How much does a 2004 AUDI S4 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 2004 AUDI S4?

The 2004 AUDI S4 has a 81% MOT pass rate based on 202 tests in 2026. This ranks 114 out of 491 cars from 2004.

Which year AUDI S4 is most reliable?

The 2013 AUDI S4 has the highest MOT pass rate at 94%. The least reliable year is 2006 at 78%.

AUDI S4 (2004)

Q: Is the 2004 AUDI S4 reliable?

Good reliability. Occasional issues but generally solid. 81% of AUDI S4s from 2004 passed their MOT first time in 2026, based on 202 tests. That's 1 points below the national average of 82%.

Q: What is the average mileage for a 2004 AUDI S4?

The average mileage for a 2004 AUDI S4 is 99,762 miles, which is below the expected 162,800 miles for a 22-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 202 real MOT tests.

Annual Cost

£2,757

£230/month

MOT Pass Rate

81%

Good

Road Tax

£760

Based on CC/year

Insurance

Grp 35-50

4163cc Petrol

Solid Option

81% pass rate, £2757/year to run. Close to the national average.

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Petrol4163cc22 years old202 tests100k miles avg

Annual Running Costs

Fuel (Petrol, 4163cc)

~30 mpg

£1,592

Road Tax

Based on 4163cc

£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

81% 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 AUDI brand average of 90%.

At 22 years old, 81% of AUDI S4s from 2004 passed their MOT first time in 2026. That's based on 202 tests across the UK. The average mileage at this age is 99,762 miles.

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How Does It Compare?

Rank among 2004 cars114th of 491(top 23%)

Rank among AUDI models955th of 1,079(top 89%)

vs national average-1%(82% avg)

vs 2004 cars average+9%(72% avg)

vs AUDI average-9%(90% avg)

Mileage Analysis

99,762

Average miles

162,800

Expected for age

The average 2004 AUDI S4 has 99,762 miles on the clock, which is below the expected 162,800 miles for a 22-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 2013 model with a 94% MOT pass rate, while the 2006 model has the lowest at 78%. The 2004 sits between the two at 81%.

AUDI S4 by Year

Year	Pass Rate	Tests	Avg Mileage
2017	94%	69	57,456 mi
2015	92%	39	65,685 mi
2014	86%	170	83,424 mi
2013	94%	189	90,972 mi
2012	92%	78	82,804 mi
2011	87%	277	94,642 mi
2010	90%	277	101,140 mi
2009	91%	216	92,422 mi
2007	82%	126	83,877 mi
2006	78%	263	110,513 mi
2005	80%	169	99,307 mi
2004	81%	202	99,762 mi
2000	85%	59	152,811 mi
1999	85%	142	161,691 mi

Similar Cars to Consider

LAND ROVER RANGE ROVER

2006 · 4197cc Petrol

£2,247/year

80%

-1%

LAND ROVER RANGE ROVER SPORT

2005 · 4394cc Petrol

£2,247/year

82%

+1%

PORSCHE 911

2006 · 3824cc Petrol

£2,097/year

90%

+9%

VOLVO XC90

2006 · 4414cc Petrol

£2,397/year

73%

-8%

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About the 2004 AUDI S4

The 2004 AUDI S4 is a premium performance with a 4163cc petrol engine. 202 of these vehicles were MOT tested in 2026, making it a less common model in the UK market. It ranks in the top 23% of all 2004 cars for reliability.

With an average of 99,762 miles at 22 years old, AUDI S4 owners tend to use this car less than the typical driver.

2004 AUDI S4 Fuel Costs

The 4163cc 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 2004 AUDI S4?

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 81% pass rate. Keeping on top of servicing will help avoid surprises.

AUDI S4 Reliability Trend

Newer AUDI S4s show better MOT pass rates than older ones, with an average improvement of 9 percentage points.

Buying a Used 2004 AUDI S4

At 22 years old, the AUDI S4 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 2013 model has the highest pass rate at 94%.

Common Issues to Watch For

Based on the 2004 AUDI S4's fuel type, age, and engine size, these are the most likely problem areas to check.

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.

Clutch Wear

Medium risk

With an average of 100k 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 2004 AUDI S4 stacks up against similar cars for annual running costs, insurance, and tax.

Car	Pass Rate	Fuel/yr	Tax/yr	Insurance	Total/yr
AUDI S4(2004)	81%	£1592	£760	Grp 35-50	£2757
LAND ROVER RANGE ROVER(2006)	80%	£1592	£250	Grp 35-50	£2247-£510
LAND ROVER RANGE ROVER SPORT(2005)	82%	£1592	£250	Grp 35-50	£2247-£510
PORSCHE 911(2006)	90%	£1592	£250	Grp 35-50	£2097-£660
VOLVO XC90(2006)	73%	£1592	£250	Grp 35-50	£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.