Porsche 928 MOT Check

MOT pass rates, common failures, and reliability data for the Porsche 928. Check any 928 by registration number below.

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86.0%

Avg Pass Rate

-4.0%

vs Porsche Avg

Year Ranges

Excellent

Reliability

Porsche 928 — MOT Reliability Overview

The Porsche 928 has an average MOT pass rate of 86.0%, which is 4.0 percentage points below the Porsche brand average of 90.1%. This is a strong result, indicating that the 928 is well-engineered and tends to age well mechanically. Owners can expect fewer surprises at MOT time.

The most common reasons a Porsche 928 fails its MOT are the aim of a headlamp is not within limits laid down in the requirements, lambda coefficient outside the default limits or the range specified by the manufacturer. If you are preparing your 928 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 Porsche 928, 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 Porsche 928 performs at MOT across different model years.

1995

Based on 151 vehicles

77.5%Good

Porsche average: 90.1%

Dangerous Defects

1.6%

Retest Rate

24.4%

1994

Based on 110 vehicles

85.5%Excellent

Porsche average: 90.1%

Dangerous Defects

0.0%

Retest Rate

5.3%

1993

Based on 73 vehicles

89.0%Excellent

Porsche average: 90.1%

Dangerous Defects

0.0%

Retest Rate

4.2%

1992

Based on 53 vehicles

92.5%Excellent

Porsche average: 90.1%

Dangerous Defects

0.0%

Retest Rate

10.8%

1991

Based on 55 vehicles

78.2%Good

Porsche average: 90.1%

Dangerous Defects

2.6%

Retest Rate

10.5%

1990

Based on 71 vehicles

90.1%Excellent

Porsche average: 90.1%

Dangerous Defects

1.9%

1989

Based on 122 vehicles

83.6%Good

Porsche average: 90.1%

Dangerous Defects

0.0%

Retest Rate

10.3%

1982

Based on 31 vehicles

93.5%Excellent

Porsche average: 90.1%

Dangerous Defects

0.0%

Retest Rate

3.6%

0

Based on 219 vehicles

84.5%Good

Porsche average: 90.1%

Mileage at 5yr

94k mi

Top MOT Failures — Porsche 928

The most common reasons a Porsche 928 fails its MOT, aggregated across all year ranges.

The aim of a headlamp is not within limits laid down in the requirements

16.9%

Lambda coefficient outside the default limits or the range specified by the manufacturer

9.9%

Porsche 928 Common Faults & Repair Costs

Where Failures Occur

The areas of the vehicle most commonly flagged during MOT inspections.

Front Nearside

2.6%

Rear Offside

2.0%

Rear Nearside Outer

2.0%

Other Porsche Models

Compare MOT reliability across Porsche models.

Porsche Cayman

95.7% pass rate

Porsche Carrera Coupe Sport

88.4% pass rate

Porsche 911 Carrera 4 S

100.0% pass rate

Porsche 911 Carrera

99.1% pass rate

Porsche Carrera Gt

87.5% pass rate

Porsche Panamera 4s E-hybrid S-a

86.8% 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 Porsche 928

Porsche 928 — Frequently Asked Questions

Common questions about the Porsche 928 MOT and reliability.

What is the MOT pass rate for the Porsche 928?

The average MOT pass rate for the Porsche 928 is 86.0% compared to the Porsche average of 90.1%. 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 Porsche 928?

The most common MOT failures on the Porsche 928 are: The aim of a headlamp is not within limits laid down in the requirements (16.9%), Lambda coefficient outside the default limits or the range specified by the manufacturer (9.9%). These are the components most likely to cause an MOT failure.

Is the Porsche 928 reliable?

With an average MOT pass rate of 86.0%, the Porsche 928 is rated as "Excellent" for reliability. This is a strong result suggesting good build quality and fewer common defects.

How do I check the MOT history of a Porsche 928?

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 Porsche 928?

Typical mileage for the Porsche 928: 94,483 miles at 5 years. Use these benchmarks when evaluating a used 928 to spot vehicles with unusually high or low mileage.

Check Your Porsche 928's MOT History

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