Leyland Daf 400 Series Diesel Turbo Reliability, MOT Pass Rate & Common Faults
Free Leyland Daf 400 Series Diesel Turbo car check
Is the Leyland Daf 400 Series Diesel Turbo reliable? We analysed 5,137 real MOT tests across 991 vehicles to find out.
Got a specific Leyland Daf 400 Series Diesel Turbo? Enter the reg for a free check:
The Leyland Daf 400 Series Diesel Turbo is below average for reliability based on real UK MOT data. Common problems include service brake: efficiency below requirements, brake pipe excessively corroded and suspension component mounting prescribed area is excessively corroded. Here's everything you need to know before buying a used Leyland Daf 400 Series Diesel Turbo.
Leyland Daf 400 Series Diesel Turbo Number Plates
Number plates registered to a Leyland Daf 400 Series Diesel Turbo. Click on any registration for full vehicle details — including MOT history, mileage records, previous owners and damage history.
Leyland Daf 400 Series Diesel Turbo MOT Pass Rate by Year
How likely is a Leyland Daf 400 Series Diesel Turbo to pass its MOT? Here's the pass rate for each registration year, newest first.
Leyland Daf 400 Series Diesel Turbo Problems — What Goes Wrong?
The most common reasons a Leyland Daf 400 Series Diesel Turbo fails its MOT, ranked by how often they occur. Check for these problems before you buy.
Leyland Daf 400 Series Diesel Turbo Mileage — What's Normal?
How many miles does a typical Leyland Daf 400 Series Diesel Turbo owner drive per year? Use this to check if a car you're looking at has suspiciously low or high mileage.
Leyland Daf 400 Series Diesel Turbo MOT Data by Registration Year
Full breakdown of pass rate and mileage for each year. Use this to compare the Leyland Daf 400 Series Diesel Turbo year you're looking at.
| Year | Tests | Pass Rate | Low Mi. | Typical Mi. | High Mi. |
|---|---|---|---|---|---|
| 1994 | 1,765 | 61.0% | 89,933 | 116,947 | 144,298 |
| 1993 | 1,520 | 60.4% | 80,286 | 114,761 | 154,374 |
| 1992 | 1,133 | 63.9% | 86,494 | 115,607 | 157,164 |
| 1991 | 492 | 61.8% | 66,838 | 88,744 | 111,907 |
| 1990 | 192 | 60.9% | 78,180 | 108,781 | 140,786 |
How Long Does a Leyland Daf 400 Series Diesel Turbo Last?
Based on 991 Leyland Daf 400 Series Diesel Turbo vehicles on UK roads.
Leyland Daf 400 Series Diesel Turbo Mileage Distribution
Total mileage recorded across all Leyland Daf 400 Series Diesel Turbo 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 Leyland Daf 400 Series Diesel Turbo
Based on MOT pass rates across all registration years with sufficient test data.
63.9% MOT pass rate from 1,133 tests
60.4% MOT pass rate from 1,520 tests
The best year to buy a used Leyland Daf 400 Series Diesel Turbo is 1992, which has the highest MOT pass rate at 63.9% across 1,133 tests. The 1993 model year has the lowest pass rate at 60.4% — if you're looking at one from that year, budget for potential repairs and get a thorough pre-purchase inspection.
How Does the Leyland Daf 400 Series Diesel Turbo Compare?
MOT pass rates compared to similar models. Click any model for the full breakdown.
| Model | Pass Rate | Tests | Typical Mileage | Lifespan |
|---|---|---|---|---|
| Leyland Daf 400 Series Diesel Turbo THIS CAR | 61.6% | 5,137 | 112,996 mi | 36 yrs |
| Leyland Daf 400 Series Diesel | 60.5% | 13,935 | 97,292 mi | 37 yrs |
| Leyland Daf 200 Series Diesel | 62.6% | 6,901 | 99,748 mi | 37 yrs |
| Leyland Daf 400 Series | 63.7% | 2,361 | 66,838 mi | 37 yrs |
| Skoda Karoq SE Drive TSI S-a | 91.8% | 2,869 | 26,580 mi | — yrs |
Compared to the Leyland Daf 400 Series Diesel (60.5% pass rate) and the Leyland Daf 200 Series Diesel (62.6% pass rate), the Leyland Daf 400 Series Diesel Turbo 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 Leyland Daf 400 Series Diesel TurboShould you buy a used Leyland Daf 400 Series Diesel Turbo?
The Leyland Daf 400 Series Diesel Turbo has an overall MOT pass rate of 61.6% across 5,137 real MOT tests — below the UK average, so reliability should be a key concern.
The most common problems on the Leyland Daf 400 Series Diesel Turbo are service brake: efficiency below requirements (381 recorded failures), brake pipe excessively corroded (313), and suspension component mounting prescribed area is excessively corroded (312). 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 Leyland Daf 400 Series Diesel Turbo owner drives around 1,858 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 Leyland Daf 400 Series Diesel Turbo models stay on UK roads for around 36 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.