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Reliability
Are Porsches reliable? Common problems, MOT data, and full history checks for used Porsche vehicles.
87.4% MOT pass rate based on 183,000 tests.
Common faults and reliability ranked across 6 Porsche models.
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- ✓Full MOT history and mileage
- ✓Safety recall check
- ✓Vehicle valuation
Are Porsche cars reliable?
Porsche vs other premium brands
Porsche vehicles pass their MOT at 87.4%, 15 points above the national average of 71.9% and the highest of any premium brand tracked here. Porsche is well clear of the second-tier premium cluster: Jaguar at 79.1%, BMW at 79.0%, Audi at 78.3%, Land Rover at 77.0%, and Mercedes at 76.7%.
Reliability is remarkably consistent across the Porsche range. The lowest-scoring model, the Boxster, still passes at 82.4%, better than most volume-brand cars in Great Britain. The Macan SUV leads at 90.6%.
Reliability data shows part of the picture. A vehicle history check reveals the rest, including outstanding finance, stolen markers, write-offs, and mileage discrepancies.
What is the Porsche MOT pass rate by age?
Pass rate at each vehicle age, from 3 to 20 years old. National average shown for comparison.
Porsche pass rates start extremely high and stay high. Newer Porsches (3 to 6 years old) pass at 92 to 94%, well above the national average of 82 to 88% for the same age range. The gap grows with age up to about 15 years old.
At age 12, Porsches pass at 88.4% vs the national average of 64.1%, a gap of over 24 points. Even at age 20, Porsches pass at 80.8% vs 56.9% nationally. This partly reflects the mechanical over-engineering of Porsche models, and partly the enthusiast-ownership pattern where cars are meticulously maintained.
What are the most common Porsche faults?
Top 10 MOT failure categories for Porsche, ranked by the share of failed tests they were found on. National percentage shown alongside.
Top 5 specific Porsche failure reasons
These are the specific MOT examiner findings most frequently recorded on Porsche vehicles, along with what they mean.
- Not working (found on 15.34% of failed Porsche tests)
A lamp, indicator, or electrical component that has completely stopped functioning. Usually a blown bulb or faulty sensor.
- Has a cut in excess of the requirements deep enough to reach the ply or cords (found on 8.34% of failed Porsche tests)
A deep cut or gash in a tyre's sidewall or tread that exposes the internal structure. Usually means the tyre needs replacing immediately.
- Tread depth below requirements of 1.6mm (found on 8.00% of failed Porsche tests)
One or more tyres worn below the legal minimum tread depth. The legal limit is 1.6mm across the central three-quarters of the tyre.
- Lambda reading after 2nd fast idle outside specified limits (found on 7.46% of failed Porsche tests)
- Has ply or cords exposed (found on 6.47% of failed Porsche tests)
A tyre so worn or damaged that the internal cords are visible. This is a serious safety issue and an immediate MOT failure.
Porsche's failure profile leans toward lamps and tyres rather than mechanical wear. Tyre faults are found on 28.1% of failed tests (vs 22.6% nationally), which reflects the ultra-low-profile performance tyres fitted across the range. These wear quickly and fail on tread depth. Visibility faults are found on 13.1% of failed tests, a little below the national 15.7%. Suspension and brake faults are found less often on Porsches than on cars nationally.
Which Porsche models are most reliable?
Top 15 Porsche models ranked by MOT test volume. Pass rate shown for each. Green bars beat the national average of 71.9%. Red bars sit below it.
| Model | Tests | Pass rate | Most common failure |
|---|---|---|---|
| Porsche 911 | 44,126 | 88.3% | Lamps, reflectors and electrical equipment |
| Porsche Macan | 32,893 | 90.6% | Tyres |
| Porsche Boxster | 30,643 | 82.4% | Lamps, reflectors and electrical equipment |
| Porsche Cayenne | 27,709 | 84.6% | Tyres |
| Porsche Cayman | 13,571 | 88.7% | Lamps, reflectors and electrical equipment |
| Porsche Panamera | 6,300 | 88.0% | Tyres |
Every high-volume Porsche model on UK roads passes at above 82%. The Macan SUV leads at 90.6%, followed by the Cayman (88.7%), 911 (88.3%), Panamera (88.0%), Cayenne (84.6%), and Boxster (82.4%). The narrow spread, just 8 points from top to bottom, is unusually tight and speaks to consistent engineering standards across the range.
