On sale 34 daysOn sale 34 d
13,200 €
Private seller, Kalajoki, Pohjois-Pohjanmaa
1 / 12 Image source: Karilainen, Nettiauto
The 2006 Audi S4 is an all-wheel-drive sedan, petrol-powered with a manual gearbox. It has an engine displacement of 4.2 litres and an output of 253 kW (344 hp).
The asking price is 13,990 €. That is in line with bilbil.fi's estimated market price of 14,100 €. The estimate is based on 19 comparable cars. The chance this car sells within the next 30 days is about 56%.
The asking price has been reduced by 9 € from the original 13,999 €. A dealer typically sells this model in about 13 days and a private seller in about 26 days.
The odometer reads 245,000 km, which works out at about 12,000 km per year. The car was inspected 9/2026, and the next inspection is due an estimated 9/2027.
- Sunroof or panoramic roof
- Premium audio
- Fuel-operated parking heater
- Parking sensors
- Leather upholstery
This car has been sold before within bilbil.fi's tracking: it sold on 14/09/2026 for 8,999 €, at 241,000 km. It is now listed for 4,991 € more than in that sale. It has covered about 4,000 km more since.
Running the car costs an estimated:
- Vehicle tax 313 € per year
- Insurance 840 € per year
- Financing instalment 159 € per month
Vehicle tax and insurance come to about 1,150 € per year.
The original tyre size is 235/40 R18.
The seller is Karilainen (Ähtäri).
The car has been for sale for 6 days since 24/09/2026.
Basic information
- Registration number
- RTK-755
- Mileage
- 245,000 km
Verify mileage authenticity - Engine
- 4.2 l, Petrol
- Model year
- 2006
- Gearbox
- Manual
- Drivetrain
- All-wheel drive
- Body type
- Sedan
- Vehicle type
- Passenger car
- Colour
- Blue
- Tyre size
- 235/40 R18
- Wheel size
- 18″
- In traffic use in Finland
- 168 cars
- Steering position
- Left-hand
- VIN number
- WAUZZZ8E17A086129
- bilbil.fi ID
- 52128
Technical details
- Power
- 253 kW / 344 hp
- Seats
- 5
- Doors
- 5
- Cylinders
- 8
- Turbocharger
- No
- Gross weight
- 2,255 kg
- Dimensions (L × W × H)
- 4,590 × 1,770 × 1,420 mm
- Last inspection
- 9/2026
- Last service
- 27/05/2026
- Gearbox
- Manual
Equipment
- Fuel-operated parking heater
- Leather upholstery
- Parking sensors
- Premium audio
- Sunroof or panoramic roof
Equipment rating
Asking price: 13,990 €
- Private seller · 4/7/–4/9/2026
- Karilainen Oy · 24/9/2026
| Date | Price | Change | Listing |
|---|---|---|---|
| 04/07/2026 | 13,999 € | – | Private seller |
| 11/07/2026 | 13,900 € | −99 € | Private seller |
| 17/07/2026 | 13,499 € | −401 € | Private seller |
| 30/07/2026 | 12,999 € | −500 € | Private seller |
| 23/08/2026 | 11,999 € | −1,000 € | Private seller |
| 02/09/2026 | 9,999 € | −2,000 € | Private seller |
| 04/09/2026 | 8,999 € | −1,000 € | Private seller |
| 24/09/2026 | 13,990 € | – | Karilainen Oy |
Next inspection due around 9/2027
About 12 months left. A car over 10 years old is inspected every year. According to the listing, the car was inspected in 9/2026.
Check with TraficomThe interval is derived from the model year, because the listing has no first registration date.
Failure rate among cars of the same age
Of 19-year-old petrol passenger cars, 41.9% failed their periodic inspection in 2025 (92,636 inspections, median mileage 234,000 km).
Sale periods
Private seller, Kuopio, Pohjois-Savo 71 days
Karilainen Oy, Ähtäri, Etelä-Pohjanmaa 6 days for sale
4/7/20262/8/20261/9/202630/9/2026
sale
Sales
| Sold | Price | Mileage | Time on market | Seller |
|---|---|---|---|---|
| 14/09/2026 | 8,999 € from 13,999 € (−5,000 €) | 241,000 km | 72 days | Private seller, Kuopio, Pohjois-Savo |
Listing changes
| Date | What | Change |
|---|---|---|
| 24/09/2026 | Seller changed | Private seller → Karilainen Oy |
| 24/09/2026 | Asking price Karilainen Oy | 8,999 € → 13,990 € |
| 24/09/2026 | Mileage Karilainen Oy | 241,000 km → 245,000 km |
| 04/09/2026 | Asking price Private seller | 9,999 € → 8,999 € |
| 02/09/2026 | Asking price Private seller | 11,999 € → 9,999 € |
| 23/08/2026 | Asking price Private seller | 12,999 € → 11,999 € |
| 30/07/2026 | Asking price Private seller | 13,499 € → 12,999 € |
| 17/07/2026 | Asking price Private seller | 13,900 € → 13,499 € |
| 11/07/2026 | Asking price Private seller | 13,999 € → 13,900 € |
See detailed history data from carVertical: the report covers the car's mileage records, possible damage, previous owners and registrations.
