How much does a 2005 PORSCHE BOXSTER cost to run?

Estimated annual running cost is £2,757 (£230/month), including £1592 fuel, £760 road tax, £55 MOT, and £350 predicted repairs.

What is the MOT pass rate for a 2005 PORSCHE BOXSTER?

The 2005 PORSCHE BOXSTER has a 86% MOT pass rate based on 6,992 tests in 2026. This ranks 72 out of 526 cars from 2005.

Which year PORSCHE BOXSTER is most reliable?

The 2020 PORSCHE BOXSTER has the highest MOT pass rate at 98%. The least reliable year is 1998 at 78%.

PORSCHE BOXSTER (2005)

Q: Is the 2005 PORSCHE BOXSTER reliable?

Good reliability. Occasional issues but generally solid. 86% of PORSCHE BOXSTERs from 2005 passed their MOT first time in 2026, based on 6,992 tests. That's 4 points above the national average of 82%.

Q: What is the average mileage for a 2005 PORSCHE BOXSTER?

The average mileage for a 2005 PORSCHE BOXSTER is 78,175 miles, 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.

Running costs, reliability data, and common problems from 6,992 real MOT tests.

Annual Cost

£2,757

£230/month

MOT Pass Rate

86%

Good

Road Tax

£760

Based on CC/year

Insurance

Grp 35-50

3197cc Petrol

Solid Option

86% pass rate, £2757/year to run. Close to the national average.

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Petrol3197cc21 years old6,992 tests78k miles avg

Annual Running Costs

Fuel (Petrol, 3197cc)

~30 mpg

£1,592

Road Tax

Based on 3197cc

£760

MOT Test

£55

Predicted Repairs

£350

Total per year£2,757

Per month£230/mo

Per week£53/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

86% MOT pass rate(Good)

0%National avg: 82%100%

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, 86% of PORSCHE BOXSTERs from 2005 passed their MOT first time in 2026. That's based on 6,992 tests across the UK. The average mileage at this age is 78,175 miles.

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How Does It Compare?

Rank among 2005 cars72th of 526(top 14%)

Rank among PORSCHE models229th of 276(top 83%)

vs national average+4%(82% avg)

vs 2005 cars average+14%(72% avg)

vs PORSCHE average-6%(92% avg)

Mileage Analysis

78,175

Average miles

155,400

Expected for age

The average 2005 PORSCHE BOXSTER has 78,175 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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Best Year to Buy?

The most reliable year is the 2020 model with a 98% MOT pass rate, while the 1998 model has the lowest at 78%. The 2005 sits between the two at 86%.

PORSCHE BOXSTER by Year

Year	Pass Rate	Tests	Avg Mileage
2021	98%	727	12,725 mi
2020	98%	1,370	17,722 mi
2019	97%	2,672	21,404 mi
2018	96%	3,007	26,673 mi
2017	96%	2,767	31,373 mi
2016	95%	3,210	32,910 mi
2015	97%	2,716	32,812 mi
2014	94%	2,726	42,302 mi
2013	94%	3,111	45,989 mi
2012	94%	2,582	49,604 mi
2011	92%	1,483	50,786 mi
2010	93%	1,750	54,631 mi
2009	94%	1,731	61,617 mi
2008	92%	2,287	64,082 mi
2007	89%	3,485	72,004 mi
2006	88%	4,150	78,168 mi
2005	86%	6,992	78,175 mi
2004	83%	4,066	80,783 mi
2003	82%	5,008	83,796 mi
2002	82%	4,350	87,053 mi
2001	83%	4,134	86,615 mi
2000	82%	3,688	89,426 mi
1999	81%	3,058	94,996 mi
1998	78%	2,493	94,009 mi
1997	83%	1,352	93,558 mi
1996	77%	43	110,547 mi

Similar Cars to Consider

LAND ROVER FREELANDER

2007 · 3192cc Petrol

£2,397/year

75%

-11%

SAAB 9-3

2007 · 2792cc Petrol

£2,397/year

76%

-10%

MERCEDES E

2004 · 3199cc Petrol

£2,397/year

78%

-8%

MERCEDES CLK

2007 · 2997cc Petrol

£2,397/year

76%

-10%

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About the 2005 PORSCHE BOXSTER

The 2005 PORSCHE BOXSTER is a luxury with a 3197cc petrol engine. 6,992 of these vehicles were MOT tested in 2026, making it a reasonably common sight on UK roads. It ranks in the top 14% of all 2005 cars for reliability.

With an average of 78,175 miles at 21 years old, PORSCHE BOXSTER owners tend to use this car less than the typical driver.

2005 PORSCHE BOXSTER Fuel Costs

The 3197cc 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 BOXSTER?

Total estimated annual running cost is £2,757 (£230/month), broken down as £1592 fuel, £760 road tax, £55 MOT, and £350 predicted repairs. Repair costs are moderate, reflecting the 86% pass rate. Keeping on top of servicing will help avoid surprises.

PORSCHE BOXSTER Reliability Trend

Newer PORSCHE BOXSTERs show better MOT pass rates than older ones, with an average improvement of 11 percentage points.

Buying a Used 2005 PORSCHE BOXSTER

At 21 years old, the PORSCHE BOXSTER 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 2020 model has the highest pass rate at 98%. With 6,992 MOT tests in our data, there's strong statistical confidence in these figures.

Common Issues to Watch For

Based on the 2005 PORSCHE BOXSTER'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.

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 BOXSTER stacks up against similar cars for annual running costs, insurance, and tax.

Car	Pass Rate	Fuel/yr	Tax/yr	Insurance	Total/yr
PORSCHE BOXSTER(2005)	86%	£1592	£760	Grp 35-50	£2757
LAND ROVER FREELANDER(2007)	75%	£1592	£250	Grp 35-50	£2397-£360
SAAB 9-3(2007)	76%	£1592	£250	Grp 30-42	£2397-£360
MERCEDES E(2004)	78%	£1592	£250	Grp 35-50	£2397-£360
MERCEDES CLK(2007)	76%	£1592	£250	Grp 30-42	£2397-£360

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.