Used buying checklist
Porsche 911 reliability, common problems and used buying checks
A used Porsche 911 looks better than average for reliability in UK MOT data: 9.5% of 52,087 tests failed, compared with 18.7% across all indexed models. A good example should have a clean MOT history for corrosion and structure, emissions, engine, and exhaust, and suspension and steering.
It can be, if the exact car has a clean history for corrosion and structure, emissions, engine, and exhaust, and suspension and steering.
Start with corrosion and structure, emissions, engine, and exhaust, and suspension and steering, then compare the car's mileage and recall record below.
Sources used: DVSA MOT tests (Apr 2026); vehicle recalls (Apr 2026); MOT fault wording (May 2025). MOT data does not capture every reliability issue, especially intermittent engine, gearbox or infotainment faults that do not appear during the test.
- 9.5% MOT failure rate
- Median tested mileage 56,625 miles
- 4,950 failed MOT tests analysed
Corrosion and structure is the clearest area to check
Corrosion and structure is the clearest named problem area in this model's MOT history (16.5 MOT notes per 100 tests). Example MOT phrases from this area include excessively corroded, corroded so that its cross sectional area is reduced and seriously weakened, and attachment bracket/mounting corroded and seriously weakened.
Example MOT phrases to search in the car's history:
- excessively corroded
- corroded so that its cross sectional area is reduced and seriously weakened
- attachment bracket/mounting corroded and seriously weakened
- corroded and seriously weakened
- leaking excessively from engine
- Lambda reading after 2nd fast idle outside specified limits
- emissions carbon monoxide content excessive
- has a major leak of exhaust gases
- ball joint excessively worn
- ball joint has excessive play
Focus on corrosion and structure, emissions, engine, and exhaust, and suspension and steering
The model's recorded failure rate is 9.5%, -9.2 percentage points compared with the average across all models. Use the seller questions below to check whether repeat MOT notes have actually been repaired.
- MOT tests analysed52,087 tests
- Median tested mileage56,625 miles
- Failed MOT tests4,950
Should you buy a used Porsche 911?
90.5% of the MOT tests we analysed for this model passed. The model's recorded failure rate is 9.5%, -9.2 percentage points compared with the average across all models. This is a buying brief for the exact car in front of you: clean repeat history matters more than badge reputation.
- Repeat unresolved MOT notes for corrosion and structure, emissions, engine, and exhaust, and suspension and steering
- corrosion and structure appearing across more than one MOT
- Any dangerous MOT failure on the exact car, especially if the same area appears again later
- No paperwork showing applicable recall work has been completed
- A seller who cannot explain MOT wording such as "excessively corroded"
It can be, if the exact car has a clean history for corrosion and structure, emissions, engine, and exhaust, and suspension and steering.
Start with corrosion and structure, emissions, engine, and exhaust, and suspension and steering, then compare the car's mileage and recall record below.
Corrosion and structure is the clearest named problem area in the MOT history (16.5 MOT notes per 100 tests). These counts are issue notes, not failure rates, because a single MOT can list several faults.
Past 100k miles on the Porsche 911, MOT records most often point to corrosion and structure, emissions, engine, and exhaust, and suspension and steering.
The MOT failure rate rises from 4.2% at 0-3 years to 12.2% at 15+ years. Compare the car with the nearest age range before treating a fault as normal wear or a warning sign. The average MOT failure rate across all models in the same dataset is 18.7%.
Start with corrosion and structure, emissions, engine, and exhaust, suspension and steering, and lights and electrical. The checklist on this page explains why each area is being recommended, what to inspect, and what to ask the seller.
6 relevant recall notices appear for this model. Treat them as safety checks to verify for the exact car, not as normal MOT wear.
What should I check first?
Start with corrosion and structure, emissions, engine, and exhaust, suspension and steering, and lights and electrical. The checklist on this page explains why each area is being recommended, what to inspect, and what to ask the seller. Each item shows whether it comes from MOT results, recall notices, or a standard used-car check.
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Corrosion and structure Seen in MOT results
Corrosion and structure is one of the most common MOT problem areas for this model (16.5 MOT notes per 100 tests).
What to check: Inspect sills, subframes, mounting points, arches, and underside corrosion advisories.
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Emissions, engine, and exhaust Seen in MOT results
Emissions, engine, and exhaust is one of the most common MOT problem areas for this model (7.1 MOT notes per 100 tests).
What to check: Check warning lights, smoke, exhaust leaks, recent emissions failures, and service history.
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Suspension and steering Seen in MOT results
Suspension and steering is one of the most common MOT problem areas for this model (6.2 MOT notes per 100 tests).
What to check: Listen for knocks, check uneven tyre wear, and inspect steering play.
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Lights and electrical Seen in MOT results
Lights and electrical is one of the most common MOT problem areas for this model (4.5 MOT notes per 100 tests).
What to check: Check every lamp, warning light, horn, battery condition, and dashboard messages.
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Windscreen, wipers, and mirrors Seen in MOT results
Windscreen, wipers, and mirrors is one of the most common MOT problem areas for this model (3.1 MOT notes per 100 tests).
What to check: Check windscreen damage, wiper operation, washers, mirrors, and demisting.
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Tyres and wheels Seen in MOT results
Tyres and wheels is one of the most common MOT problem areas for this model (1.5 MOT notes per 100 tests).
What to check: Check tyre age, tread depth, sidewall damage, wheel condition, and alignment wear.
What changes with mileage?
Past 100k miles on the Porsche 911, MOT records most often point to corrosion and structure, emissions, engine, and exhaust, and suspension and steering.
Common MOT problem areas
Common faults: what usually fails on this model?
Corrosion and structure is the clearest named problem area in the MOT history (16.5 MOT notes per 100 tests). These counts are issue notes, not failure rates, because a single MOT can list several faults.
