Fiat Dethleffs
Reliability, running costs, and MOT data across 4 years from 327 real MOT tests.
Avg Pass Rate
90%
Total Tests
327
Best Year
2018 (94%)
Years Covered
4
How reliable is the Fiat Dethleffs?
Fiat Dethleffs by Year
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About the Fiat Dethleffs
The Fiat Dethleffs has been tested 327 times in 2024 MOT data across 4 model years (2017 to 2020), with an average pass rate of 90%. That's comfortably above the national average of 82%, making it a reliable choice. Available as diesel.
Best and Worst Years
The 2018 model is the most reliable with a 94% pass rate from 118 tests. The 2017 model has the lowest at 86%. The 8 point spread between years means reliability varies somewhat, but no year is dramatically different.
Reliability Trend
Newer FIAT DETHLEFFSs show better MOT pass rates than older ones, with an average improvement of 6 percentage points.
Mileage Across Years
The oldest model in our data (2017) averages 19,963 miles, while the newest (2020) averages 13,034 miles.
Compared to the Fiat brand average of 83%, the Dethleffs performs 7 points better, making it one of the more reliable options in the Fiat range.
Click any year in the table above to see detailed running costs, individual reliability data, and comparisons with similar cars.