Porsche 928 S MOT Check

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

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79.7%

Avg Pass Rate

-10.3%

vs Porsche Avg

Year Ranges

Good

Reliability

Porsche 928 S — MOT Reliability Overview

The Porsche 928 S has an average MOT pass rate of 79.7%, which is 10.3 percentage points below the Porsche brand average of 90.1%. This is a reasonable result that reflects typical UK reliability standards. Regular servicing and addressing advisories promptly will help keep your 928 S on the road.

The most common reasons a Porsche 928 S fails its MOT are an obligatory rear fog lamp missing, or a front or rear fog lamp inoperative or in the case of a multiple light source more than 1/2 not functioning. If you are preparing your 928 S 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 S, 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 S performs at MOT across different model years.

1992

Based on 64 vehicles

68.8%Average

Porsche average: 90.1%

Dangerous Defects

0.0%

Retest Rate

26.1%

1991

Based on 218 vehicles

81.7%Good

Porsche average: 90.1%

Dangerous Defects

0.0%

Retest Rate

9.7%

1990

Based on 159 vehicles

80.5%Good

Porsche average: 90.1%

Dangerous Defects

1.9%

Retest Rate

19.0%

1989

Based on 286 vehicles

84.6%Good

Porsche average: 90.1%

Dangerous Defects

0.5%

Retest Rate

17.9%

1988

Based on 333 vehicles

84.1%Good

Porsche average: 90.1%

Dangerous Defects

0.8%

Retest Rate

21.3%

1987

Based on 196 vehicles

83.2%Good

Porsche average: 90.1%

Dangerous Defects

0.7%

Retest Rate

12.9%

1986

Based on 253 vehicles

77.9%Good

Porsche average: 90.1%

Dangerous Defects

0.6%

Retest Rate

15.6%

1985

Based on 119 vehicles

79.0%Good

Porsche average: 90.1%

Dangerous Defects

1.3%

Retest Rate

51.3%

1984

Based on 173 vehicles

78.0%Good

Porsche average: 90.1%

Dangerous Defects

1.7%

Retest Rate

12.0%

1983

Based on 52 vehicles

76.9%Good

Porsche average: 90.1%

Dangerous Defects

0.0%

Retest Rate

17.9%

0

Based on 658 vehicles

82.5%Good

Porsche average: 90.1%

Mileage at 5yr

108k mi

Top MOT Failures — Porsche 928 S

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

An obligatory rear fog lamp missing, or a front or rear fog lamp inoperative or in the case of a multiple light source more than 1/2 not functioning

8.4%

Porsche 928 S Common Faults & Repair Costs

Where Failures Occur

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

Front Nearside

12.5%

Front Offside

6.3%

Rear Nearside Outer

3.1%

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 S

Porsche 928 S — Frequently Asked Questions

Common questions about the Porsche 928 S MOT and reliability.

What is the MOT pass rate for the Porsche 928 S?

The average MOT pass rate for the Porsche 928 S is 79.7% 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 S?

The most common MOT failures on the Porsche 928 S are: An obligatory rear fog lamp missing, or a front or rear fog lamp inoperative or in the case of a multiple light source more than 1/2 not functioning (8.4%). These are the components most likely to cause an MOT failure.

Is the Porsche 928 S reliable?

With an average MOT pass rate of 79.7%, the Porsche 928 S 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 Porsche 928 S?

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 S?

Typical mileage for the Porsche 928 S: 107,854 miles at 5 years. Use these benchmarks when evaluating a used 928 S to spot vehicles with unusually high or low mileage.

Check Your Porsche 928 S's MOT History

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