2018 Porsche 911 4.0L Petrol · 11 XAT
2018 Porsche 911 (4.0L, petrol). First registered 17 May 2018. Recorded mileage 27,268 miles. MOT valid until 16 Jul 2027. Taxed until 01 Aug 2027.
- Make & Model
- PORSCHE 911
- Year / Origin
- 2018
- Safety Recall
- Unknown
- MOT Status
- Valid until 16 Jul 2027
- Road Tax
- Taxed (01 Aug 2027)
- Recorded Mileage
- 27,268 mi
- ULEZ Compliance
- ULEZ Compliant (Euro 4+)
- Fuel & Engine
- Petrol · 4.0L
- Reliability Guide
- Common Faults
AI-generated interpretation of this vehicle’s MOT record — not an official statement and not a substitute for an independent inspection.
Thinking of buying this vehicle? Free MOT and tax checks do not cover legal ownership. If outstanding finance exists, finance companies have legal right to repossess without compensation.
11 XAT Key Findings
- 5 MOT tests recorded
- Latest MOT passed on 07/07/2026
- 27,268 miles recorded at latest MOT
- 1 historical MOT failure
- 2 defects noted at the latest MOT
- Recurring lighting items (3 mentions)
Derived directly from the recorded DVSA and DVLA data shown on this page.
11 XAT MOT History
Interpretation generated from the recorded test data above — not an official DVSA statement and not a substitute for an independent inspection.
5 MOT tests are recorded for this 2018 Porsche 911 (11 XAT) between August 2023 and July 2026.
The record contains 4 passes and 1 failure.
The most recent test on 07 July 2026 was a pass, although the earlier record includes 1 failure that buyers may want to investigate.
Across all tests, the most frequently flagged areas are: Lighting (3 issues), Tyres (2 issues). Repeated mentions in one area can indicate an ongoing pattern worth checking in person.
In total 4 advisory notices are recorded. Advisories flag items that passed but may need attention before the next test; they are not evidence of how well the vehicle has been serviced.
11 XAT Mileage History
- 30/08/202316,414 mi
- 18/07/202420,406 mi+3,992 mi
- 27/06/202524,324 mi+3,918 mi
- 07/07/202627,268 mi+2,944 mi
- 07/07/202627,268 mi
Average of roughly 3,805 miles per year across 5 recorded odometer readings.
Technical Specifications
Core Specifications
Identification & Status
Dimensions & Weights
Diagnostic & Valuation Intelligence
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Known faults for Porsche Porsche 911 (991)
Our database tracks 4 specific mechanical faults and recurring failure patterns identified across UK MOT testing stations for this generation.
MOT Roadworthiness: Good
This rating reflects historical MOT pass rates and recurring advisory wear patterns from official DVSA test logs. Note that roadworthiness does not verify outstanding finance, insurance write-offs, or stolen records.
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Digital Service History
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Buyer's Guide & Inspection Advisory
Expert automotive synthesis from historical MOT defect records and market benchmarks.
Our Verdict
A strong purchase candidate for those se
When inspecting this vehicle, pay close attention to the offside front wheel bearing, as this was a recorded failure in July 2026. Ensure that the repair has been documented and that the slight play noted in the MOT has been fully rectified. You should also verify that the headlamp aim has been correctly calibrated following the recent failure.
Given the high-performance nature of the 3996cc engine, request evidence of specialist service intervals rather than relying solely on the MOT history. While the MOT records are clean for several years, they do not confirm the mechanical upkeep required for a vehicle of this specification. Check for any signs of uneven tyre wear which could relate to the wheel bearing issue or suspension geometry.
Running a 4.0-litre Porsche 911 involves significant costs. Fuel economy will be relatively low compared to standard road cars, and the high-performance petrol engine will place it in a higher insurance group and tax band.
Maintenance costs for this model are typically higher than average, particularly for tyres and braking components. While the MOT history shows no major exhaust or brake pipe failures—which are common for this model aggregate—you should budget for premium parts and specialist labour. An estimated annual running cost would be roughly £3,500-£5,000 depending on mileage and driving style.
The most critical item to inspect is the offside front wheel bearing, which was flagged with 'slight play' during the July 2026 MOT failure. Listen for any humming or grinding noises from the front end during a test drive. You should also check the nearside rear tyre to ensure the nail reported in the 2026 MOT has been replaced with a high-quality tyre.
Additionally, check the headlight alignment to ensure the 'headlamp aim too high' issue from the recent failure has been resolved. Finally, despite the clean MOT record between 2023 and 2025, inspect the underside for any signs of fluid leaks or wear that might not have triggered an MOT advisory but are relevant to a high-performance vehicle.
This 2018 Porsche 911, finished in green, shows significantly lower-than-average usage for its age. With 27,268 miles recorded in its most recent July 2026 MOT, it has been driven much less than the model aggregate average of 2,160 miles per year. While the most recent test resulted in a failure due to wheel bearing play and headlamp aim, the previous three years of testing showed no defects recorded.
The Porsche 911 shows a high average MOT pass rate of 90.8% across 56,325 analysed vehicles, though common failure points include exhaust, headlamp, and brake pipes.
Reviewed by the IsItAGoodCar editorial team — Verified automotive analysis synthesized from official vehicle registries.
Data Sources
DVSA
Official MOT test logs & failure reasons
DVLA
Tax, registration & powertrain specs
Experian
Finance, stolen markers & total loss
AI Analysis
Historical fault & advisory patterns
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PORSCHE 911 Model Intelligence & Reliability
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Historical MOT pass rates and DVLA records for 2018 model year cars.
- Dynamic Engine Mount (PADM) FailureModerate
The electromagnetically controlled engine mounts fail internally, triggering a dashboard warning.
- Water Pump FailureModerate
The water pump bearing or impeller can fail, causing coolant loss and overheating. The 991.2 has an extended warranty from Porsche for this issue.
- Cracked Ignition Coil PacksModerate
Coil packs can crack and fail, causing misfires. Common across all 991 variants and relatively inexpensive to fix.
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