Alfa Romeo 166 MOT Check

MOT pass rates, common failures, and reliability data for the Alfa Romeo 166. Check any 166 by registration number below.

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83.0%

Avg Pass Rate

+0.1%

vs Alfa Romeo Avg

Year Ranges

Good

Reliability

Alfa Romeo 166 — MOT Reliability Overview

The Alfa Romeo 166 has an average MOT pass rate of 83.0%, which is 0.1 percentage points above the Alfa Romeo brand average of 82.9%. This is a strong result, indicating that the 166 is well-engineered and tends to age well mechanically. Owners can expect fewer surprises at MOT time.

The most common reasons a Alfa Romeo 166 fails its MOT are a lamp missing, inoperative or in the case of a multiple light source more than 1/2 not functioning. If you are preparing your 166 for its MOT, checking these areas first could save you a retest fee. Our detailed fault analysis includes estimated repair costs for each failure type.

Before buying a used Alfa Romeo 166, we recommend checking the full MOT history, write-off status, outstanding finance, and stolen vehicle status. These checks can be done for free using the registration number.

MOT Pass Rate by Year

How the Alfa Romeo 166 performs at MOT across different model years.

2007

Based on 53 vehicles

88.7%Excellent

Alfa Romeo average: 82.9%

2006

Based on 106 vehicles

94.3%Excellent

Alfa Romeo average: 82.9%

Mileage at 10yr

181k mi

2005

Based on 93 vehicles

67.7%Average

Alfa Romeo average: 82.9%

Dangerous Defects

5.4%

Retest Rate

30.4%

2004

Based on 89 vehicles

75.3%Good

Alfa Romeo average: 82.9%

Dangerous Defects

1.9%

Retest Rate

15.1%

2003

Based on 274 vehicles

87.6%Excellent

Alfa Romeo average: 82.9%

Dangerous Defects

3.4%

Retest Rate

20.7%

Mileage at 10yr

155k mi

2002

Based on 65 vehicles

66.2%Average

Alfa Romeo average: 82.9%

Dangerous Defects

2.4%

Retest Rate

11.9%

2001

Based on 479 vehicles

91.9%Excellent

Alfa Romeo average: 82.9%

Dangerous Defects

11.9%

Retest Rate

13.6%

Mileage at 10yr

169k mi

2000

Based on 708 vehicles

87.6%Excellent

Alfa Romeo average: 82.9%

Dangerous Defects

8.8%

Retest Rate

32.4%

Mileage at 10yr

172k mi

1999

Based on 914 vehicles

90.6%Excellent

Alfa Romeo average: 82.9%

Dangerous Defects

2.7%

Retest Rate

16.2%

Mileage at 10yr

167k mi

1998

Based on 216 vehicles

89.4%Excellent

Alfa Romeo average: 82.9%

Mileage at 10yr

182k mi

0

Based on 271 vehicles

73.8%Average

Alfa Romeo average: 82.9%

Mileage at 5yr

106k mi

Top MOT Failures — Alfa Romeo 166

The most common reasons a Alfa Romeo 166 fails its MOT, aggregated across all year ranges.

A lamp missing, inoperative or in the case of a multiple light source more than 1/2 not functioning

14.4%

Alfa Romeo 166 Common Faults & Repair Costs

Other Alfa Romeo Models

Compare MOT reliability across Alfa Romeo models.

Alfa Romeo Giulietta 1.4 T 170

98.9% pass rate

Alfa Romeo Mito

74.2% pass rate

Alfa Romeo Brera

73.6% pass rate

Alfa Romeo 932

87.7% pass rate

Alfa Romeo 159 1.9 Jtd 16v 150 Sportwagon

88.6% pass rate

Alfa Romeo 147 1.6 Ts 105cv

92.6% pass rate

Useful MOT Guides

Common MOT Failures

The most common reasons UK vehicles fail their MOT — and how to prepare.

MOT Checklist

Pre-MOT checklist to improve your chances of passing first time.

Advisory vs Failure

Understanding the difference between MOT advisories and failures.

See detailed fault analysis for Alfa Romeo 166

Alfa Romeo 166 — Frequently Asked Questions

Common questions about the Alfa Romeo 166 MOT and reliability.

What is the MOT pass rate for the Alfa Romeo 166?

The average MOT pass rate for the Alfa Romeo 166 is 83.0% compared to the Alfa Romeo average of 82.9%. Pass rates vary by year — check the year-by-year breakdown on this page for details.

What are the most common MOT failures on a Alfa Romeo 166?

The most common MOT failures on the Alfa Romeo 166 are: A lamp missing, inoperative or in the case of a multiple light source more than 1/2 not functioning (14.4%). These are the components most likely to cause an MOT failure.

Is the Alfa Romeo 166 reliable?

With an average MOT pass rate of 83.0%, the Alfa Romeo 166 is rated as "Good" for reliability. This is a strong result suggesting good build quality and fewer common defects.

How do I check the MOT history of a Alfa Romeo 166?

Enter the vehicle's registration number in the search box at the top of this page. You will instantly see the complete MOT history including every test result, mileage readings, advisories, and dangerous defects — completely free.

What mileage should I expect on a Alfa Romeo 166?

Typical mileage for the Alfa Romeo 166: 181,163 miles at 10 years. Use these benchmarks when evaluating a used 166 to spot vehicles with unusually high or low mileage.

Check Your Alfa Romeo 166's MOT History

Enter the registration number for the full MOT history — free and instant.