DVSA Statistics
1991 Porsche 911
MOT Pass Rate & Pre-MOT Checklist
Used 1991 Porsche 911s usually pass their MOT, but around 1 in 9 still fail, most often for the aim of a headlamp is not within limits laid down in the requirements, fluid leaking excessively and likely to harm the environment or to pose a safety risk to other road users and a suspension joint dust cover missing or no longer prevents the ingress of dirt etc. Based on 310 MOT tests from DVSA data, this page shows how this model performs and what to check before your test.
Pass Rate
Based on 310 DVSA anonymised MOT tests · About this data
Pass Rate
88.7%
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 310 recorded tests.
Pre-MOT Checklist for 1991 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
Listen for knocks or clunks when driving over bumps - bounce each corner
Suspension – Common fail on this model
- 3
Test brakes for effectiveness, pull, and unusual noises when driving
Brakes – Common fail on this model
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Frequently Asked Questions
Is a 1991 Porsche 911 likely to fail its MOT?
Based on DVSA statistics, the 1991 Porsche 911 has a 88.7% 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 1991 Porsche 911?
The most common MOT failure reasons for a 1991 Porsche 911 are: the aim of a headlamp is not within limits laid down in the requirements, fluid leaking excessively and likely to harm the environment or to pose a safety risk to other road users, a suspension joint dust cover missing or no longer prevents the ingress of dirt etc. Many of these can be checked and fixed before your test to improve your chances of passing.
How can I reduce the chance my 1991 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, fluid leaking excessively and likely to harm the environment or to pose a safety risk to other road users, a suspension joint dust cover missing or no longer prevents the ingress of dirt etc. Use our pre-MOT checklist above to identify potential issues before your test. Many common failures are easy DIY fixes.
How many 1991 Porsche 911s fail their MOT?
Around 11% of 1991 Porsche 911s fail their MOT test, meaning roughly 1 in 9 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 fluid leaking excessively and likely to harm the environment or to pose a safety risk to other road users. Pre-checking these items can significantly improve your chances.
What should I check before my 1991 Porsche 911 MOT?
Before your 1991 Porsche 911 MOT, check these commonly-failed items: the aim of a headlamp is not within limits laid down in the requirements, fluid leaking excessively and likely to harm the environment or to pose a safety risk to other road users, a suspension joint dust cover missing or no longer prevents the ingress of dirt etc. 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 1991 Porsche 911 reliable for MOT?
With a 88.7% MOT pass rate, the 1991 Porsche 911 performs above average compared to typical vehicles. This suggests good overall condition for a vehicle of this age.