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: 31,821 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: Red
• CO2: 135 g/km
• Emissions standard: Euro 6, ULEZ compliant

About this car

At 31,821 miles, this 2021 Audi A3 S Line has covered about 11,800 fewer miles than other 2021 Audi A3 cars. The dealer is asking £19,299, the same as the AskCar estimate. To work out the AskCar estimate, we analyse UK dealer adverts for 6,542 Audi A3 cars across different ages and specifications. It first appeared in our advert records 33 days ago. According to the government's MOT record, its advertised mileage is consistent with the latest test. It is advertised by cinch Corby in North Northamptonshire. 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: the same as the AskCar estimate of £19,299.

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 33 days.

Price history

AskCar first saw this advert on 30 September 2026 at £18,999. Its asking price is now £19,299, £300 more.

Price changes recorded:

• 30 September 2026: £18,999
• 1 October 2026: £19,399
• 17 October 2026: £19,299

Mileage and MOT

MOT, from the government's MOT records (DVSA, the Driver and Vehicle Standards Agency), as of 2 November 2026: valid until 4 September 2027.

It has had 3 MOTs. The latest, on 5 September 2026, passed.

There were no advisories at the latest test.

Mileage at that test: 31,813 miles, which matches the advertised 31,821 miles.

Advertised mileage is about 11,800 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: 31,894 miles. Price: £20,750, £1,451 more than this car. Dealer: Sytner Group Leicester Audi in Leicester. AskCar page: https://askcar.co.uk/car/audi-a3-2021-f9136d8c47ea
• 2021 Audi A3 S Line, 1.5 petrol hatchback, white. Mileage: 32,000 miles. Price: £17,880, £1,419 less than this car. Dealer: Wembley Prestige Cars in Watford. AskCar page: https://askcar.co.uk/car/audi-a3-2021-80778e445c31
• 2021 Audi A3 S Line, 1.5 petrol hatchback, grey. Mileage: 32,574 miles. Price: £20,330, £1,031 more than this car. Dealer: Prestige Cars Of Essex in Harlow. AskCar page: https://askcar.co.uk/car/audi-a3-2021-86742b42df02

• The nearest: 2021 Audi A3 S Line, 1.5 petrol hatchback, blue, 18 miles from this car. Mileage: 108,000 miles. Price: £13,290, £6,009 less than this car. Dealer: Motor Zone Peterborough in Peterborough. AskCar page: https://askcar.co.uk/car/audi-a3-2021-1ac13350ca25