2021 Audi A3 2.0 TDI S Line

Overview

• Make: Audi
• Model: A3
• Trim: S Line
• Version: 2.0 TDI S Line S tronic FWD Euro 6 4dr
• Year: 2021
• Mileage: 71,923 miles
• Fuel: Diesel
• Body: Saloon, 4 doors, 5 seats
• Engine: 2.0 litres
• Gearbox: Automatic (S tronic)
• Drive: Front-wheel drive
• Colour: Grey
• CO2: 124 g/km
• Emissions standard: Euro 6, ULEZ compliant

About this car

This 2021 Audi A3 S Line has covered 71,923 miles, around 28,300 more miles than is typical for its age. Priced at £15,995, it is advertised £388 below the AskCar estimate of £16,383. To work out the AskCar estimate, we analyse UK dealer adverts for 6,542 Audi A3 cars across different ages and specifications. The dealer may accept less. This car has been on sale for at least 108 days, and its asking price is down £2,000. Its advertised mileage matches the government's MOT record. It is advertised by S & R Motors in Swindon. How to contact the dealer and its opening hours are on this AskCar page.

Stock data as of 2 November 2026.

How we estimate prices and check cars

Price

Fair price: £388 (2%) under the AskCar estimate of £16,383.

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 6,542 priced Audi A3 adverts across different ages and specifications, as of 2 November 2026.

A 2021 Audi A3 with the 2.0 diesel engine is typically advertised at £17,400: the median of the 45 for sale on AskCar, as of 2 November 2026.

Time on sale

The dealer may accept less. This 2021 Audi A3 has been on sale for at least 108 days, and its asking price has been cut by £2,000. About 6 in 10 of 2021 Audi A3 cars are gone from sale within a month of being advertised: 403 of the 709 first advertised between 7 July 2026 and 29 September 2026.

Price history

AskCar first saw this advert on 17 July 2026 at £17,995. Its asking price is now £15,995, £2,000 less. The latest price cut was seen on 28 October 2026.

Price changes recorded:

• 17 July 2026: £17,995
• 15 August 2026: £17,295
• 30 August 2026: £16,995
• 24 September 2026: £16,495
• 28 October 2026: £15,995

Mileage and MOT

MOT, from the government's MOT records (DVSA, the Driver and Vehicle Standards Agency), as of 2 November 2026: valid until 24 January 2027.

It has had 3 MOTs. The latest, on 16 January 2026, passed.

Advisories at the latest test: windscreen damaged but not adversely affecting driver's view.

Mileage at that test: 65,032 miles, which matches the advertised 71,923 miles.

Advertised mileage is about 28,300 miles higher than the median mileage of a 2021 Audi A3 on AskCar.

Similar cars

2 other 2021 Audi A3 S Line 2.0 diesel automatic saloons are for sale at UK dealers, from £16,950 to £18,950, as of 2 November 2026.

The 2 closest to this car in mileage:

• 2021 Audi A3 S Line, 2.0 diesel saloon, white. Mileage: 40,682 miles. Price: £18,950, £2,955 more than this car. Dealer: Group 1 Automotive Southend Audi in Thundersley and South Benfleet. AskCar page: https://askcar.co.uk/car/audi-a3-2021-9f7dbaa9cf1d
• 2021 Audi A3 S Line, 2.0 diesel saloon, black. Mileage: 36,250 miles. Price: £16,950, £955 more than this car. Dealer: Group 1 Automotive Watford Audi in Watford. AskCar page: https://askcar.co.uk/car/audi-a3-2021-c91e9540ac3c