2023 Audi A4 2.0 TDI S Line
Price: £20,300. Fair price: £385 (1%) under the AskCar estimate of £20,685, our expected asking price for this car from its model, age, mileage and specification, drawing on 1,427 priced Audi A4 adverts on AskCar as of 4 November 2026.
AskCar lists 1,488 used Audi A4 from 972 UK dealerships, as of 4 November 2026.
Overview
- Make: Audi
- Model: A4
- Trim: S Line
- Version: 2.0 TDI S Line S tronic FWD Euro 6 4dr (160 bhp)
- Year: 2023
- Mileage: 35,261 miles
- Fuel: Diesel
- Body: Saloon, 4 doors, 5 seats
- Engine: 2.0 litres, 160 bhp
- Gearbox: Automatic (S tronic)
- Drive: Front-wheel drive
- Colour: Blue
- CO2: 137 g/km
- Emissions standard: Euro 6, ULEZ compliant
About this car
This 2023 Audi A4 S Line is advertised with 35,261 miles, approximately 6,900 above the typical mileage for its age. Its asking price of £20,300 is £385 below the AskCar estimate of £20,685. The AskCar estimate draws on 1,427 Audi A4 adverts across the UK, adjusting for age, mileage, trim, engine and other specifications. We have tracked this advert for 10 days. Its advertised mileage matches the government's MOT record. It is advertised by Car Planet Barnet in New Southgate. How to contact the dealer and its opening hours are on this AskCar page.
Stock data as of 4 November 2026.
Price
Fair price: £385 (1%) under the AskCar estimate of £20,685.
The AskCar estimate is our expected asking price for this car. It uses UK dealer asking prices, accounting for make, model, trim, version, age, mileage, fuel, gearbox, body type, driven wheels, engine size and power. It is an advertised price, not a confirmed sale price.
It draws on 1,427 priced Audi A4 adverts across different ages and specifications, as of 4 November 2026.
A 2023 Audi A4 with the 2.0 diesel engine is typically advertised at £20,800: the median of the 219 for sale on AskCar, as of 4 November 2026.
Time on sale
This 2023 Audi A4 has been on sale for at least 10 days.
Price history
AskCar first saw this advert on 25 October 2026 at £20,300. Its asking price has not changed.
Mileage and MOT
MOT, from the government's MOT records (DVSA, the Driver and Vehicle Standards Agency), as of 4 November 2026: valid until 9 October 2027.
It has had one MOT, on 8 October 2026, and passed.
There were no advisories at the latest test.
Mileage at that test: 34,819 miles, which matches the advertised 35,261 miles.
Advertised mileage is about 6,900 miles higher than the median mileage of a 2023 Audi A4 on AskCar.
Similar cars
18 other 2023 Audi A4 S Line 2.0 diesel automatic saloons are for sale at UK dealers, from £19,355 to £31,995, as of 4 November 2026.
The 3 closest to this car in mileage:
- 2023 Audi A4 S Line, 2.0 diesel saloon, white. Mileage: 35,626 miles. Price: £21,999, £1,699 more than this car. Dealer: Days Motorpark in Swansea. AskCar page: https://askcar.co.uk/car/audi-a4-2023-e86ece71c515
- 2023 Audi A4 S Line, 2.0 diesel saloon, grey. Mileage: 35,636 miles. Price: £19,723, £577 less than this car. Dealer: Carbase Bristol in Bristol. AskCar page: https://askcar.co.uk/car/audi-a4-2023-0d95dbfeb478
- 2023 Audi A4 S Line, 2.0 diesel saloon, blue. Mileage: 34,433 miles. Price: £20,698, £398 more than this car. Dealer: CarSupermarket.com Hessle in Hessle. AskCar page: https://askcar.co.uk/car/audi-a4-2023-2f75df8de89d
- The nearest: 2023 Audi A4 S Line, 2.0 diesel saloon, grey, 12 miles from this car. Mileage: 31,143 miles. Price: £20,700, £400 more than this car. Dealer: Car Planet Watford in Watford. AskCar page: https://askcar.co.uk/car/audi-a4-2023-7c47b978c1ff
Browse all Audi A4 cars for sale · 2023 Audi A4 price guide
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- Used Audi A4 S Line prices
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- Used diesel Audi A4 for sale
- Used Audi A4 for sale near Barnet
Photos
38 photos of this car are on its AskCar page.
As of 4 November 2026, AskCar lists 592,552 cars and vans from 12,964 UK dealerships, read daily from dealer websites: over 99% of UK dealer used car adverts. No dealer pays to be listed.