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Porsche 928 reliability by build year

Coverage 1977-19951 named generationCoupePETROL

We've only got 749 MOT tests for Porsche 928 models built before 2000 (over 25 years old). Treat these numbers as a rough guide.

At a glance

Porsche 928 built before 2000: about average at the MOT

Porsche 928 models built before 2000 fail their MOT about as often as similar cars the same age. An independent inspection matters more than the wider numbers on cars this old.

Check a Porsche 928 by number plate

Key figure

17% of MOT tests on Porsche 928 models built before 2000 ended in a fail (retests included), against 19% for similar cars the same age.

Most common issue

The most common MOT issue on Porsche 928 models built before 2000 involves fluid leaks.

Before you view it

What to check before viewing

The Porsche 928's most common MOT issues, turned into things to ask about or look for.

Leaks

Worth checking

Inspect the leaks carefully and ask the seller for repair history.

Tyres

Worth checking

Check tread depth across the full width on all four; uneven wear suggests alignment or suspension issues.

Suspension bushes and joints

Worth checking

Listen for knocks over speed bumps and ask about recent control-arm or anti-roll-bar work.

Axles & Wheels

Worth checking

Inspect the axles & wheels carefully and ask the seller for repair history.

Vehicle-specific check

Worth checking

Check the car’s number plate on MOT Wise to see its own MOT history and any recalls for its build years.

By build year

How build years differ

Fail rates have been steady over the last three years. Use the build-year guide below to separate newer build years from older ones.

Find your 928's generation

Each card below is a different generation. Select your year and we'll highlight the match.

928 Classic

Classic (1977-1995)

Excellent
PETROL

16.7% fail rate, built before 2000 (over 25 years old)

Likely between 14.2% and 19.5%

Fails less often than the average car this age (about 1 in 4 MOTs, 25.2%)

From 749 MOT tests at this ageView details →

By age

Porsche 928 fail rate by age

This chart combines every Porsche 928 ever sold. It's good for the big picture. For one generation, scroll up to the build-year cards.

Below typicalAbove typicalHigh (28% or more)Highest fail rate
Age / builtFail rateMOT tests
25+ yearsbuilt 2000 or earlier
74916.7%

Fail rate is the share of MOT tests that ended in a fail. Retests count as tests. How we count fail rates Build years are worked out from age, so they are approximate. Tests counted are 2025 MOTs. Highest fail rate at 25+ years old.

All generations of this model

What goes wrong most often on 25+ year old Porsche 928 models

These issues come from 25+ year old Porsche 928 models, every generation combined.

All generations of this modelNot much data

Most common advisories and fails

In order of the share of MOT tests that recorded each one

  1. 1
    Advisory

    Oil leak, but not excessive

    15.9%
    Advisory: 140Fail: 2 (1% of the times it was found)
  2. 2
    Advisory

    Wheel bearing has slight play

    5.1%
    Advisory: 46Fail: 1 (2% of the times it was found)
  3. 3
    Advisory

    Suspension arm pin or bush worn, but not moving too much

    4.9%
    Advisory: 56Fail: 2 (3% of the times it was found)
  4. 4
    Advisory

    Tyre slightly damaged, cracking or perishing

    3.9%
    Advisory: 60Fail: 4 (6% of the times it was found)
  5. 5
    Advisory

    Coil spring corroded

    3.9%
    Advisory: 44Fail: 2 (4% of the times it was found)

Based on 749 MOT tests on 25+ year old Porsche 928 models, every generation combined.

All generations of this model

Issues that often appear together

The pairs seen most often when an MOT on 25+ year old Porsche 928 models notes problems with more than one part of the car.

Issues that often appear together on this model

All generations of this modelEnough data
  1. Fuel & oil + Suspension20%
  2. Brakes + Fuel & oil18%
  3. Brakes + Suspension18%
  4. Brakes + Other17%

Both were noted at the same test. That doesn't mean one caused the other.

Across 252 MOT tests on Porsche 928 cars built before 2000 (over 25 years old) where more than one part of the car was noted.

Still registered

How many are still registered, and recalls

How many of these are still registered in the UK, and what's been recalled across the model.

How many are still registered

Not enough registration data to show this for the Porsche 928.

The share still registered can reflect demand, the cost of repairs, exports, write-offs and how owners use the car. It isn't proof of how long the car lasts mechanically.

Recall context

DVSA's recall list has no recalls filed under the Porsche 928 name. For the exact car, check with the maker or GOV.UK's recall checker.

Like-for-like

Other coupes to compare

Other coupes to compare

  1. 1

    Jaguar E-Type

    Same body type, tested at the same age

    Fail rate
    8.8%
    Fail, no pass in 3 days
    4.1%
    Dangerous
    1.8%

    Lower fail rate: 8.8%, against 16.7% for the Porsche 928, both built before 2000.

    1,235 MOT tests on cars built before 2000

  2. 2

    MG B GT

    Same body type, tested at the same age

    Fail rate
    15.4%

    No clear edge over the Porsche 928 on these figures.

    Some figures could not be compared for these two cars. So this comparison uses the fail rate and recalls only.

    1,331 MOT tests on cars built before 2000

  3. 3

    Jaguar XK

    Same body type, tested at the same age

    Fail rate
    23.1%

    No clear edge over the Porsche 928 on these figures.

    Some figures could not be compared for these two cars. So this comparison uses the fail rate and recalls only.

    3,434 MOT tests on cars built before 2000

  4. 4

    Mercedes-Benz CLK

    Same body type, tested at the same age

    Fail rate
    24.8%

    No clear edge over the Porsche 928 on these figures.

    Some figures could not be compared for these two cars. So this comparison uses the fail rate and recalls only.

    1,725 MOT tests on cars built before 2000

Fail rate
= the share of MOT tests that ended in a fail. Retests count as tests.
Fail, no pass in 3 days
= the share of MOT tests that failed and still hadn't passed 3 days later. A fail that passed a retest within 3 days, even the same day, isn't counted.
Dangerous
= the share of MOT tests where the tester marked a fault as dangerous. It is against the law to drive the car until it is fixed.

Common questions

Frequently asked questions

Built before 2000 (over 25 years old), the Porsche 928 across all generations combined fails MOTs noticeably less often than typical for this age. This is based on 749 25+ year old MOT tests from DVSA data. Each retest counts as a test.

These figures come from DVSA's MOT records. Across every Porsche 928 ever sold: 749 tests. The main figures are for cars built before 2000 (over 25 years old): 749 tests. They are a guide, not a guarantee. Always inspect the car or have a mechanic check it.