What year Opel Monza is most reliable?

Based on MOT first-test pass rates, the 1982 Opel Monza has the highest pass rate at 73.0%, out of 111 vehicles tested.

What are the most common Opel Monza MOT failures?

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

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Opel Monza — Reliability by Year

228 vehicles · MOT data 1982–1985 · first-test pass rates

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

1982

73.0% pass rate · 111 vehicles

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Lowest pass rate year

1985

72.7% pass rate · 117 vehicles

Year	Pass rate	Avg mileage	Vehicles
1985	72.7%	95,350 mi	117
1982	73.0%	55,914 mi	111

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