PORSCHE 911 (2003)
Running costs, common problems, and reliability data based on 5,168 real MOT tests in 2024.
MOT Pass Rate
87%
Total Tests (2024)
5,168
Avg Mileage
82,296 mi
Est. Annual Cost
£2,247
Is the 2003 PORSCHE 911 reliable?
Good reliability. Occasional issues but generally solid. That's close to the national average of 82%. It falls below the PORSCHE brand average of 92%.
At 21 years old, 87% of PORSCHE 911s from 2003 passed their MOT first time in 2024. That's based on 5,168 tests across the UK. The average mileage at this age is 82,296 miles.
How does the 2003 PORSCHE 911 compare?
Mileage Analysis
The average 2003 PORSCHE 911 has 82,296 miles on the clock, which is below the expected 155,400 miles for a 21-year-old car. This suggests lighter use than average, which generally means less wear on major components.
Best year to buy a PORSCHE 911?
The most reliable year is the 2021 model with a 100% MOT pass rate, while the 1998 model has the lowest at 85%. The 2003 sits between the two at 87%.
How much does a 2003 PORSCHE 911 cost to run?
Based on 7,400 miles/year (UK average), current fuel prices, and repair likelihood from MOT pass rate data. Insurance not included.
PORSCHE 911 by Year
| Year | Pass Rate | Tests | Avg Mileage |
|---|---|---|---|
| 2021 | 100% | 72 | 11,708 mi |
| 2020 | 97% | 2,366 | 17,049 mi |
| 2019 | 97% | 7,188 | 20,907 mi |
| 2018 | 96% | 7,623 | 18,989 mi |
| 2017 | 97% | 6,200 | 26,067 mi |
| 2016 | 97% | 5,524 | 28,111 mi |
| 2015 | 97% | 4,950 | 32,698 mi |
| 2014 | 96% | 4,806 | 32,843 mi |
| 2013 | 96% | 3,535 | 43,937 mi |
| 2012 | 95% | 4,253 | 50,959 mi |
| 2011 | 95% | 2,580 | 43,837 mi |
| 2010 | 94% | 3,656 | 49,709 mi |
| 2009 | 92% | 3,055 | 59,885 mi |
| 2008 | 92% | 4,216 | 58,132 mi |
| 2007 | 90% | 5,366 | 62,566 mi |
| 2006 | 90% | 6,184 | 70,206 mi |
| 2005 | 90% | 5,986 | 73,824 mi |
| 2004 | 88% | 5,191 | 74,425 mi |
| 2003 | 87% | 5,168 | 82,296 mi |
| 2002 | 86% | 4,972 | 84,310 mi |
| 2001 | 88% | 2,885 | 87,628 mi |
| 2000 | 86% | 2,099 | 90,453 mi |
| 1999 | 87% | 3,668 | 94,086 mi |
| 1998 | 85% | 3,337 | 99,008 mi |
| 1997 | 90% | 2,103 | 76,331 mi |
| 1996 | 91% | 2,651 | 80,487 mi |
| 1995 | 89% | 1,831 | 80,965 mi |
| 1994 | 91% | 1,473 | 95,559 mi |
| 1993 | 91% | 698 | 89,736 mi |
| 1992 | 94% | 611 | 81,375 mi |
| 1991 | 91% | 929 | 81,480 mi |
| 1990 | 91% | 1,888 | 94,950 mi |
Checking a specific PORSCHE 911?
Enter the reg plate to see its individual MOT history, mileage verification, and predicted costs.
About the 2003 PORSCHE 911
The 2003 PORSCHE 911 is a luxury with a 2198cc petrol engine. 5,168 of these vehicles were MOT tested in 2024, making it a reasonably common sight on UK roads. It ranks in the top 9% of all 2003 cars for reliability.
With an average of 82,296 miles at 21 years old, PORSCHE 911 owners tend to use this car less than the typical driver.
2003 PORSCHE 911 Fuel Costs
The 2198cc petrol engine offers a reasonable balance between performance and economy. Expect around 30 mpg in mixed driving, which works out to roughly £1,592 per year at current petrol prices of 142p per litre (based on 7,400 miles per year).
What does it cost to own a 2003 PORSCHE 911?
Total estimated annual running cost is £2,247 (£187/month), broken down as £1592 fuel, £250 road tax, £55 MOT, and £350 predicted repairs. Repair costs are moderate, reflecting the 87% pass rate. Keeping on top of servicing will help avoid surprises.
PORSCHE 911 Reliability Trend
Newer PORSCHE 911s show better MOT pass rates than older ones, with an average improvement of 6 percentage points.
Buying a Used 2003 PORSCHE 911
At 21 years old, the PORSCHE 911 is firmly in budget territory. Purchase prices are low, but check for rust, worn suspension bushes, and electrical gremlins. A full service history is especially valuable at this age. If you're flexible on year, the 2021 model has the highest pass rate at 100%. With 5,168 MOT tests in our data, there's strong statistical confidence in these figures.
Alternatives to the 2003 PORSCHE 911
The PORSCHE 911 is actually the most reliable option among similar petrol luxurys from this era. Here are comparable petrol cars with similar engines:
- RENAULT CLIO (2005) 67% pass rate (-20%) from 18,423 tests
- MERCEDES C (2005) 73% pass rate (-14%) from 17,978 tests
- HONDA CR-V (2005) 70% pass rate (-17%) from 16,222 tests
- AUDI A4 (2005) 75% pass rate (-12%) from 15,245 tests