What year Opel Monza is most reliable?

Based on MOT first-test pass rates, the 1985 Opel Monza has the highest pass rate at 69.6%, out of 117 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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228 vehicles · MOT data 1982–1985 · first-test pass rates

Best pass rate year

1985

69.6% first-test pass rate · 117 vehicles

Lowest pass rate year

1982

7.9% first-test pass rate · 111 vehicles

Year	Pass rate	Avg mileage	Vehicles
1985	69.6%	95,350 mi	117
1982	7.9%	55,914 mi	111

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