Porsche 911 (2004)

Estimated running costs and MOT pass rates from 5,191 MOT tests in 2024.

Annual Cost

£3,153

£263/month

MOT Pass Rate

88%

Good

Road Tax

£790

Estimated/year

Est. Insurance

Grp 35-50

3824cc Petrol

Solid Option

88% pass rate, £3,153/year to run. 6 points above average.

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Petrol3824cc22 years old5,191 tests74k miles avg

Annual Running Costs

Fuel (Petrol, 3824cc)

~30 mpg

£1,958

Road Tax

Estimated CO2 band

£790

MOT Test

£55

Predicted Repairs

£350

Total per year£3,153

Per month£263/mo

Per week£61/wk

Estimates based on 7,400 miles/year (UK average), petrol at 174.57p a litre (GOV.UK weekly average, week of 19 October 2026), GOV.UK road tax rates and repair likelihood from MOT data. Insurance not included.

Reliability Verdict

88% MOT pass rate(Good)

0%All-model avg: 82%100%

Good reliability. Occasional issues but generally solid. That's 6 points above the average of 82% across all models in our data. It falls below the Porsche brand average of 92%.

88% of MOT tests on Porsche 911s from 2004 ended in a pass in 2024, when they were about 20 years old. That's based on 5,191 tests across the UK, retests included. The average mileage recorded at those tests was 74,425 miles.

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How Does It Compare?

Rank among 2004 models46th of 470(top 10%)

Rank among Porsche models204th of 272(bottom half)

vs average of all models+6%(82% avg)

vs 2004 models average+16%(72% avg)

vs Porsche average-4%(92% avg)

Mileage Analysis

74,425

Average miles

148,000

Expected for age

The average 2004 Porsche 911 had 74,425 miles on the clock at its 2024 MOT, which is below the expected 148,000 miles for a 20-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?

Of the years with at least 100 tests, the 2019 model has the highest MOT pass rate at 97%, while the 1998 model has the lowest at 85%. The 2004 scores 88%. Newer cars usually pass more often simply because they are younger, so compare years of a similar age.

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

Similar Cars to Consider

Land Rover Range Rover

2006 · 4197cc Petrol

£3,153/year

80%

-8%

Jaguar XK

2006 · 4196cc Petrol

£3,153/year

85%

-3%

Porsche Boxster

2006 · 3387cc Petrol

£3,153/year

88%

same

Jaguar XJ

2004 · 3555cc Petrol

£3,303/year

78%

-10%

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About the 2004 Porsche 911

The 2004 Porsche 911 is a luxury car. Our records list a 3824cc petrol engine, though engines vary between versions. 5,191 MOT tests were recorded on this model in 2024, making it a reasonably common sight on UK roads. It ranks in the top 10% of all 2004 models for MOT pass rate.

With an average of 74,425 miles recorded at its 2024 MOT tests, Porsche 911 owners tend to use this car less than the typical driver.

2004 Porsche 911 Fuel Costs

The 3824cc 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 £1,958 per year with petrol at 174.57p per litre (GOV.UK weekly average, week of 19 October 2026; based on 7,400 miles per year).

What does it cost to own a 2004 Porsche 911?

Total estimated annual running cost is £3,153 (£263/month), broken down as £1,958 fuel, £790 road tax, £55 MOT, and £350 predicted repairs. Repair costs are moderate, reflecting the 88% pass rate. Keeping on top of servicing will help avoid surprises.

Porsche 911 Reliability Trend

Newer Porsche 911s pass their MOT more often than older ones, by 5 percentage points on average, which is mostly down to age and wear.

Buying a Used 2004 Porsche 911

At 22 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 2019 model has the highest pass rate at 97%. With 5,191 MOT tests in our data, there's strong statistical confidence in these figures.

Common Issues to Watch For

These are typical issues for cars of this age, fuel type and engine size, not faults recorded on this model's MOT tests. Use them as a checklist when you view one.

Timing Chain / Belt

Watch out

At 22 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 2004 Porsche 911 stacks up against similar cars for estimated annual running costs, insurance group, and tax.

Car	Pass Rate	Fuel/yr	Tax/yr	Est. Ins. Group	Total/yr
Porsche 911(2004)	88%	£1,958	£790	Grp 35-50	£3,153
Land Rover Range Rover(2006)	80%	£1,958	£790	Grp 35-50	£3,153same
Jaguar XK(2006)	85%	£1,958	£790	Grp 35-50	£3,153same
Porsche Boxster(2006)	88%	£1,958	£790	Grp 35-50	£3,153same
Jaguar XJ(2004)	78%	£1,958	£790	Grp 35-50	£3,303+£150

Estimates based on 7,400 miles/year, GOV.UK average pump prices for the week of 19 October 2026, GOV.UK road tax rates and MOT data. Insurance groups are our rough estimate from engine size, not official groups. Actual costs vary by driver, location, and usage.

Questions about the 2004 Porsche 911

Is the 2004 Porsche 911 reliable?

Good reliability. Occasional issues but generally solid. 88% of MOT tests on 2004 Porsche 911s ended in a pass, from 5,191 tests (DVSA MOT data for tests in 2024, retests included). That's 6 points above the average of 82% across all models in the same data.

How much does a 2004 Porsche 911 cost to run?

Our estimate is £3,153 a year (£263 a month): £1,958 fuel, £790 road tax, £55 MOT and £350 predicted repairs, based on 7,400 miles a year. Insurance is not included.

What is the MOT pass rate for a 2004 Porsche 911?

88% of 5,191 MOT tests on the 2004 Porsche 911 ended in a pass (DVSA MOT data for tests in 2024, retests included). That ranks it 46th of 470 models first registered in 2004 (top 10%).

Which year Porsche 911 has the best MOT pass rate?

Of the years with at least 100 tests, the 2019 Porsche 911 has the highest MOT pass rate at 97% and the 1998 the lowest at 85%. Newer cars usually pass more often simply because they are younger and have done fewer miles.

What is the average mileage for a 2004 Porsche 911?

The average mileage recorded at MOT tests on the 2004 Porsche 911 is 74,425 miles, which is below the expected 148,000 miles for a 20-year-old car. This suggests lighter use than average, which generally means less wear on major components.