Get Started

Leyland Daf 400 Series Diesel Turbo — Reliability by Year

5,327 vehicles · MOT data 1989–1994 · first-test pass rates

This page shows MOT first-test pass rates for each year the Leyland Daf 400 Series Diesel Turbo was manufactured — click any year to explore that cohort in detail. Trying to decide which year to buy? See the full buying guide →

✓
Best pass rate year
1989
69.7% pass rate · 244 vehicles
⚠
Lowest pass rate year
1990
60.6% pass rate · 680 vehicles
Year Pass rate Avg mileage Vehicles
1994
62.6%
120,327 mi 971
1993
61.7%
118,775 mi 1,200
1992
63.5%
113,403 mi 1,378
1991
61.9%
95,880 mi 854
1990
60.6%
118,312 mi 680
1989
69.7%
144,662 mi 244

Which year Leyland Daf 400 Series Diesel Turbo is most reliable?

MOT pass rate by year of manufacture — averaged across each vehicle's lifetime of tests.

Tests range from an average of 95,880 miles (newest year) to 144,662 miles (oldest year). Older years naturally accumulate more tests at higher mileages — see the mileage-normalised breakdown →

Trying to decide which year to buy?

We've done the full analysis — which years to look for, which to avoid, and where to find the best value for reliability on a Leyland Daf 400 Series Diesel Turbo.

See the buying guide →

← All Leyland Daf models

Check any UK registration — free MOT history and risk insights.