2021 Audi A3 1.5 TFSI S Line

Overview

• Make: Audi
• Model: A3
• Trim: S Line
• Version: 1.5 TFSI 35 S Line Manual FWD Euro 6 (s/s) 4dr (148 bhp)
• Year: 2021
• Mileage: 64,644 miles
• Fuel: Petrol
• Body: Saloon, 4 doors, 5 seats
• Engine: 1.5 litres, 148 bhp
• Gearbox: Manual
• Drive: Front-wheel drive
• Colour: Grey
• CO2: 133 g/km
• Emissions standard: Euro 6, ULEZ compliant

About this car

This 2021 Audi A3 S Line is advertised with 64,644 miles, approximately 21,400 above the typical mileage for its age. The AskCar estimate for this car is £15,209. It is priced at £15,642, which is £433 above that estimate. To work out the AskCar estimate, we analyse UK dealer adverts for 6,630 Audi A3 cars across different ages and specifications. The dealer may accept less: this car has been on sale for at least 131 days, and its asking price has been cut by £1,140. Its advertised mileage matches the government's MOT record. You can find this car at Days Motorpark in Swansea. How to contact the dealer and its opening hours are on this AskCar page.

Stock data as of 4 November 2026.

How we estimate prices and check cars

Price

Fair price: £433 (2%) over the AskCar estimate of £15,209.

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 6,630 priced Audi A3 adverts across different ages and specifications, as of 4 November 2026.

A 2021 Audi A3 with the 1.5 petrol engine is typically advertised at £18,000: the median of the 194 for sale on AskCar, as of 4 November 2026.

Time on sale

The dealer may accept less. This 2021 Audi A3 has been on sale for at least 131 days, and its asking price has been cut by £1,140. About 6 in 10 of 2021 Audi A3 cars are gone from sale within a month of being advertised: 419 of the 741 first advertised between 7 July 2026 and 1 October 2026.

Price history

AskCar first saw this advert on 26 June 2026 at £16,782. Its asking price is now £15,642, £1,140 less. The latest price cut was seen on 17 October 2026.

Price changes recorded:

• 26 June 2026: £16,782
• 4 August 2026: £16,499
• 15 September 2026: £15,999
• 17 October 2026: £15,642

Mileage and MOT

MOT, from the government's MOT records (DVSA, the Driver and Vehicle Standards Agency), as of 4 November 2026: valid until 16 June 2027.

It has had 4 MOTs. The latest, on 17 June 2026, passed.

There were no advisories at the latest test.

Mileage at that test: 64,642 miles, which matches the advertised 64,644 miles.

Advertised mileage is about 21,400 miles higher than the median mileage of a 2021 Audi A3 on AskCar.

Similar cars

5 other 2021 Audi A3 S Line 1.5 petrol manual saloons are for sale at UK dealers, from £15,500 to £17,999, as of 4 November 2026.

The 3 closest to this car in mileage:

• 2021 Audi A3 S Line, 1.5 petrol saloon, blue. Mileage: 63,956 miles. Price: £15,895, £253 more than this car. Dealer: Caffyns Volkswagen Brighton in Brighton and Hove. AskCar page: https://askcar.co.uk/car/audi-a3-2021-7a26f907d618
• 2021 Audi A3 S Line, 1.5 petrol saloon, grey. Mileage: 54,283 miles. Price: £15,500, £142 less than this car. Dealer: Autotrade (Birmingham) in Birmingham. AskCar page: https://askcar.co.uk/car/audi-a3-2021-f53bd309aa6a
• 2021 Audi A3 S Line, 1.5 petrol saloon, black. Mileage: 53,215 miles. Price: £15,799, £157 more than this car. Dealer: cinch in Nottingham. AskCar page: https://askcar.co.uk/car/audi-a3-2021-e12fa792e6c4