AUDI S4 (2004)
Running costs, common problems, and reliability data based on 202 real MOT tests in 2024.
MOT Pass Rate
81%
Total Tests (2024)
202
Avg Mileage
99,762 mi
Est. Annual Cost
£2,247
Is the 2004 AUDI S4 reliable?
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 20 years old, 81% of AUDI S4s from 2004 passed their MOT first time in 2024. That's based on 202 tests across the UK. The average mileage at this age is 99,762 miles.
How does the 2004 AUDI S4 compare?
Mileage Analysis
The average 2004 AUDI S4 has 99,762 miles on the clock, 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.
Best year to buy a AUDI S4?
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%.
How much does a 2004 AUDI S4 cost to run?
Based on 7,400 miles/year (UK average), current fuel prices, and repair likelihood from MOT pass rate data. Insurance not included.
AUDI S4 by Year
Checking a specific AUDI S4?
Enter the reg plate to see its individual MOT history, mileage verification, and predicted costs.
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 2024, 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 20 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 £2,247 (£187/month), broken down as £1592 fuel, £250 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 20 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%.
Alternatives to the 2004 AUDI S4
If reliability is your priority, there are 2 similar cars with a higher MOT pass rate. Here are comparable petrol cars with similar engines:
- LAND ROVER RANGE ROVER (2006) 80% pass rate (-1%) from 8,231 tests
- LAND ROVER RANGE ROVER SPORT (2005) 82% pass rate (+1%) from 8,058 tests
- PORSCHE 911 (2006) 90% pass rate (+9%) from 6,184 tests
- VOLVO XC90 (2006) 73% pass rate (-8%) from 5,088 tests