What year Proton 1 5 SE is most reliable?

Based on MOT first-test pass rates, the 1991 Proton 1 5 SE has the highest pass rate at 72.6%, out of 449 vehicles tested.

What are the most common Proton 1 5 SE MOT failures?

The most common Proton 1 5 SE MOT failures vary by year. Check the individual year pages for detailed defect breakdowns — links in the table above.

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Proton 1 5 SE — Reliability by Year

2,334 vehicles · MOT data 1990–1993 · first-test pass rates

This page shows MOT first-test pass rates for each year the Proton 1 5 SE 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

72.6% pass rate · 449 vehicles

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Lowest pass rate year

1990

63.6% pass rate · 132 vehicles

Year	Pass rate	Avg mileage	Vehicles
1993	70.5%	76,182 mi	1,046
1992	71.5%	77,646 mi	707
1991	72.6%	82,475 mi	449
1990	63.6%	70,728 mi	132

Which year Proton 1 5 SE is most reliable?

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

Tests range from an average of 70,728 miles (newest year) to 82,475 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 Proton 1 5 SE.

See the buying guide →

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