What year Porsche 928 S Auto is most reliable?

Based on MOT first-test pass rates, the 1982 Porsche 928 S Auto has the highest pass rate at 92.5%, out of 123 vehicles tested.

What are the most common Porsche 928 S Auto MOT failures?

The most common Porsche 928 S Auto MOT failures vary by year. Check the individual year pages for detailed defect breakdowns — links in the table above.

CarHunch

Get Started

Porsche 928 S Auto — Reliability by Year

633 vehicles · MOT data 1982–1986 · first-test pass rates

This page shows MOT first-test pass rates for each year the Porsche 928 S Auto was manufactured — click any year to explore that cohort in detail. Trying to decide which year to buy? See the full buying guide →

✓

Best pass rate year

1982

92.5% pass rate · 123 vehicles

⚠

Lowest pass rate year

1983

56.9% pass rate · 139 vehicles

Year	Pass rate	Avg mileage	Vehicles
1986	75.7%	124,970 mi	135
1985	63.2%	138,344 mi	128
1984	79.1%	118,194 mi	108
1983	56.9%	113,599 mi	139
1982	92.5%	130,143 mi	123

Which year Porsche 928 S Auto 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 113,599 miles (newest year) to 138,344 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 Porsche 928 S Auto.

See the buying guide →

← All Porsche models

Check any UK registration — free MOT history and risk insights.