Dethleffs Unknown Reliability, MOT Pass Rate & Common Faults
Free Dethleffs Unknown car check
Is the Dethleffs Unknown reliable? We analysed 1,125 real MOT tests across 241 vehicles to find out.
Got a specific Dethleffs Unknown? Enter the reg for a free check:
The Dethleffs Unknown is above average for reliability based on real UK MOT data. Here's everything you need to know before buying a used Dethleffs Unknown.
Dethleffs Unknown Number Plates
Number plates registered to a Dethleffs Unknown. Click on any registration for full vehicle details — including MOT history, mileage records, previous owners and damage history.
Dethleffs Unknown MOT Pass Rate by Year
How likely is a Dethleffs Unknown to pass its MOT? Here's the pass rate for each registration year, newest first.
Dethleffs Unknown Mileage — What's Normal?
How many miles does a typical Dethleffs Unknown owner drive per year? Use this to check if a car you're looking at has suspiciously low or high mileage.
Dethleffs Unknown MOT Data by Registration Year
Full breakdown of pass rate and mileage for each year. Use this to compare the Dethleffs Unknown year you're looking at.
| Year | Tests | Pass Rate | Low Mi. | Typical Mi. | High Mi. |
|---|---|---|---|---|---|
| 2021 | 75 | 90.7% | 10,306 | 13,149 | 24,964 |
| 2020 | 193 | 91.2% | 7,767 | 12,568 | 19,180 |
| 2019 | 213 | 92.5% | 8,964 | 12,498 | 18,049 |
| 2018 | 65 | 92.3% | 7,512 | 12,098 | 20,230 |
| 2017 | 154 | 89.0% | 11,053 | 15,168 | 21,680 |
| 2016 | 241 | 90.9% | 11,802 | 16,361 | 25,003 |
| 2015 | 84 | 82.1% | 17,440 | 29,760 | 39,058 |
How Long Does a Dethleffs Unknown Last?
Based on 241 Dethleffs Unknown vehicles on UK roads.
Dethleffs Unknown Mileage Distribution
Total mileage recorded across all Dethleffs Unknown MOT tests. If the car you're looking at is above the 75th percentile, it's done more miles than most.
Best Year to Buy a Used Dethleffs Unknown
Based on MOT pass rates across all registration years with sufficient test data.
92.5% MOT pass rate from 213 tests
82.1% MOT pass rate from 84 tests
The best year to buy a used Dethleffs Unknown is 2019, which has the highest MOT pass rate at 92.5% across 213 tests. The 2015 model year has the lowest pass rate at 82.1% — if you're looking at one from that year, budget for potential repairs and get a thorough pre-purchase inspection.
How Does the Dethleffs Unknown Compare?
MOT pass rates compared to similar models. Click any model for the full breakdown.
| Model | Pass Rate | Tests | Typical Mileage | Lifespan |
|---|---|---|---|---|
| Dethleffs Unknown THIS CAR | 90.3% | 1,125 | 14,894 mi | 11 yrs |
| Dethleffs Trend | 89.4% | 1,003 | 17,972 mi | 11 yrs |
| Hyundai I40 SE Nav CRDI Blue Drive | 91.6% | 1,366 | 75,257 mi | — yrs |
| Honda Zoomer | 83.3% | 1,294 | 9,112 mi | 23 yrs |
| Lambretta Li 150 Special | 90.5% | 493 | 2,004 mi | 62 yrs |
Compared to the Dethleffs Trend (89.4% pass rate) and the Hyundai I40 SE Nav CRDI Blue Drive (91.6% pass rate), the Dethleffs Unknown sits in the middle of the pack on MOT reliability.
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Run a full vehicle history check on the specific car. See finance, stolen, write-off, mileage and MOT data for that exact vehicle.
Check a specific Dethleffs UnknownShould you buy a used Dethleffs Unknown?
The Dethleffs Unknown has an overall MOT pass rate of 90.3% across 1,125 real MOT tests — comfortably above the UK average, which puts it among the more reliable models on UK roads.
A typical Dethleffs Unknown owner drives around 2,591 miles per year. If the car you're looking at is significantly above this, expect more wear on suspension, brakes and tyres. If it's well below, the vehicle may have been sitting unused — check for perished rubber, corroded discs and stale fluids.
In terms of longevity, most Dethleffs Unknown models stay on UK roads for around 11 years. If you're buying one that's already approaching that window, the data suggests it has plenty of life left provided it's been maintained.
Before committing to a purchase, we recommend running a full vehicle history check on the specific car. This will reveal any outstanding finance, stolen markers, write-off history and mileage discrepancies that the seller may not disclose — and that the MOT data alone can't tell you.