Porsche 911 MOT Failure Rate

Q: What is the MOT failure rate for a Porsche 911?

The Porsche 911 has an overall MOT failure rate of 11.2%, based on 253,372 MOT tests in the DVSA database. This is below the UK average of 28%.

Q: What are the most common MOT failures on a Porsche 911?

The most common MOT failure areas for the Porsche 911 are: Lamps & Electrics (2.7% risk), Tyres (1.2% risk), Brakes (1.1% risk). These are based on weighted component failure rates across all age and mileage bands.

Q: Is the Porsche 911 reliable for MOT?

Yes, the Porsche 911 is more reliable than average for MOT, with a failure rate of 11.2% compared to the UK average of 28%.

Q: How does the Porsche 911 MOT failure rate change with age?

The Porsche 911 MOT failure rate increases with vehicle age. Newer models typically have lower failure rates, while vehicles over 10 years old see significantly higher rates, often above 35%. Regular maintenance becomes more important as your vehicle ages.

Q: How can I reduce the risk of my Porsche 911 failing its MOT?

Check all lights and bulbs, inspect tyre tread depth, test windscreen washers and wipers, listen for brake or suspension noises, and consider a pre-MOT check at a local garage. Use AutoSafe's free prediction tool for a personalised risk assessment.

11.2%

MOT failure rate from 253,372 tests

16.8pp below the UK average (28%)

Key Findings for the Porsche 911

Overall MOT failure rate: 11.2% — 16.8pp below the UK average (28%)
Highest-risk component: Lamps & Electrics (2.7% failure risk)
Most reliable age group: 3-5 years (4.5% failure rate)
Highest-risk age group: 15+ years (16.0% failure rate)
Based on 253,372 official DVSA MOT tests

Failure Rate by Vehicle Age

How the Porsche 911 MOT failure rate changes with age:

Age	Failure Rate	Tests	Worst Area
0-2 years	5.1%	6,840	Tyres
3-5 years	4.5%	33,754	Tyres
6-10 years	5.3%	46,340	Tyres
11-15 years	10.0%	43,129	Lamps & Electrics
15+ years	16.0%	123,309	Lamps & Electrics

Component Risk Breakdown

Which parts of the Porsche 911 are most likely to cause an MOT failure:

Lamps & Electrics 2.7%

Tyres 1.2%

Brakes 1.1%

Suspension 0.9%

Visibility 0.8%

Body & Chassis 0.8%

Steering 0.2%

Porsche 911 by Age Group

See detailed MOT failure data for each age group:

What Porsche 911 Owners Should Watch For

Based on the MOT test data for the Porsche 911, here are the key areas to pay attention to before your MOT:

Lamps & Electrics (2.7% failure risk) — Walk around the car and check every bulb — headlights, brake lights, indicators, fog lights, and number plate lights. This is one of the cheapest and easiest fixes.
Tyres (1.2% failure risk) — Ensure all tyres have at least 1.6mm tread depth across the central three-quarters. Check for sidewall damage, bulges, and uneven wear.
Brakes (1.1% failure risk) — Check brake pad thickness, disc condition, and handbrake operation. Listen for grinding or squealing when braking.

Many of these issues are inexpensive to fix when caught early. A pre-MOT inspection at a local garage typically costs £20–£40 and can save you the cost of a retest (£15–£30) plus the inconvenience of a failed MOT.

Frequently Asked Questions

What is the MOT failure rate for a Porsche 911?

The Porsche 911 has an overall MOT failure rate of 11.2%, based on 253,372 MOT tests recorded in the DVSA database. This is below the UK national average of approximately 28%.

What are the most common MOT failures on a Porsche 911?

The most common areas for MOT failure on a Porsche 911 are:

Lamps & Electrics — 2.7% failure risk
Tyres — 1.2% failure risk
Brakes — 1.1% failure risk

These component risks are weighted averages across all age and mileage bands in the dataset.

Is the Porsche 911 reliable for MOT?

Yes, the Porsche 911 performs better than average in MOT tests. Its 11.2% failure rate is well below the UK average of 28%, making it one of the more reliable options.

How does the Porsche 911 MOT failure rate change with age?

The failure rate increases significantly with vehicle age. Newer Porsche 911 models (0-2 years) have a relatively low 5.1% failure rate. This pattern is common across most vehicle models and reflects increased wear on mechanical components over time.

How can I reduce the risk of my Porsche 911 failing its MOT?

The most effective steps are: (1) Check all lights and bulbs before your test — lighting failures are the most common and cheapest to fix. (2) Inspect tyre tread depth and condition. (3) Test your windscreen washers and wipers. (4) Listen for unusual noises from brakes or suspension. (5) Consider a pre-MOT check at a local garage. You can also use our free prediction tool to get a personalised risk breakdown for your specific vehicle.

Where can I check the MOT history of a Porsche 911?

You can check any vehicle's full MOT history for free on the official DVSA service. This shows all previous test results, advisory items, and failure reasons. AutoSafe goes further by analysing this data with AI to predict your future MOT outcome.

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Other Porsche Models

Compare the Porsche 911 MOT failure rate against other Porsche models:

Similar Failure Rate Models

These models from other manufacturers have a similar MOT failure rate to the Porsche 911:

Related Guides

Data methodology: Failure rates are weighted averages across all mileage bands, calculated from official DVSA MOT test records. Only age/mileage combinations with 100+ tests are included. Component risks represent the probability of failure in each specific area. Data covers 142 million MOT tests across the UK.

Trust signals: Risk model: CatBoost v55 • Data source: DVSA Open Data (OGL v3) • Last updated: 2026-03-08 • Limitation: population averages; individual vehicle condition, service history and mileage may vary.

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