View history reportService provided by carVertical
carVerticalWhen buying from a dealer, it's worth asking for a finance quote directly from them. Before that, though, get a loan quote from Rahalaitos too: it gives you something to compare the dealer's offer against, and a way to negotiate better terms.
Viewing quotes is free and doesn't commit you to anything. Rahalaitos puts your application out to as many as 25 lenders at once.
€
500 € 70,000 €
10 years
1 year 10 years
Estimated monthly instalment approx. 159 €/mo
See offers Comparison provided by 
The APR under Finnish consumer protection law is 7.48%, calculated for a loan of €7,500 with a repayment period of 9 years, an account fee of €5, an opening fee of €35 and a nominal interest rate of 5.80%. The amount repayable would then be €10,215, i.e. €94/month. A credit card's APR may be 18.97%, calculated for a loan of €1,500 with a repayment period of one year and a nominal interest rate of 17.50%. The amount repayable would then be €1,646 in total, i.e. €146 per month. The final APR, loan term and monthly instalment are set out in the loan agreement. Lenders draw up the loan agreement based on an individual credit assessment. The nominal interest rate offered may vary between 4.19% and 20%, and annual loan costs between €0 and €150. The loan term offered varies between 1 and 20 years. Loan amounts offered range from €500 to €70,000.
Vehicle tax under the tax tables in force in 2026.
- Base tax 313 €/yr
- Driving power tax 0 €/yr
- Total vehicle tax 313 €/yr
Base tax is based on gross weight (approx. 2270 kg).
Estimated annual insurance cost (liability + comprehensive).
Driver's age 45 yrs
- Liability insurance310 €/yr
- Comprehensive530 €/yr
- Total insurance840 €/yr
≈ 70 €/mo
Request a quoteService provided by 
The final price depends on factors such as claims history and place of residence, and is set in the quote.
Remember to check tyre condition with the seller.
Audi S4 (2005–2008) · 4.2 (253kW)
Tyre sizes for this car
- 235/40 R18 Original
- 235/30 R20 Recommended
- 235/35 R19 Recommended
- 225/40 R18 Recommended
- 235/45 R17 Recommended
- 225/45 R17 Recommended
Wheel sizes for this car
17″
18″
19″
20″
Original wheel size: 18″
What do the sizes mean?
Renkaatvaihtoon.fi guarantees that the tyres fit this exact car (RTK-755).
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Frequently asked questions about this car
Which car has the registration RTK-755?
RTK-755 is a 2006 Audi S4 with 245,000 km on the odometer. It is for sale at 13,990 €.
How much does Audi S4 cost?
Audi S4 is for sale at 13,990 €.
Is this car well priced?
According to bilbil.fi's price estimate, the asking price is at market price (estimated market price 14,100 €).
How long has this car been for sale?
The car has been for sale for at least 6 days. The listing entered bilbil.fi's tracking on 24/09/2026.
Has the price been reduced?
Yes. The asking price is 9 € below the original listing price.
Has this car been on the market before?
Yes: this car has one earlier completed sale on record. It was last sold on 14/09/2026 for 8,999 €, and it has been driven about 4,000 km more since then.
What model year is the car?
The car is model year 2006.
How many kilometres has the car covered?
The car's mileage is 245,000 km.
When is the car due for its next inspection?
Based on the listing data, the next inspection is due around 9/2027. A car over 10 years old is inspected every year.
How common is a 2006 Audi in Finland?
On 30/06/2026 there were 4,447 Audi passenger cars first used in 2006 in traffic use in Finland. That is 4.3 % of all cars first used that year, making it the 7th most common brand of that year among 35 brands. The most common fuel type among them is petrol (69.8 %). The figure is a snapshot of the whole fleet, not the number of cars for sale.
What fuel type and gearbox does the car have?
The fuel type is petrol and the gearbox is manual.
What features does the car have?
Notable features include Sunroof or panoramic roof, Premium audio, Fuel-operated parking heater, Parking sensors, Leather upholstery. The full feature list is on this page.
How much is the car's vehicle tax?
Vehicle tax is 313 € per year. It consists of the base tax, determined by CO₂ emissions or gross weight, and the driving power tax, charged on fuels other than petrol.
What tyre size fits this car?
The car's original tyre size is 235/40 R18.
Where is Audi S4 located?
The car is located in Etelä-Pohjanmaa (Ähtäri, Etelä-Pohjanmaa).
When was the car last serviced?
According to the listing, the last service was 27/05/2026.
How much does the car cost to keep per year?
The estimate is 1,153 € per year: vehicle tax 313 €, insurance 840 €. Insurance and energy are estimates; vehicle tax is calculated from the car's own data.
Who is selling this car?
The seller is Karilainen (Ähtäri).
Where can I see this car's price history?
This page shows the changes to the car's asking price, its sale periods and the edits made to the listing.