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: 23,100 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: Grey
• CO2: 135 g/km
• Emissions standard: Euro 6, ULEZ compliant

About this car

This 2021 Audi A3 S Line has covered 23,100 miles, around 20,500 fewer miles than is typical for its age. Its asking price of £19,800 is £278 below the AskCar estimate of £20,078. 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 62 days, and its asking price has been cut by £200. We checked its advertised mileage against the government's MOT record, and they match. The seller is Walters Motor Group - Loddon, based in Norwich. 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: £278 (1%) under the AskCar estimate of £20,078.

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 62 days, and its asking price has been cut by £200. 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 1 September 2026 at £20,000. Its asking price is now £19,800, £200 less. The latest price cut was seen on 23 October 2026.

Price changes recorded:

• 1 September 2026: £20,000
• 7 October 2026: £19,900
• 23 October 2026: £19,800

Mileage and MOT

MOT, from the government's MOT records (DVSA, the Driver and Vehicle Standards Agency), as of 2 November 2026: valid until 3 February 2027.

It has had 3 MOTs. The latest, on 4 February 2026, passed.

Advisories at the latest test: offside front windscreen wiper blade defective smearing slightly.

Mileage at that test: 16,413 miles, which matches the advertised 23,100 miles.

Advertised mileage is about 20,500 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, £467 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, white. Mileage: 22,443 miles. Price: £19,449, £351 less than this car. Dealer: Motorpoint Widnes in Widnes. AskCar page: https://askcar.co.uk/car/audi-a3-2021-9770c3319a01
• 2021 Audi A3 S Line, 1.5 petrol hatchback, blue. Mileage: 22,000 miles. Price: £21,995, £2,195 more than this car. Dealer: AM Autohaus in Slough. AskCar page: https://askcar.co.uk/car/audi-a3-2021-58a7db9d6038

• The nearest: 2021 Audi A3 S Line, 1.5 petrol hatchback, black, 11 miles from this car. Mileage: 52,896 miles. Price: £16,500, £3,300 less than this car. Dealer: Holden Kia in Norwich. AskCar page: https://askcar.co.uk/car/audi-a3-2021-e14daca808a1