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XBM 402S

1978 Triumph Stag Auto

Green Petrol 2997cc
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MOT Status

Valid
Expires1 Dec 2026
Tests13 (11 pass, 2 fail)
Pass rate84.6%

Mileage

14,507 mi
Last recorded14,507 miles
Recorded on2 Dec 2025
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
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Vehicle Details

RegistrationXBM 402S
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

11 pass 2 fail
Pass 2 Dec 2025 14,507 miles
Pass 15 Sep 2020 4,182 miles
Pass 11 Sep 2019 4,048 miles
Pass 28 Apr 2018 3,787 miles
Pass 4 May 2017 3,731 miles

Nearside Front wheel bearing has slight play (2.5.A.3c)

Offside Steering system has slight free play detected at steering wheel (2.2.A.1b)

Pass 21 Apr 2016 3,448 miles
Fail 15 Apr 2016 3,440 miles

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

Offside Front Suspension arm synthetic bush deteriorated resulting in excessive movement bacfk (2.4.G.2)

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

oil leak

Pass 27 Mar 2015 2,882 miles
Pass 4 Apr 2014 2,159 miles
Pass 5 Jan 2012 843 miles
Pass 18 Nov 2010 826 miles
Pass 14 Oct 2009 12 miles

Offside Headlamp not in good working order but not adversely affecting beam image (1.2.4a)

Oil leak

Fail 13 Oct 2009 5 miles

Nearside Front Wheel nut(s) missing (4.2.A.1e)

Nearside Rear Braking system leaking (3.6.A.1)

Offside Headlamp not in good working order but not adversely affecting beam image (1.2.4a)

Oil leak

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

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XBM 402S is a 1978 Triumph Stag Auto in Green with a 2,997cc petrol engine. This vehicle has been through 13 MOT tests with a personal pass rate of 84.6%.

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 performed better than the average for its year.

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 XBM 402S, 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 XBM 402S?

You can check the full history of XBM 402S by running a full vehicle check. This shows you finance, stolen, write-off, MOT history, mileage records and more.

What year was XBM 402S registered?

XBM 402S is a 1978 Triumph Stag Auto, first registered on 31 December 1978.

Is XBM 402S safe to buy?

The MOT history for XBM 402S shows 13 tests with a 84.6% pass rate. To check for outstanding finance, stolen markers, write-off history and mileage discrepancies, run a full vehicle check.

Does XBM 402S 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 XBM 402S. 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.