DVSA Statistics
1984 Porsche 911
MOT Pass Rate & Pre-MOT Checklist
Used 1984 Porsche 911s usually pass their MOT, but around 1 in 7 still fail, most often for the aim of a headlamp is not within limits laid down in the requirements, tyre tread depth not in accordance with the requirements and significant brake effort recorded with no brake applied indicating a binding brake. Based on 253 MOT tests from DVSA data, this page shows how this model performs and what to check before your test.
Pass Rate
Based on 253 DVSA anonymised MOT tests · About this data
Pass Rate
86.6%
Higher than average
Top Failure Reasons
Common MOT failures for this model
Quick DIY Fix
Headlight bulbs are a common MOT fail. Easy DIY replacement.
Based on DVSA statistics from 253 recorded tests.
Pre-MOT Checklist for 1984 Porsche 911
Based on common failure points for this model, check these items before your MOT:
- 1
Test all headlights work and aim is correct - check for condensation inside
Lighting – Common fail on this model
- 2
Check tyre tread depth is at least 1.6mm across the central 3/4 of the tyre
Tyres – Common fail on this model
- 3
Test brakes for effectiveness, pull, and unusual noises when driving
Brakes – Common fail on this model
How Does This Compare to Other Years?
Previous Year
1983 Porsche 911
Based on 174 UK MOT tests
Next Year
1985 Porsche 911
Based on 290 UK MOT tests
The 1984 model has a lower pass rate than 1983, but performs better than 1985.
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 253 MOT tests from the 2023 DVSA dataset. Your 1984 Porsche 911 was 39 years old when this data was collected and is now 42 years old.
Sample Size
High confidence - 253 tests (statistically reliable)
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.
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Frequently Asked Questions
Is a 1984 Porsche 911 likely to fail its MOT?
Based on DVSA statistics, the 1984 Porsche 911 has a 86.6% MOT pass rate. This is above average, indicating good reliability for a vehicle of this age.
What are the most common MOT failures on a 1984 Porsche 911?
The most common MOT failure reasons for a 1984 Porsche 911 are: the aim of a headlamp is not within limits laid down in the requirements, tyre tread depth not in accordance with the requirements, significant brake effort recorded with no brake applied indicating a binding brake. Many of these can be checked and fixed before your test to improve your chances of passing.
How can I reduce the chance my 1984 Porsche 911 fails its MOT?
To improve your chances of passing, check the items that commonly fail on this model: the aim of a headlamp is not within limits laid down in the requirements, tyre tread depth not in accordance with the requirements, significant brake effort recorded with no brake applied indicating a binding brake. Use our pre-MOT checklist above to identify potential issues before your test. Many common failures are easy DIY fixes.
How many 1984 Porsche 911s fail their MOT?
Around 13% of 1984 Porsche 911s fail their MOT test, meaning roughly 1 in 8 don't pass first time. The most common reasons are the aim of a headlamp is not within limits laid down in the requirements and tyre tread depth not in accordance with the requirements. Pre-checking these items can significantly improve your chances.
What should I check before my 1984 Porsche 911 MOT?
Before your 1984 Porsche 911 MOT, check these commonly-failed items: the aim of a headlamp is not within limits laid down in the requirements, tyre tread depth not in accordance with the requirements, significant brake effort recorded with no brake applied indicating a binding brake. 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 1984 Porsche 911 reliable for MOT?
With a 86.6% MOT pass rate, the 1984 Porsche 911 performs above average compared to typical vehicles. This suggests good overall condition for a vehicle of this age.