How many miles do Porsche vehicles typically cover?
Average recorded mileage at each MOT test, by vehicle age. National average shown for comparison.
Porsche vehicles cover much lower mileage than the national average at every age. At 3 years old they average 25,000 miles vs 34,000 nationally. By age 10 the gap is 65,000 vs 83,000, and by age 20 it is 85,000 vs 109,000. Porsches cover roughly a sixth to a third fewer miles than average at every age.
This is consistent with an enthusiast-ownership profile: many Porsches are second cars, weekend cars, or garaged specials rather than daily drivers. Our Premium Vehicle Reports compare the recorded mileage at every MOT test to flag discrepancies. A drop in recorded mileage between two tests is a strong signal that the odometer may have been tampered with.
Are there any Porsche safety recalls?
Safety recalls are issued by Porsche when a manufacturing defect could affect the safety of the vehicle. The DVSA records every UK recall and links it to affected vehicle identification numbers (VINs). Recalls are free for the owner to have fixed at a franchised dealer.
Recall lists change over time as new issues are identified and old ones are resolved. For that reason we do not maintain a static list here. When you check a Porsche via Brumble, the report shows any outstanding manufacturer safety recalls that still need action on that specific vehicle.
How do you check a Porsche's full history?
Before you buy any used Porsche, a full history check protects you from problems that a physical inspection would miss. Here is what a Premium Vehicle Report from Brumble covers.
Has this Porsche been written off?
An insurance write-off means the car has been declared uneconomical to repair after an accident, fire, or flood. The report shows the category (Cat A, B, N, or S), the date, and the cause. Cat A and B are permanently unroadworthy. Cat N and S can legally return to the road but often carry hidden damage and are worth significantly less.
Is there outstanding finance on this Porsche?
If the previous owner has an active HP, PCP, or loan agreement secured against the car, the finance company legally owns it until the balance is paid off. Buying a car with outstanding finance means the finance company can repossess it, even after you have paid the seller in full. The report checks with Experian for any active finance agreements.
Has this Porsche been reported stolen?
The Police National Computer records stolen vehicles. The report checks the PNC for any active stolen marker. Buying a stolen vehicle means the police can seize it and return it to the rightful owner, with no compensation.
Has the mileage been tampered with?
Every MOT test records the current mileage. The report shows the full mileage history from every recorded test and flags any drops or unusually flat periods. A drop between tests is a strong signal the odometer has been clocked. A car worth £15,000 with 60,000 miles on the clock might be worth £10,000 if the true mileage is 120,000.
Has this Porsche been used as a taxi or private hire vehicle?
Ex-taxis and private hire vehicles have typically covered high mileage under harder use than a private car of the same age. Insurers may view them as higher risk, and resale value is significantly lower. The report checks whether the vehicle has ever been registered as a taxi or private hire vehicle.
What is this Porsche worth?
The report includes current trade, retail, and private-sale valuations based on the vehicle's make, model, trim, mileage, and condition. Use it to check whether the asking price is fair before you negotiate.
Check any Porsche's full history for £9.99. No subscription.
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What should you check before buying a used Porsche?
Four practical steps before you hand over any money.
- 1
Check the MOT history
Every UK vehicle has a free MOT test history showing every pass, fail, advisory, and recorded mileage. Use the Brumble MOT checker to see what previous inspections found.
- 2
Check the vehicle's full history
A Premium Vehicle Report covers outstanding finance, stolen markers, write-offs, mileage discrepancies, safety recalls, and valuation. £9.99, no subscription.
- 3
Compare insurance before you commit
Porsche insurance groups vary widely by model and trim. Get a car insurance quote before you buy to avoid nasty surprises after the sale.
- 4
Check the tax status
Confirm the car is currently taxed, or you may not be able to drive it away. The Brumble tax checker shows current tax status and when tax is next due.
Porsche Reliability FAQs
Source: Brumble analysis of DVSA anonymised MOT test data, 2025, Great Britain (published June 2026). First MOT test of the year for each class 4 vehicle, with 5,000+ tests per model. Published under Open Government Licence v3.0.