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UNN 509S

1977 Triumph Dolomite

Brown Petrol 1854cc
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MOT Status

Valid
Expires27 May 2027
Tests22 (21 pass, 1 fail)
Pass rate95.5%

Mileage

42,873 mi
Last recorded42,873 miles
Recorded on26 May 2026
Typical for 1977 Triumph Dolomite56,560 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

RegistrationUNN 509S
MakeTriumph
ModelDolomite
Year1977
ColourBrown
Fuel typePetrol
Engine1,854cc

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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

21 pass 1 fail
Pass 26 May 2026 42,873 miles
Pass 21 May 2025 41,058 miles
Pass 20 May 2024 39,647 miles
Pass 24 May 2023 37,853 miles
Pass 25 May 2022 36,433 miles
Pass 28 May 2021 35,206 miles
Pass 23 May 2020 34,244 miles
Pass 28 Feb 2019 32,109 miles
Pass 14 May 2018 30,255 miles

slight lift in n/s/f lower ball joint.

Pass 2 May 2017 30,112 miles
Pass 23 May 2016 29,153 miles
Fail 23 May 2016 29,149 miles

Nearside Front Shock absorber has a serious fluid leak (2.7.3)

Pass 18 May 2015 28,314 miles
Pass 23 May 2014 27,636 miles
Pass 10 May 2013 26,874 miles
Pass 15 May 2012 26,487 miles

n/s/f top ball joint gaitor split .

Pass 3 May 2011 25,511 miles
Pass 7 May 2010 24,561 miles
Pass 8 May 2009 22,852 miles
Pass 2 May 2008 21,243 miles
Pass 4 May 2007 18,973 miles
Pass 5 May 2006 16,482 miles

How Reliable is the Triumph Dolomite?

Based on 17,210 MOT tests across 2,188 vehicles.

72.4%
Pass Rate
575
Miles/Year
54
Year Lifespan
2,188
On UK Roads

Top MOT Failure Points

Suspension component mounting prescribed area is excessively corroded 855
Windscreen washer provides insufficient washer liquid 681
Exhaust emissions carbon monoxide content excessive 669
Parking brake: efficiency below requirements 625
brake binding 589
Full Triumph Dolomite reliability report

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UNN 509S is a 1977 Triumph Dolomite in Brown with a 1,854cc petrol engine. This vehicle has been through 22 MOT tests with a personal pass rate of 95.5%.

Across all 1977 Triumph Dolomite models, the average MOT pass rate is 71.4% with a typical mileage of 56,560 miles. This particular vehicle has performed better than the average for its year.

The most common reason a Triumph Dolomite fails its MOT is suspension component mounting prescribed area is excessively corroded, accounting for 855 recorded failures. If you're considering buying UNN 509S, it's worth having these areas checked by a mechanic before committing.

The Triumph Dolomite typically stays on UK roads for around 54 years. At 49 years old, this Triumph Dolomite is approaching the upper end of the typical lifespan for this model.

Frequently Asked Questions

How do I check the history of UNN 509S?

You can check the full history of UNN 509S by running a full vehicle check. This shows you finance, stolen, write-off, MOT history, mileage records and more.

What year was UNN 509S registered?

UNN 509S is a 1977 Triumph Dolomite, first registered on 1 August 1977.

Is UNN 509S safe to buy?

The MOT history for UNN 509S shows 22 tests with a 95.5% pass rate. To check for outstanding finance, stolen markers, write-off history and mileage discrepancies, run a full vehicle check.

Does UNN 509S 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 UNN 509S. 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.