What year Subaru Sumo 4WD is most reliable?

Based on MOT first-test pass rates, the 1991 Subaru Sumo 4WD has the highest pass rate at 90.3%, out of 387 vehicles tested.

What are the most common Subaru Sumo 4WD MOT failures?

The most common Subaru Sumo 4WD MOT failures vary by year. Check the individual year pages for detailed defect breakdowns — links in the table above.

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Subaru Sumo 4WD — Reliability by Year

1,633 vehicles · MOT data 1989–1993 · first-test pass rates

This page shows MOT first-test pass rates for each year the Subaru Sumo 4WD was manufactured — click any year to explore that cohort in detail. Trying to decide which year to buy? See the full buying guide →

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Best pass rate year

1991

90.3% pass rate · 387 vehicles

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Lowest pass rate year

1992

59.7% pass rate · 200 vehicles

Year	Pass rate	Avg mileage	Vehicles
1993	77.1%	82,684 mi	139
1992	59.7%	61,145 mi	200
1991	90.3%	42,688 mi	387
1990	61.1%	76,343 mi	456
1989	63.3%	84,093 mi	451

Which year Subaru Sumo 4WD is most reliable?

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

Tests range from an average of 42,688 miles (newest year) to 84,093 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 Subaru Sumo 4WD.

See the buying guide →

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