At a Glance
The Porsche 928 has 11 identified problems that occur more often than the UK average, with Fog lamp not working being the most reported. Electrical is the most common MOT failure category. Based on 23K MOT tests from DVSA data.
Problems are patterns in the DVSA data that occur significantly more often on this model than the UK average — confirmed at 99% statistical confidence. Read how we calculate MOT pass rates and problems →
Below: the full MOT-data picture for the Porsche 928 — MOT pass rate vs the UK average, common problems vs UK fleet patterns, the most likely MOT failures by frequency, fault occurrence by mileage band, and pass/fail trends. All numbers drawn from DVSA records.
Porsche 928 MOT Pass Rate
Across 23K MOT tests from DVSA data, the Porsche 928 (1977–1995) has a fail rate of 29.8%.
All-time UK average fail rate: 34.9%
Common Porsche 928 Problems
Owner-submitted reports plus patterns we've identified across 559 million UK MOT tests. Each MOT-derived item below — whether tagged as a Problem, Wear & Tear or Consumable — shows up noticeably more often on this generation than across the UK fleet, which is why it's here. Owner reports are pinned to the top by default; use the sort and filter pills below to view a specific tier or change the order.
Fog lamp not working
607
occurrences
Steering rack fault
519
occurrences
Brake hydraulic component worn
438
occurrences
Exhaust emissions above threshold (non-catalyst)
287
occurrences
Indicator fault
248
occurrences
Tell Us About Your Problem
Help other Porsche 928 owners — report a problem and we'll add it to the database
Tell Us About Your Problem
Help other Porsche 928 owners — report a problem and we'll add it to the database
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Problems by mileage
Common problems, MOT failures and advisories on the Porsche 928, grouped by the mileage they typically appear at.
495 distinct problems · 33,409 total occurrences in current filter
Filter by fuel and engine size to narrow down to your car.
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Advisory items are MOT tester observations. Frequency can be influenced by driving style and usage patterns.
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Frequently Asked Questions
What are the most common Porsche 928 problems?
Based on DVSA MOT data for the Porsche 928 928 (1977–1995), we have identified 11 common problems. The most frequently reported is "Fog lamp not working". Electrical is the most common MOT failure category.
How reliable is the Porsche 928?
This generation has 23K MOT tests on record with a 29.8% fail rate. A fault is flagged as a "Common Problem" only when it occurs significantly more often on this model than the UK average, confirmed at 99% statistical confidence.
What commonly fails the MOT on a Porsche 928?
There are 140 distinct MOT failure types recorded for the 928 (1977–1995), grouped by the mileage these failures typically occur. See the Common MOT Failures section on this page.
Can I report a problem with my Porsche 928?
Yes — use the "Tell Us About Your Problem" form on this page. Your report helps other Porsche 928 owners spot problems early. All submissions are reviewed before being added to the public database.
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