PORSCHE TURBO (2003)
Running costs, reliability data, and common problems from 38 real MOT tests.
Annual Cost
£3,107
£259/month
MOT Pass Rate
68%
Below Avg
Road Tax
£760
Based on CC/year
Insurance
Grp 35-50
3600cc Petrol
Proceed With Caution
68% pass rate, £3107/year to run. 14 points below average.
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Annual Running Costs
~30 mpg
Based on 3600cc
Higher estimate due to low pass rate
Based on 7,400 miles/year (UK average), current fuel prices, and repair likelihood from MOT data. Insurance not included.
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Reliability Verdict
Below average reliability. Budget extra for maintenance and repairs. That's 14 points below the national average of 82%. It falls below the PORSCHE brand average of 92%.
At 23 years old, 68% of PORSCHE TURBOs from 2003 passed their MOT first time in 2026. That's based on 38 tests across the UK. The average mileage at this age is 40,567 miles.
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Mileage Analysis
40,567
Average miles
170,200
Expected for age
The average 2003 PORSCHE TURBO has 40,567 miles on the clock, which is significantly below the expected 170,200 miles for a 23-year-old car. Low-mileage examples may have spent time sitting unused, so check for issues like corroded brakes or perished rubber seals.
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About the 2003 PORSCHE TURBO
The 2003 PORSCHE TURBO is a luxury with a 3600cc petrol engine. 38 of these vehicles were MOT tested in 2026, making it a rare model on UK roads. It sits in the bottom 79% of 2003 cars for MOT pass rates.
With an average of 40,567 miles at 23 years old, PORSCHE TURBO owners tend to use this car less than the typical driver. Very low mileage could mean the car has been garaged or used only for short trips, which can cause its own issues like battery drain and moisture buildup.
2003 PORSCHE TURBO Fuel Costs
The 3600cc petrol engine is on the larger side, so fuel won't be this car's strong point. 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 TURBO?
Total estimated annual running cost is £3,107 (£259/month), broken down as £1592 fuel, £760 road tax, £55 MOT, and £700 predicted repairs. The higher repair estimate reflects the 68% MOT pass rate. Cars in this bracket tend to need work on suspension, brakes, and emissions components.
Buying a Used 2003 PORSCHE TURBO
At 23 years old, the PORSCHE TURBO 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. Note: with only 38 tests in our data, these figures should be treated as indicative rather than definitive.
Common Issues to Watch For
Based on the 2003 PORSCHE TURBO's fuel type, age, and engine size, these are the most likely problem areas to check.
Timing Chain / Belt
Watch outAt 23 years old, check whether the timing belt has been replaced (typically due every 5-7 years or 60,000-100,000 miles). A snapped belt can destroy the engine.
Oil Consumption
Medium riskLarger petrol engines can develop higher oil consumption as they age. Check the oil level and look for blue smoke from the exhaust.
Rust and Corrosion
Watch outAt 10+ years, check wheel arches, sills, subframe, and brake lines for rust. Structural corrosion is an MOT failure. Prevention is far cheaper than repair.
Suspension Bushings
Watch outRubber suspension bushes harden and crack with age, causing knocking noises and vague handling. A full refresh costs £300-£800 depending on the car.
Higher Than Average Failure Rate
Watch outWith a 68% MOT pass rate, this model fails more often than most. Budget for unexpected repairs and get a thorough pre-purchase inspection.
Service History
Low riskAlways request a full service history. Regular servicing is the single best indicator of how well a car has been maintained, regardless of mileage.
Running Costs Compared
How the 2003 PORSCHE TURBO stacks up against similar cars for annual running costs, insurance, and tax.
| Car | Pass Rate | Fuel/yr | Tax/yr | Insurance | Total/yr |
|---|---|---|---|---|---|
| PORSCHE TURBO(2003) | 68% | £1592 | £760 | Grp 35-50 | £3107 |
| MERCEDES E(2004) | 78% | £1592 | £250 | Grp 35-50 | £2397-£710 |
| PORSCHE BOXSTER(2005) | 86% | £1592 | £250 | Grp 35-50 | £2247-£860 |
| PORSCHE 911(2005) | 90% | £1592 | £250 | Grp 35-50 | £2097-£1010 |
| LAND ROVER RANGE ROVER(2003) | 77% | £1592 | £250 | Grp 35-50 | £2397-£710 |
Estimates based on 7,400 miles/year, current fuel prices, and MOT data. Insurance groups are indicative. Actual costs vary by driver, location, and usage.
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