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PORSCHE UNCLASSIFIED (2005)

Running costs, reliability data, and common problems from 46 real MOT tests.

Annual Cost

£2,607

£217/month

MOT Pass Rate

93%

Excellent

Road Tax

£760

Based on CC/year

Insurance

Grp 35-50

3596cc Petrol

Great Choice

93% pass rate, £2607/year to run. 11 points above average.

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Petrol3596cc21 years old46 tests90k miles avg

Annual Running Costs

Fuel (Petrol, 3596cc)

~30 mpg

£1,592
Road Tax

Based on 3596cc

£760
MOT Test
£55
Predicted Repairs

Low estimate due to excellent reliability

£200
Total per year£2,607
Per month£217/mo
Per week£50/wk

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

93% MOT pass rate(Excellent)
0%National avg: 82%100%

Excellent reliability. Very few MOT failures. That's 11 points above the national average of 82%.

At 21 years old, 93% of PORSCHE UNCLASSIFIEDs from 2005 passed their MOT first time in 2026. That's based on 46 tests across the UK. The average mileage at this age is 90,349 miles.

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How Does It Compare?

Rank among 2005 cars28th of 526(top 5%)
Rank among PORSCHE models144th of 276(top 52%)
vs national average+11%(82% avg)
vs 2005 cars average+21%(72% avg)
vs PORSCHE average+1%(92% avg)

Mileage Analysis

90,349

Average miles

vs

155,400

Expected for age

The average 2005 PORSCHE UNCLASSIFIED has 90,349 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.

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PORSCHE UNCLASSIFIED by Year

YearPass RateTestsAvg Mileage
2016100%3238,932 mi
201598%4643,596 mi
200593%4690,349 mi
199992%6181,375 mi

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About the 2005 PORSCHE UNCLASSIFIED

The 2005 PORSCHE UNCLASSIFIED is a luxury with a 3596cc petrol engine. 46 of these vehicles were MOT tested in 2026, making it a rare model on UK roads. It ranks in the top 5% of all 2005 cars for reliability.

With an average of 90,349 miles at 21 years old, PORSCHE UNCLASSIFIED owners tend to use this car less than the typical driver.

2005 PORSCHE UNCLASSIFIED Fuel Costs

The 3596cc 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 2005 PORSCHE UNCLASSIFIED?

Total estimated annual running cost is £2,607 217/month), broken down as £1592 fuel, £760 road tax, £55 MOT, and £200 predicted repairs. The low repair estimate reflects the excellent 93% pass rate. These cars rarely fail their MOT, so unexpected bills are less likely.

Buying a Used 2005 PORSCHE UNCLASSIFIED

At 21 years old, the PORSCHE UNCLASSIFIED 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 46 tests in our data, these figures should be treated as indicative rather than definitive.

Common Issues to Watch For

Based on the 2005 PORSCHE UNCLASSIFIED's fuel type, age, and engine size, these are the most likely problem areas to check.

Timing Chain / Belt

Watch out

At 21 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 risk

Larger 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 out

At 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 out

Rubber suspension bushes harden and crack with age, causing knocking noises and vague handling. A full refresh costs £300-£800 depending on the car.

Clutch Wear

Medium risk

With an average of 90k miles, clutch replacement may be due (typical lifespan 60,000-100,000 miles). Budget £400-£800 for a new clutch kit.

Brake Discs and Pads

Medium risk

High-mileage cars often need brake disc replacement, not just pads. A full set of discs and pads costs £200-£500 per axle.

Service History

Low risk

Always 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 2005 PORSCHE UNCLASSIFIED stacks up against similar cars for annual running costs, insurance, and tax.

CarPass RateFuel/yrTax/yrInsuranceTotal/yr
PORSCHE UNCLASSIFIED(2005)93%£1592£760Grp 35-50£2607
LAND ROVER FREELANDER(2007)75%£1592£250Grp 35-50£2397-£210
MERCEDES E(2004)78%£1592£250Grp 35-50£2397-£210
PORSCHE BOXSTER(2005)86%£1592£250Grp 35-50£2247-£360
PORSCHE 911(2006)90%£1592£250Grp 35-50£2097-£510

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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