Porsche 911 Carrera 4s (2021)
2021 Porsche 911 Carrera 4s
CarHunch analysed 162 real MOT records for the 2021 Porsche 911 Carrera 4s. This breakdown of actual test outcomes — pass rates, defect profiles, mileage data — isn't published anywhere else.
The 2021 Porsche 911 Carrera 4S passes its MOT at 81.3%, marginally above the UK average of 80%, which is a solid result for a three-year-old performance car. The dangerous defect rate sits at just 0.6%, well below any concern threshold, so structural and safety integrity issues are rare in this cohort.
At a median mileage of 11,715 miles, these cars are being driven sparingly for their age—typical of specialist sports cars owned by collectors or weekend enthusiasts—and that low usage is reflected in the minimal average of 0.08 failures per vehicle. The 0.4 advisories per car suggest routine wear rather than developing problems, so budget for scheduled maintenance but don't expect major surprises; have any prospective purchase inspected by a Porsche specialist before committing, as these are complex machines where small issues can become expensive ones.
What to check before buying a 2021 Porsche 911 Carrera 4s
Practical pre-purchase checks for this age and model.
- 📋 Check the full MOT history. Look for recurring advisories — slow-building issues like corrosion or brake wear patterns show up years before they become failures. Enter the reg below for a full AI analysis.
- 🔍 Inspect for corrosion in person. Brake pipes, sills, subframes, and chassis legs. Surface rust is normal at this age; structural rust is a serious problem that's expensive to fix and can fail an MOT.
- 🛞 Check tyres and brakes. The most common advisory items at this age. Budget for replacement if they're near the limit — factor this into your offer price.
- 📄 Run an HPI check. The MOT history won't show outstanding finance, insurance write-offs, or stolen status — an HPI check will.
Before you buy a Porsche 911 Carrera 4s
MOT history is one piece of the puzzle. These checks can reveal what CarHunch can't.
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Pass Rate by Fuel Type
| Fuel type | Vehicles | Pass rate | Avg failures |
|---|---|---|---|
| Petrol (99%) | 161 | 81.2% | 0.08 |
| Other (1%) | 1 | 100% | 0 |
Mileage Distribution
Most 2021 Porsche 911 Carrera 4s vehicles sit in the blue band. If the car you're looking at is outside it, it's either unusually low or high mileage for its age.
Half of all 2021 Porsche 911 Carrera 4s vehicles fall between 8,026 and 19,514 miles.
MOT History Averages
Found a specific Porsche 911 Carrera 4s?
Enter the reg to see its individual MOT history, AI Hunches, and how it compares to this cohort.