How much does a 2004 AUDI S4 AVANT 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 AVANT?

The 2004 AUDI S4 AVANT has a 88% MOT pass rate based on 76 tests in 2026. This ranks 54 out of 491 cars from 2004.

Which year AUDI S4 AVANT is most reliable?

The 2011 AUDI S4 AVANT has the highest MOT pass rate at 100%. The least reliable year is 2006 at 70%.

AUDI S4 AVANT (2004)

Q: Is the 2004 AUDI S4 AVANT reliable?

Good reliability. Occasional issues but generally solid. 88% of AUDI S4 AVANTs from 2004 passed their MOT first time in 2026, based on 76 tests. That's 6 points above the national average of 82%.

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

The average mileage for a 2004 AUDI S4 AVANT is 117,351 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 76 real MOT tests.

Annual Cost

£2,757

£230/month

MOT Pass Rate

88%

Good

Road Tax

£760

Based on CC/year

Insurance

Grp 35-50

4172cc Petrol

Solid Option

88% pass rate, £2757/year to run. 6 points above average.

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Petrol4172cc22 years old76 tests117k miles avg

Annual Running Costs

Fuel (Petrol, 4172cc)

~30 mpg

£1,592

Road Tax

Based on 4172cc

£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

88% MOT pass rate(Good)

0%National avg: 82%100%

Good reliability. Occasional issues but generally solid. That's 6 points above the national average of 82%.

At 22 years old, 88% of AUDI S4 AVANTs from 2004 passed their MOT first time in 2026. That's based on 76 tests across the UK. The average mileage at this age is 117,351 miles.

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How Does It Compare?

Rank among 2004 cars54th of 491(top 11%)

Rank among AUDI models802th of 1,079(top 74%)

vs national average+6%(82% avg)

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

vs AUDI average-2%(90% avg)

Mileage Analysis

117,351

Average miles

162,800

Expected for age

The average 2004 AUDI S4 AVANT has 117,351 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 2011 model with a 100% MOT pass rate, while the 2006 model has the lowest at 70%. The 2004 sits between the two at 88%.

AUDI S4 AVANT by Year

Year	Pass Rate	Tests	Avg Mileage
2012	96%	50	96,854 mi
2011	100%	54	94,508 mi
2010	85%	88	101,537 mi
2009	89%	92	100,885 mi
2007	93%	30	122,020 mi
2006	70%	64	113,870 mi
2005	84%	32	136,700 mi
2004	88%	76	117,351 mi
2003	79%	42	130,012 mi

Similar Cars to Consider

LAND ROVER RANGE ROVER

2006 · 4197cc Petrol

£2,247/year

80%

-8%

LAND ROVER RANGE ROVER SPORT

2005 · 4394cc Petrol

£2,247/year

82%

-6%

PORSCHE 911

2006 · 3824cc Petrol

£2,097/year

90%

+2%

VOLVO XC90

2006 · 4414cc Petrol

£2,397/year

73%

-15%

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About the 2004 AUDI S4 AVANT

The 2004 AUDI S4 AVANT is a premium performance with a 4172cc petrol engine. 76 of these vehicles were MOT tested in 2026, making it a rare model on UK roads. It ranks in the top 11% of all 2004 cars for reliability.

With an average of 117,351 miles at 22 years old, AUDI S4 AVANT owners tend to use this car less than the typical driver.

2004 AUDI S4 AVANT Fuel Costs

The 4172cc 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 AVANT?

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 88% pass rate. Keeping on top of servicing will help avoid surprises.

AUDI S4 AVANT Reliability Trend

Newer AUDI S4 AVANTs show better MOT pass rates than older ones, with an average improvement of 11 percentage points.

Buying a Used 2004 AUDI S4 AVANT

At 22 years old, the AUDI S4 AVANT 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 2011 model has the highest pass rate at 100%. Note: with only 76 tests in our data, these figures should be treated as indicative rather than definitive.

Common Issues to Watch For

Based on the 2004 AUDI S4 AVANT'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

Watch out

With an average of 117k 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 AVANT stacks up against similar cars for annual running costs, insurance, and tax.

Car	Pass Rate	Fuel/yr	Tax/yr	Insurance	Total/yr
AUDI S4 AVANT(2004)	88%	£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.