What year Opel Manta GT is most reliable?

Based on MOT first-test pass rates, the 1986 Opel Manta GT has the highest pass rate at 100.0%, out of 752 vehicles tested.

What are the most common Opel Manta GT MOT failures?

The most common Opel Manta GT MOT failures vary by year. Check the individual year pages for detailed defect breakdowns — links in the table above.

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Opel Manta GT — Reliability by Year

3,768 vehicles · MOT data 1984–1988 · first-test pass rates

This page shows MOT first-test pass rates for each year the Opel Manta GT 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

1986

100.0% pass rate · 752 vehicles

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Lowest pass rate year

1988

28.1% pass rate · 393 vehicles

Year	Pass rate	Avg mileage	Vehicles
1988	28.1%	60,361 mi	393
1987	—	—	354
1986	100.0%	75,415 mi	752
1985	73.3%	62,583 mi	1,452
1984	81.2%	70,799 mi	817

Which year Opel Manta GT is most reliable?

MOT pass rate by year of manufacture — averaged across each vehicle's lifetime of tests. Green = noticeably above average for this model; red = noticeably below average.

Tests range from an average of 60,361 miles (newest year) to 75,415 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 Opel Manta GT.

See the buying guide →

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