019 73,357 miles

Exhaust emissions carbon monoxide content excessive 8.85% (8.2.1.2 (b))

Nearside Headlamp aim projected beam image is obviously incorrect no pattern (4.1.2 (c))

Offside Headlamp aim too high (4.1.2 (a))

Pass 4 Apr 2018 73,051 miles
Fail 4 Apr 2018 73,051 miles

Nearside Headlamp aim beam image obviously incorrect (1.8.A.1b)

Pass 1 Apr 2017 73,038 miles
Pass 18 Jul 2012 72,670 miles
Fail 17 Jul 2012 72,670 miles

Nearside Rear Direction indicator not working (1.4.A.2c)

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

Offside Rear Direction indicator incorrect colour (1.4.A.2f)

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

Nearside Front Tyre has a cut in excess of the requirements deep enough to reach the ply or cords (4.1.D.1a) DANGEROUS

Nearside Rear Tyre has a cut in excess of the requirements deep enough to reach the ply or cords (4.1.D.1a) DANGEROUS

Brakes imbalanced requirements only just met. It would appear that the braking system requires adjustment or repair. (3.7.B.5b)

Pass 31 May 2007 72,319 miles
Fail 30 May 2007 72,319 miles

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

Hazard warning lamps not flashing in phase, with ignition off (1.4.B.1f)

Hazard warning lamps not flashing in phase, with ignition on (1.4.B.1f)

Nearside Rear Direction indicator not working (1.4.A.2c)

Offside Stop lamp not working (1.2.1b)

Rear Mechanical brake component has restricted free movement (3.5.1k)

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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SER 426S is a 1977 Triumph Stag in Red with a 2,997cc petrol engine. This vehicle has been through 14 MOT tests with a personal pass rate of 57.1%.

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 SER 426S, 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 SER 426S?

You can check the full history of SER 426S by running a full vehicle check. This shows you finance, stolen, write-off, MOT history, mileage records and more.

What year was SER 426S registered?

SER 426S is a 1977 Triumph Stag, first registered on 8 December 1977.

Is SER 426S safe to buy?

The MOT history for SER 426S shows 14 tests with a 57.1% pass rate. To check for outstanding finance, stolen markers, write-off history and mileage discrepancies, run a full vehicle check.

Does SER 426S 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 SER 426S. 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.