Is the Alfa romeo 166 reliable?

The Alfa romeo 166 has an average MOT pass rate of 71% across 7 years, based on 371 tests in 2026. That's 11 points below the national average of 82%. The most reliable year is 1999 with a 84% pass rate.

Which year Alfa romeo 166 is best?

The 1999 Alfa romeo 166 has the highest MOT pass rate at 84%, while the 2000 model has the lowest at 62%. There's a 22 percentage point spread between the best and worst years.

Alfa romeo 166

Reliability, running costs, and MOT data across 7 years from 371 real MOT tests.

Avg Pass Rate

71%

Total Tests

371

Best Year

1999 (84%)

Years Covered

About the Alfa romeo 166

The Alfa romeo 166 has been tested 371 times in 2026 MOT data across 7 model years (1999 to 2005), with an average pass rate of 71%. That's 11 points below the national average of 82%, so check the year-by-year data carefully before buying. Available as petrol.

Best and Worst Years

The 1999 model is the most reliable with a 84% pass rate from 43 tests. The 2000 model has the lowest at 62%. With a 22 point spread, choosing the right year makes a big difference to reliability.

Reliability Trend

Newer ALFA ROMEO 166s show better MOT pass rates than older ones, with an average improvement of 7 percentage points.

Mileage Across Years

The oldest model in our data (1999) averages 127,482 miles, while the newest (2005) averages 100,480 miles. Older models have covered serious mileage, so suspension and drivetrain wear are worth checking.

Compared to the Alfa romeo brand average of 80%, the 166 is 9 points lower, placing it among the less reliable Alfa romeo models.