2001 Dennis Unknown 8.3L Diesel · SN51 AYM
2001 Dennis Unknown (8.3L, diesel). First registered 11 Oct 2001. Recorded mileage 455,195 miles. MOT expired on 07 Nov 2023. Currently declared SORN.
- Make & Model
- DENNIS UNKNOWN
- Year / Origin
- 2001 · Edinburgh
- Safety Recall
- Unknown
- MOT Status
- Expired on 07 Nov 2023
- Road Tax
- SORN
- Recorded Mileage
- 455,195 mi
- ULEZ Compliance
- Non-Compliant (Pre-Euro 6 Diesel)
- Fuel & Engine
- Diesel · 8.3L
- Reliability Guide
- Common Faults
Thinking of buying this vehicle? Free MOT and tax checks do not cover legal ownership. If outstanding finance exists, finance companies have legal right to repossess without compensation.
SN51 AYM Key Findings
- 2 MOT tests recorded
- Latest MOT passed on 08/11/2022
- 455,195 miles recorded at latest MOT
- 1 historical MOT failure
- 6 defects noted at the latest MOT
- Recurring lighting items (6 mentions)
Derived directly from the recorded DVSA and DVLA data shown on this page.
SN51 AYM MOT History
Interpretation generated from the recorded test data above — not an official DVSA statement and not a substitute for an independent inspection.
2 MOT tests are recorded for this 2001 Dennis Unknown (SN51 AYM) between November 2022 and November 2022.
The record contains 1 pass and 1 failure.
The most recent test on 08 November 2022 was a pass, although the earlier record includes 1 failure that buyers may want to investigate.
Across all tests, the most frequently flagged areas are: Lighting (6 issues), Bodywork (2 issues), Suspension (2 issues), Windscreen (1 issue). Repeated mentions in one area can indicate an ongoing pattern worth checking in person.
In total 10 advisory notices are recorded. Advisories flag items that passed but may need attention before the next test; they are not evidence of how well the vehicle has been serviced.
SN51 AYM Mileage History
- 08/11/2022455,195 mi
- 08/11/2022455,195 mi
Average of roughly 0 miles per year across 2 recorded odometer readings.
Technical Specifications
Core Specifications
Identification & Status
Dimensions & Weights
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MOT Roadworthiness: Below Average
This rating reflects historical MOT pass rates and recurring advisory wear patterns from official DVSA test logs. Note that roadworthiness does not verify outstanding finance, insurance write-offs, or stolen records.
Verify lender finance agreements, insurance write-offs, police stolen registers, and mileage rollback.
Buyer's Guide & Inspection Advisory
Expert automotive synthesis from historical MOT defect records and market benchmarks.
Our Verdict
Approach this vehicle with extreme caution; it is a heavy-duty commercial vehicle with significant age and structural concerns. Unless you are a specialist collector or have the facilities for heavy-plant restoration, this is likely a high-risk purchase.
When inspecting this vehicle, prioritise the structural integrity of the chassis. The MOT history explicitly notes that the vehicle structure is corroded front to rear, which is a major red flag for a vehicle of this size and age. You should arrange for a specialist familiar with Dennis commercial chassis to perform a lift-inspection to assess the extent of the rust.
Check for any evidence of recent maintenance, as there is a notable gap in MOT history since November 2022. Verify the functionality of all auxiliary systems, such as the windscreen washer and lighting, as these have previously been identified as points of failure. Negotiate heavily based on the requirement for immediate structural and mechanical remedial work.
Running a vehicle of this scale is significantly more expensive than a standard passenger car. The 8268cc diesel engine will be extremely thirsty, and you should expect very low fuel economy figures. Furthermore, insurance will require a specialist commercial policy, which can be difficult and costly to arrange for a vehicle of this vintage.
Maintenance costs are likely to be high due to the scarcity of parts for a 2001 Dennis and the labour-intensive nature of working on such a large engine. You should budget for heavy-duty tyres, specialist fluids, and potential welding repairs to address the reported corrosion. Annual running costs, excluding major repairs, would realistically exceed £3,000-£4,000 depending on usage.
Focus your inspection on the underside; the MOT history highlights 'vehicle underside generally rusted' and structural corrosion. Check the suspension components, specifically the drag link end ball joints and shock absorbers, which were flagged with play and rust in the most recent test.
Test all electrical systems, as the registration plate lamps and windscreen washer system have shown signs of failure. Given the massive 8268cc engine, ensure the cooling system is free of leaks and that the engine starts reliably from cold, as major mechanical repairs on this scale are prohibitively expensive.
This 2001 Dennis, finished in maroon, is a heavy-duty diesel vehicle with an odometer reading exceeding 455,000 miles. The MOT history highlights recurring structural corrosion issues and mechanical wear consistent with its age and commercial usage. Given the lack of recent MOT records since late 2022 and the nature of its structural advisories, this vehicle requires a comprehensive professional inspection before any commitment.
As a commercial Dennis vehicle, reliability is typically tied to a strict, professional maintenance schedule; however, the MOT data suggests this unit is suffering from age-related degradation.
Reviewed by the IsItAGoodCar editorial team — Verified automotive analysis synthesized from official vehicle registries.
Data Sources
DVSA
Official MOT test logs & failure reasons
DVLA
Tax, registration & powertrain specs
Experian
Finance, stolen markers & total loss
AI Analysis
Historical fault & advisory patterns
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