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) 5dr Sportback (148 bhp)
• Year: 2021
• Mileage: 22,443 miles
• Fuel: Petrol, mild hybrid
• Body: Hatchback, 5 doors, 5 seats
• Engine: 1.5 litres, 148 bhp
• Gearbox: Automatic (S tronic)
• Drive: Front-wheel drive
• Colour: White
• CO2: 135 g/km
• Emissions standard: Euro 6, ULEZ compliant

About this car

With 22,443 miles on the clock, this 2021 Audi A3 S Line has done roughly 21,200 fewer miles than a typical 2021 Audi A3. Its asking price of £19,449 is £686 below the AskCar estimate of £20,135. To work out the AskCar estimate, we analyse UK dealer adverts for 6,542 Audi A3 cars across different ages and specifications. Since we first spotted the advert 30 days ago, the asking price has dropped by £1,350. We checked its advertised mileage against the government's MOT record, and they match. The seller is Motorpoint Widnes, based in Widnes. 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: £686 (3%) under the AskCar estimate of £20,135.

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

This 2021 Audi A3 has been on sale for at least 30 days.

Price history

AskCar first saw this advert on 3 October 2026 at £20,799. Its asking price is now £19,449, £1,350 less. The latest price cut was seen on 27 October 2026.

Price changes recorded:

• 3 October 2026: £20,799
• 6 October 2026: £19,849
• 13 October 2026: £19,799
• 20 October 2026: £19,549
• 27 October 2026: £19,449

Mileage and MOT

MOT, from the government's MOT records (DVSA, the Driver and Vehicle Standards Agency), as of 2 November 2026: valid until 11 April 2027.

It has had 3 MOTs. The latest, on 10 April 2026, passed.

There were no advisories at the latest test.

Mileage at that test: 21,749 miles, which matches the advertised 22,443 miles.

Advertised mileage is about 21,200 miles lower than the median mileage of a 2021 Audi A3 on AskCar.

Similar cars

49 other 2021 Audi A3 S Line 1.5 petrol automatic hatchbacks are for sale at UK dealers, from £11,990 to £21,995, as of 2 November 2026.

The 3 closest to this car in mileage:

• 2021 Audi A3 S Line, 1.5 petrol hatchback, grey. Mileage: 22,860 miles. Price: £20,267, £818 more than this car. Dealer: Vindis Group Cambridge Audi in Cambridge. AskCar page: https://askcar.co.uk/car/audi-a3-2021-029c0fd1604c
• 2021 Audi A3 S Line, 1.5 petrol hatchback, blue. Mileage: 22,000 miles. Price: £21,995, £2,546 more than this car. Dealer: AM Autohaus in Slough. AskCar page: https://askcar.co.uk/car/audi-a3-2021-58a7db9d6038
• 2021 Audi A3 S Line, 1.5 petrol hatchback, grey. Mileage: 23,100 miles. Price: £19,800, £351 more than this car. Dealer: Walters Motor Group - Loddon in Norwich. AskCar page: https://askcar.co.uk/car/audi-a3-2021-086787b0735c

• The nearest: 2021 Audi A3 S Line, 1.5 petrol hatchback, grey, 17 miles from this car. Mileage: 47,445 miles. Price: £17,880, £1,569 less than this car. Dealer: Vehicle Select in Bolton. AskCar page: https://askcar.co.uk/car/audi-a3-2021-81fb582f93b3