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S840 CDM

1998 Triumph Thunderbird

Red Petrol 885cc
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MOT Status

Valid
Expires4 Nov 2026
Tests18 (14 pass, 4 fail)
Pass rate77.8%

Mileage

16,334 mi
Last recorded16,334 miles
Recorded on5 Nov 2025
Typical for 1998 Triumph Thunderbird15,472 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

RegistrationS840 CDM
MakeTriumph
ModelThunderbird
Year1998
ColourRed
Fuel typePetrol
Engine885cc

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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

14 pass 4 fail
Pass 5 Nov 2025 16,334 miles
Fail 4 Nov 2025 16,334 miles

Nearside Rear Direction indicator not working (4.4.1 (a) (ii))

Pass 12 Jul 2018 14,525 miles
Pass 18 Jul 2017 14,484 miles
Pass 15 Jul 2016 13,146 miles
Fail 14 Jul 2016 13,146 miles

Front Front shock absorber seal failed and leaking oil (2.3.3)

Pass 30 Jun 2015 13,066 miles

Nearside Front shock absorber has light misting of stanchion (2.3.3)

Steering movement slightly stiff (2.2.1a)

Pass 13 May 2014 12,913 miles
Pass 13 May 2013 12,567 miles
Pass 10 May 2012 12,110 miles
Pass 16 May 2011 11,953 miles

number plate light not working

Pass 18 May 2010 11,383 miles
Pass 6 May 2009 10,608 miles

Drive chain slightly loose (6.2.1d)

Pass 16 May 2008 10,105 miles
Pass 18 May 2007 9,427 miles
Fail 30 Apr 2007 9,416 miles

Nearside Front shock absorber seal failed and leaking oil (2.3.3)

Pass 20 Apr 2006 8,357 miles
Fail 20 Apr 2006 8,357 miles

Front Headlamp aim too high when the centre of the headlamp is above 850mm from the ground (1.6.3)

How Reliable is the Triumph Thunderbird?

Based on 66,789 MOT tests across 6,108 vehicles.

89.1%
Pass Rate
540
Miles/Year
31
Year Lifespan
6,108
On UK Roads

Top MOT Failure Points

Tyre tread depth is below minimum requirements of 1.0mm 473
shock absorber seal failed and leaking oil 371
Stop lamp does not illuminate immediately a brake applies 285
Brake pad(s) less than 1.5 mm thick 249
Roller brake test indicates a binding brake 173
Full Triumph Thunderbird reliability report

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S840 CDM is a 1998 Triumph Thunderbird in Red with a 885cc petrol engine. This vehicle has been through 18 MOT tests with a personal pass rate of 77.8%.

Across all 1998 Triumph Thunderbird models, the average MOT pass rate is 88.3% with a typical mileage of 15,472 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 Thunderbird fails its MOT is tyre tread depth is below minimum requirements of 1.0mm, accounting for 473 recorded failures. If you're considering buying S840 CDM, it's worth having these areas checked by a mechanic before committing.

The Triumph Thunderbird typically stays on UK roads for around 31 years. At 28 years old, this Triumph Thunderbird is approaching the upper end of the typical lifespan for this model.

Frequently Asked Questions

How do I check the history of S840 CDM?

You can check the full history of S840 CDM by running a full vehicle check. This shows you finance, stolen, write-off, MOT history, mileage records and more.

What year was S840 CDM registered?

S840 CDM is a 1998 Triumph Thunderbird, first registered on 15 September 1998.

Is S840 CDM safe to buy?

The MOT history for S840 CDM shows 18 tests with a 77.8% pass rate. To check for outstanding finance, stolen markers, write-off history and mileage discrepancies, run a full vehicle check.

Does S840 CDM 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 S840 CDM. 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.