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WMG 55T

1978 Triumph Stag Auto

Green Petrol 2997cc
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MOT Status

Valid
Expires7 Apr 2027
Tests17 (15 pass, 2 fail)
Pass rate88.2%

Mileage

46,478 mi
Last recorded46,478 miles
Recorded on17 Mar 2026
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

RegistrationWMG 55T
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

15 pass 2 fail
Pass 17 Mar 2026 46,478 miles
Pass 18 Mar 2025 44,299 miles

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

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

Parking brake efficiency only just met. It would appear that the braking system requires adjustment or repair. (1.4.2 (a) (i))

Pass 6 Apr 2024 41,935 miles
Pass 8 Apr 2023 38,367 miles
Pass 2 Oct 2017 37,268 miles

Both front wiper blades smearing slightly

Both headlamp aims on upper limit

Exhaust carbon monoxide level high

Indicator audible warning quiet

Pin hole in offside front track rod end gaiter

Pass 26 May 2016 37,247 miles

emissions high

headlight aims on upper limit

suspension dust covers age cracking

wipers smearing

Pass 16 Apr 2015 37,195 miles

Offside Front Track rod end ball joint dust cover damaged, but preventing the ingress of dirt (2.2.C.1c)

Pass 14 Apr 2014 37,064 miles

oil leak

slight movement in steering rack inner joints

track rod end ball joint dust covers perished

Pass 2 May 2013 36,772 miles

Nearside Track rod end ball joint dust cover damaged, but preventing the ingress of dirt (2.2.C.1c)

Offside Track rod end ball joint dust cover damaged, but preventing the ingress of dirt (2.2.C.1c)

Oil leak

Play in steering rack inner joint(s)

Fail 22 May 2012 36,457 miles

Exhaust has a minor leak of exhaust gases (7.1.2)

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

Nearside Rear wheel bearing has slight play (2.6.2)

Nearside Steering rack gaiter insecure (2.2.D.2d)

Nearside Track rod end ball joint dust cover damaged, but preventing the ingress of dirt (2.2.C.1c)

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

Offside Rear wheel bearing has slight play (2.6.2)

Offside Steering rack insecure (2.2.B.1a)

Offside Track rod end ball joint dust cover damaged, but preventing the ingress of dirt (2.2.C.1c)

Oil leak

Play in steering rack inner joint(s)

slight dampness on power steering rack

Pass 22 May 2012 36,457 miles

Exhaust has a minor leak of exhaust gases (7.1.2)

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

Nearside Rear wheel bearing has slight play (2.6.2)

Nearside Track rod end ball joint dust cover damaged, but preventing the ingress of dirt (2.2.C.1c)

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

Offside Rear wheel bearing has slight play (2.6.2)

Offside Track rod end ball joint dust cover damaged, but preventing the ingress of dirt (2.2.C.1c)

Oil leak

Play in steering rack inner joint(s)

slight dampness on power steering rack

Pass 27 May 2011 36,162 miles

both outer trackrod end dust covers split

dampness around engine sump

dampness to rear diff

slight age cracking to front drop link bushes

slight corrosion to all coil springs

very slight age cracking to tyres

very slight free play in o/s steering rack joint

very slight play in all wheel bearings

Pass 6 Apr 2010 35,443 miles

Offside Rear Sub-frame rubber bush deteriorated but not resulting in excessive movement (2.4.G.2)

Fail 1 Apr 2010 35,443 miles

Nearside Front Front suspension has excessive play in a lower suspension ball joint (2.5.B.1a)

Pass 3 Sep 2009 35,356 miles

Nearside Front Front suspension has slight play in a lower suspension ball joint (2.5.B.1a)

Nearside Rear Exhaust has part of the system slightly deteriorated (7.1.1a)

Suspension joint nearside lower dust cover split/missing

Suspension joint offside lower dust cover split/missing

Pass 17 Aug 2007 35,326 miles
Pass 31 May 2006 35,167 miles

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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WMG 55T is a 1978 Triumph Stag Auto in Green with a 2,997cc petrol engine. This vehicle has been through 17 MOT tests with a personal pass rate of 88.2%.

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 WMG 55T, 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 WMG 55T?

You can check the full history of WMG 55T by running a full vehicle check. This shows you finance, stolen, write-off, MOT history, mileage records and more.

What year was WMG 55T registered?

WMG 55T is a 1978 Triumph Stag Auto, first registered on 1 August 1978.

Is WMG 55T safe to buy?

The MOT history for WMG 55T shows 17 tests with a 88.2% pass rate. To check for outstanding finance, stolen markers, write-off history and mileage discrepancies, run a full vehicle check.

Does WMG 55T 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 WMG 55T. 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.