2021 Audi A3 1.5 TFSI S Line

Overview

• Make: Audi
• Model: A3
• Trim: S Line
• Version: 1.5 TFSI 35 S Line S tronic FWD Euro 6 (s/s) 4dr (148 bhp)
• Year: 2021
• Mileage: 57,000 miles
• Fuel: Petrol, mild hybrid
• Body: Saloon, 4 doors, 5 seats
• Engine: 1.5 litres, 148 bhp
• Gearbox: Automatic (S tronic)
• Drive: Front-wheel drive
• Colour: Blue
• CO2: 131 g/km
• Emissions standard: Euro 6, ULEZ compliant

About this car

With 57,000 miles on the clock, this 2021 Audi A3 S Line has done roughly 13,400 more miles than a typical 2021 Audi A3. Priced at £12,999, it is advertised £3,919 below the AskCar estimate of £16,918. 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 156 days, and its asking price has been cut by £1,000. According to the government's MOT record, its advertised mileage is consistent with the latest test. It is for sale at Field Way Motors in Gerrards Cross. 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

Good value: £3,919 (23%) under the AskCar estimate of £16,918.

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 1.5 petrol engine is typically advertised at £18,000: the median of the 191 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 156 days, and its asking price has been cut by £1,000. 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 30 May 2026 at £13,999. Its asking price is now £12,999, £1,000 less. The latest price cut was seen on 17 October 2026.

Price changes recorded:

• 31 May 2026: £13,999
• 28 August 2026: £13,499
• 17 October 2026: £12,999

Mileage and MOT

MOT, from the government's MOT records (DVSA, the Driver and Vehicle Standards Agency), as of 2 November 2026: valid until 1 April 2027.

It has had 3 MOTs. The latest, on 2 April 2026, passed.

There were no advisories at the latest test.

Mileage at that test: 55,825 miles, which matches the advertised 57,000 miles.

Advertised mileage is about 13,400 miles higher than the median mileage of a 2021 Audi A3 on AskCar.

Similar cars

31 other 2021 Audi A3 S Line 1.5 petrol automatic saloons are for sale at UK dealers, from £11,995 to £20,995, as of 2 November 2026.

The 3 closest to this car in mileage:

• 2021 Audi A3 S Line, 1.5 petrol saloon, grey. Mileage: 57,000 miles. Price: £19,995, £6,996 more than this car. Dealer: Prestigio Motor Company in Watford. AskCar page: https://askcar.co.uk/car/audi-a3-2021-1c9d26e0fed8
• 2021 Audi A3 S Line, 1.5 petrol saloon, white. Mileage: 57,500 miles. Price: £16,290, £3,291 more than this car. Dealer: K Motors London in New Malden. AskCar page: https://askcar.co.uk/car/audi-a3-2021-b8cbd85642b8
• 2021 Audi A3 S Line, 1.5 petrol saloon, black. Mileage: 55,000 miles. Price: £17,304, £4,305 more than this car. Dealer: Shepshed Ford in Shepshed. AskCar page: https://askcar.co.uk/car/audi-a3-2021-eae480dfac43

• The nearest: 2021 Audi A3 S Line, 1.5 petrol saloon, black, 7 miles from this car. Mileage: 39,000 miles. Price: £20,995, £7,996 more than this car. Dealer: Prestigio Motor Company in Watford. AskCar page: https://askcar.co.uk/car/audi-a3-2021-1a321b81a2e4