Recall-related areas to verify
Official recall areas
Manufacturer recall notices for the Porsche 911 mainly involve 6 areas: suspension and steering, seatbelts and safety systems, emissions, engine, and exhaust, and tyres and wheels. Treat each as something to verify on the specific car you are viewing; the recall table below shows the official notice text.
Mileage and age checks
Mileage changes: what starts showing up after high mileage?
Past 100k miles on the Porsche 911, MOT records most often point to corrosion and structure, emissions, engine, and exhaust, and suspension and steering. On lower-mileage cars, the most common named areas are corrosion and structure, emissions, engine, and exhaust, and windscreen, wipers, and mirrors.
| Mileage range | Tests | Vehicles | Failure rate (vs all models) | Median mileage |
|---|---|---|---|---|
| 0-50k | 22,709 | 20,812 | 5.0%-5.8 percentage points vs all models | 26,077 miles |
| 50-100k | 21,133 | 18,227 | 12.0%-8.7 percentage points vs all models | 72,213 miles |
| 100-150k | 6,880 | 5,844 | 16.0%-10.2 percentage points vs all models | 115,199 miles |
| 150-200k | 847 | 701 | 17.1%-10.2 percentage points vs all models | 162,924 miles |
| 200k+ | 118 | 96 | 20.3%-6.2 percentage points vs all models | 216,481 miles |
Problem areas by mileage
Past 100k miles on the Porsche 911, MOT records most often point to corrosion and structure, emissions, engine, and exhaust, and suspension and steering.
| Mileage range | Car areas most often recorded | Specific MOT defect examples |
|---|---|---|
| 0-50k |
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| 50-100k |
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| 100-150k |
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| 150-200k |
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| 200k+ |
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Fair comparisons: is this problem normal for its age?
The MOT failure rate rises from 4.2% at 0-3 years to 12.2% at 15+ years. Compare the car with the nearest age range before treating a fault as normal wear or a warning sign. The average MOT failure rate across all models in the same dataset is 18.7%. The highest failure rate by age is 12.2% for 15+ years cars, based on 31,313 tests.
| Age range | Tests | Vehicles | Failure rate (vs all models) | Median age |
|---|---|---|---|---|
| 0-3 years 2023–2026 reg. |
449 | 432 | 4.2%-4.2 percentage points vs all models | 3.0 years |
| 3-6 years 2020–2023 reg. |
6,030 | 5,406 | 4.5%-6.1 percentage points vs all models | 4.9 years |
| 6-10 years 2016–2020 reg. |
6,793 | 6,228 | 4.5%-12.2 percentage points vs all models | 8.0 years |
| 10-15 years 2011–2016 reg. |
7,502 | 6,820 | 7.2%-16.4 percentage points vs all models | 12.7 years |
| 15+ years pre-2011 reg. |
31,313 | 27,040 | 12.2%-13.7 percentage points vs all models | 20.5 years |
Recall records and data freshness
Recall context: are there safety notices to know about?
6 relevant recall notices appear for this model. Treat them as safety checks to verify for the exact car, not as normal MOT wear.
| 2025-02-26 | ASA0 - Check rear seat belt buckles and rework if necessary Due to a process error in the production an aluminium butyl may have been positioned incorrectly and the screw connection of the rear left and right belt buckle was potentially not executed according to the specifications. If this is the case the correct fastening of the belt buckle cannot be guaranteed. The loosening of the rear belt buckles in the event of an accident or emergency braking cannot be ruled out. This could increase the associated risk of injury. The positioning of the aluminium butyl mat on the left and right of the affected vehicles must be checked and depending on the test result the screw connection must be reworked. |
|---|---|
| 2024-10-28 | ARC4 Stop Use & Safety Recall - Wheel attachment with central locking On affected vehicles the wheel attachments using the central lock may not meet the required specifications. This can lead to damage / breakage and the possibility of wheel detachment. Check the correct functioning of the central lock wheel fastening system and replace if necessary. |
| 2024-03-13 | ARA3 - Check front and rear windows and replace if necessary On the affected vehicles it is possible that the front and rear window panes were not manufactured in accordance with specifications and their bonding to the body is therefore insufficient To prevent this from happening the front and rear windows on the affected vehicles must be checked and if necessary replaced |
| 2023-11-08 | On affected vehicles the side airbag installed in bucket seats may be activated unnecessarily. On affected vehicles the side airbag installed in bucket seats may be activated unnecessarily. Recode the airbag control unit |
| 2021-09-22 | THE SCREW CONNECTION OF THE PRESSURE INPUT ROD OF THE BRAKE BOOSTER WAS NOT CARRIED OUT ACCORDING TO REGULATIONS The screw connection of the pressure input rod of the brake booster may not have been tightened according to regulations. The brake booster must be replaced or reworked depending on the vehicle type.� |
| 2019-12-13 | THERE IS A POSSIBILITY THAT THE HAZARD WARNING LIGHTS WILL NOT BE ACTIVATED AFTER PRESSING THE CENTRE CONSOLE BUTTON There is a possibility that the hazard warning lights will not be activated after pressing the button in the center console. Re-program the operator control unit in front center console. |
Related searches
Common ways people look up the Porsche 911. Each link runs the search and lands on the relevant section of this report.
Related reliability guides
See where this model sits against other Porsche reports by MOT failure rate and common problem area.
Compare high-confidence model reports across all makes.
Use the fleet mileage baseline before checking this model's own mileage table.
Compare this model's age pattern with the wider MOT baseline.
Sources used: DVSA MOT tests (Apr 2026); vehicle recalls (Apr 2026); MOT fault wording (May 2025). These are patterns from many MOT tests and recall notices. They help you decide what to inspect and what to ask; they do not certify the condition of one specific car.