Porsche 911 carrera 4s
Reliability, running costs, and MOT data across 3 years from 324 real MOT tests.
Avg Pass Rate
91%
Total Tests
324
Best Year
2021 (97%)
Years Covered
3
About the Porsche 911 carrera 4s
The Porsche 911 carrera 4s has been tested 324 times in 2026 MOT data across 3 model years (2004 to 2021), with an average pass rate of 91%. That's comfortably above the national average of 82%, making it a reliable choice. Available as petrol.
Best and Worst Years
The 2021 model is the most reliable with a 97% pass rate from 258 tests. The 2009 model has the lowest at 82%. The 15 point spread between years means reliability varies somewhat, but no year is dramatically different.
Mileage Across Years
The oldest model in our data (2004) averages 69,237 miles, while the newest (2021) averages 14,894 miles.
Estimated Running Costs
Based on 7,400 miles/year, current fuel prices, and MOT pass rate data. Insurance not included.
Full 2021 detailsHow reliable is the Porsche 911 carrera 4s?
Porsche 911 carrera 4s by Year
Click any year to see detailed running costs, reliability data, and comparisons with similar cars.
Porsche 911 carrera 4s Guides & Articles
Cars That Hold Their Value UK 2026 (Up to 71% After 3 Years)
10 min read
Running CostsCheapest Cars to Run in 2026: Real Data from 19.8 Million MOT Tests
9 min read
Reliability20 Most Reliable Used Cars UK 2026: Real MOT Pass Rate Rankings
10 min read
Buying GuideFord Fiesta Common Problems (2026): What to Check Before Buying
13 min read
ReliabilityFord Puma Problems: 7 Issues Owners Report (2026)
13 min read
Checking a specific Porsche 911 carrera 4s?
Enter the reg plate to see its individual MOT history, mileage verification, and predicted costs.