Is the 2006 AUDI S4 reliable?

Average reliability. Expect some repairs as it ages. 78% of AUDI S4s from 2006 passed their MOT first time in 2026, based on 263 tests. That's 4 points below the national average of 82%.

How much does a 2006 AUDI S4 cost to run?

Estimated annual running cost is £2,907 (£242/month), including £1592 fuel, £760 road tax, £55 MOT, and £500 predicted repairs.

What is the MOT pass rate for a 2006 AUDI S4?

The 2006 AUDI S4 has a 78% MOT pass rate based on 263 tests in 2026. This ranks 203 out of 575 cars from 2006.

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 (2006)

Q: What is the average mileage for a 2006 AUDI S4?

The average mileage for a 2006 AUDI S4 is 110,513 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.

Running costs, reliability data, and common problems from 263 real MOT tests.

Annual Cost

£2,907

£242/month

MOT Pass Rate

78%

Average

Road Tax

£760

Based on CC/year

Insurance

Grp 35-50

4163cc Petrol

Check Carefully

78% pass rate, £2907/year to run. Close to the national average.

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Petrol4163cc20 years old263 tests111k miles avg

Annual Running Costs

Fuel (Petrol, 4163cc)

~30 mpg

£1,592

Road Tax

Based on 4163cc

£760

MOT Test

£55

Predicted Repairs

£500

Total per year£2,907

Per month£242/mo

Per week£56/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

78% MOT pass rate(Average)

0%National avg: 82%100%

Average reliability. Expect some repairs as it ages. That's close to the national average of 82%. It falls below the AUDI brand average of 90%.

At 20 years old, 78% of AUDI S4s from 2006 passed their MOT first time in 2026. That's based on 263 tests across the UK. The average mileage at this age is 110,513 miles.

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How Does It Compare?

Rank among 2006 cars203th of 575(top 35%)

Rank among AUDI models993th of 1,079(top 92%)

vs national average-4%(82% avg)

vs 2006 cars average+5%(73% avg)

vs AUDI average-12%(90% avg)

Mileage Analysis

110,513

Average miles

148,000

Expected for age

The average 2006 AUDI S4 has 110,513 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.

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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%. Consider a different year if reliability is a priority.

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

JAGUAR XF

2008 · 4196cc Petrol

£2,397/year

78%

same

LAND ROVER RANGE ROVER

2006 · 4197cc Petrol

£2,247/year

80%

+2%

LAND ROVER RANGE ROVER SPORT

2005 · 4394cc Petrol

£2,247/year

82%

+4%

PORSCHE 911

2006 · 3824cc Petrol

£2,097/year

90%

+12%

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About the 2006 AUDI S4

The 2006 AUDI S4 is a premium performance with a 4163cc petrol engine. 263 of these vehicles were MOT tested in 2026, making it a less common model in the UK market. Among all cars from 2006, the average MOT pass rate is 73%, and this model beats that benchmark.

With an average of 110,513 miles at 20 years old, AUDI S4 owners tend to use this car less than the typical driver.

2006 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 2006 AUDI S4?

Total estimated annual running cost is £2,907 (£242/month), broken down as £1592 fuel, £760 road tax, £55 MOT, and £500 predicted repairs. Repair costs are moderate, reflecting the 78% 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 2006 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.

Common Issues to Watch For

Based on the 2006 AUDI S4's fuel type, age, and engine size, these are the most likely problem areas to check.

Timing Chain / Belt

Watch out

At 20 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 111k 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 2006 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(2006)	78%	£1592	£760	Grp 35-50	£2907
JAGUAR XF(2008)	78%	£1592	£250	Grp 35-50	£2397-£510
LAND ROVER RANGE ROVER(2006)	80%	£1592	£250	Grp 35-50	£2247-£660
LAND ROVER RANGE ROVER SPORT(2005)	82%	£1592	£250	Grp 35-50	£2247-£660
PORSCHE 911(2006)	90%	£1592	£250	Grp 35-50	£2097-£810

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.