DVSA Statistics
1978 Porsche 928
MOT Pass Rate & Pre-MOT Checklist
There isn't much MOT data yet for the 1978 Porsche 928 (only 3 tests in our DVSA dataset), so these figures are a rough guide. We still highlight common failure items below so you can check before your MOT.
Pass Rate
Based on 3 DVSA anonymised MOT tests · About this data
Pass Rate
66.7%
About average
Limited data available for this model; results may be less representative.
Top Failure Reasons
Common MOT failures for this model
Quick DIY Fix
Windscreen wipers are easy to replace yourself.
Based on DVSA statistics from 3 recorded tests.
Pre-MOT Checklist for 1978 Porsche 928
Based on common failure points for this model, check these items before your MOT:
- 1
Ensure engine is at operating temperature before test - take a good run beforehand
Emissions – Common fail on this model
- 2
Visually inspect coil springs for cracks or broken coils
Suspension – Common fail on this model
- 3
Visually check brake discs for scoring, cracks, or excessive lip
Brakes – Common fail on this model
How Does This Compare to Other Years?
See how this 1978 model compares to the next model year.
Why Trust This Data?
Official UK Government Source
This data comes from the UK's Driver and Vehicle Standards Agency (DVSA), the official body responsible for MOT testing standards. The anonymised MOT test data is published via data.gov.uk.
Understanding the Statistics
This page is based on 3 MOT tests from the 2023 DVSA dataset. Your 1978 Porsche 928 was 45 years old when this data was collected and is now 48 years old.
Sample Size
Limited data - 3 tests (use as rough guide only)
Limitations
Statistics reflect average outcomes and don't account for maintenance history, mileage, or regional variations. Individual results will vary based on how well a vehicle has been maintained.
Do you own this car?
Check your specific vehicle for outstanding advisories or recalls. Get a personalized risk report for your exact Porsche 928.
Frequently Asked Questions
Is a 1978 Porsche 928 likely to fail its MOT?
Based on DVSA statistics, the 1978 Porsche 928 has a 66.7% MOT pass rate. This is about average for vehicles of this age.
What are the most common MOT failures on a 1978 Porsche 928?
The most common MOT failure reasons for a 1978 Porsche 928 are: emissions levels exceed default limits, a spring or spring component fractured or seriously weakened, a wheel bearing with excessive play. Many of these can be checked and fixed before your test to improve your chances of passing.
How can I reduce the chance my 1978 Porsche 928 fails its MOT?
To improve your chances of passing, check the items that commonly fail on this model: emissions levels exceed default limits, a spring or spring component fractured or seriously weakened, a wheel bearing with excessive play. Use our pre-MOT checklist above to identify potential issues before your test. Many common failures are easy DIY fixes.
How many 1978 Porsche 928s fail their MOT?
Around 33% of 1978 Porsche 928s fail their MOT test, meaning roughly 1 in 3 don't pass first time. The most common reasons are emissions levels exceed default limits and a spring or spring component fractured or seriously weakened. Pre-checking these items can significantly improve your chances.
What should I check before my 1978 Porsche 928 MOT?
Before your 1978 Porsche 928 MOT, check these commonly-failed items: emissions levels exceed default limits, a spring or spring component fractured or seriously weakened, a wheel bearing with excessive play. Most are visual checks you can do at home – look for worn tyres, test all lights work, and check for obvious damage or leaks.
Is the 1978 Porsche 928 reliable for MOT?
With a 66.7% MOT pass rate, the 1978 Porsche 928 performs about average compared to typical vehicles. This is typical performance for vehicles in this age bracket.