Fiat Dethleffs Reliability, MOT Pass Rate & Common Faults
Free Fiat Dethleffs car check
Is the Fiat Dethleffs reliable? We analysed 1,952 real MOT tests across 318 vehicles to find out.
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The Fiat Dethleffs is above average for reliability based on real UK MOT data. Common problems include headlamp aim beam image kick up to the offside, headlamp aim too low and registration plate lamp not working. Here's everything you need to know before buying a used Fiat Dethleffs.
Fiat Dethleffs Number Plates
Number plates registered to a Fiat Dethleffs. Click on any registration for full vehicle details — including MOT history, mileage records, previous owners and damage history.
Fiat Dethleffs MOT Pass Rate by Year
How likely is a Fiat Dethleffs to pass its MOT? Here's the pass rate for each registration year, newest first.
Fiat Dethleffs Problems — What Goes Wrong?
The most common reasons a Fiat Dethleffs fails its MOT, ranked by how often they occur. Check for these problems before you buy.
Fiat Dethleffs Mileage — What's Normal?
How many miles does a typical Fiat Dethleffs owner drive per year? Use this to check if a car you're looking at has suspiciously low or high mileage.
Fiat Dethleffs MOT Data by Registration Year
Full breakdown of pass rate and mileage for each year. Use this to compare the Fiat Dethleffs year you're looking at.
| Year | Tests | Pass Rate | Low Mi. | Typical Mi. | High Mi. |
|---|---|---|---|---|---|
| 2021 | 55 | 92.7% | 7,144 | 10,241 | 13,370 |
| 2020 | 126 | 87.3% | 7,642 | 12,512 | 17,432 |
| 2019 | 234 | 90.6% | 8,530 | 12,801 | 18,458 |
| 2018 | 446 | 92.8% | 9,120 | 14,638 | 21,716 |
| 2017 | 306 | 89.9% | 11,500 | 16,954 | 24,726 |
| 2016 | 50 | 80.0% | 12,250 | 17,651 | 21,740 |
| 2013 | 132 | 90.2% | 14,987 | 20,488 | 29,385 |
| 2012 | 65 | 87.7% | 14,259 | 22,137 | 29,718 |
| 2009 | 56 | 91.1% | 22,366 | 28,426 | 33,052 |
| 2007 | 75 | 88.0% | 22,444 | 31,920 | 45,912 |
How Long Does a Fiat Dethleffs Last?
Based on 318 Fiat Dethleffs vehicles on UK roads.
Fiat Dethleffs Mileage Distribution
Total mileage recorded across all Fiat Dethleffs 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 Fiat Dethleffs
Based on MOT pass rates across all registration years with sufficient test data.
92.8% MOT pass rate from 446 tests
80.0% MOT pass rate from 50 tests
The best year to buy a used Fiat Dethleffs is 2018, which has the highest MOT pass rate at 92.8% across 446 tests. The 2016 model year has the lowest pass rate at 80.0% — if you're looking at one from that year, budget for potential repairs and get a thorough pre-purchase inspection.
How Does the Fiat Dethleffs Compare?
MOT pass rates compared to similar models. Click any model for the full breakdown.
| Model | Pass Rate | Tests | Typical Mileage | Lifespan |
|---|---|---|---|---|
| Fiat Dethleffs THIS CAR | 88.6% | 1,952 | 17,710 mi | 19 yrs |
| Fiat Punto | 68.7% | 6,712,102 | 61,468 mi | 32 yrs |
| Fiat 500 | 76.9% | 3,854,072 | 42,469 mi | 18 yrs |
| Fiat Ducato | 75% | 1,962,737 | 48,690 mi | 38 yrs |
| Renault Clio D-que S M-nav Nrg DCI S/s | 79.6% | 1,895 | 72,063 mi | — yrs |
Compared to the Fiat Punto (68.7% pass rate) and the Fiat 500 (76.9% pass rate), the Fiat Dethleffs outperforms both on MOT reliability.
Found a Fiat Dethleffs you like?
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 Fiat DethleffsShould you buy a used Fiat Dethleffs?
The Fiat Dethleffs has an overall MOT pass rate of 88.6% across 1,952 real MOT tests — comfortably above the UK average, which puts it among the more reliable models on UK roads.
The most common problems on the Fiat Dethleffs are headlamp aim beam image kick up to the offside (11 recorded failures), headlamp aim too low (7), and registration plate lamp not working (6). These are the faults most likely to cause an MOT failure on this model, so check for them carefully on any test drive or pre-purchase inspection. Many are wear-and-tear items that can be budgeted for, but a car that's already failing on multiple fronts may signal neglected maintenance.
A typical Fiat Dethleffs owner drives around 2,587 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 Fiat Dethleffs models stay on UK roads for around 19 years — a strong showing that suggests solid build quality and readily available parts. 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.