2021 Audi A3 1.0 TFSI S Line

Overview

• Make: Audi
• Model: A3
• Trim: S Line
• Version: 1.0 30 TFSI S Line S tronic FWD Euro 6 4dr (108 bhp)
• Year: 2021
• Mileage: 27,468 miles
• Fuel: Petrol, mild hybrid
• Body: Saloon, 4 doors, 5 seats
• Engine: 1.0 litres, 108 bhp
• Gearbox: Automatic (S tronic)
• Drive: Front-wheel drive
• Colour: Black
• CO2: 120 g/km
• Emissions standard: Euro 6, ULEZ compliant

About this car

This 2021 Audi A3 S Line is advertised with 27,468 miles, approximately 16,100 below the typical mileage for its age. Priced at £18,498, it is advertised £41 below the AskCar estimate of £18,539. The AskCar estimate draws on 6,542 Audi A3 adverts across the UK, adjusting for age, mileage, trim, engine and other specifications. We first saw this car advertised 27 days ago. Its asking price has since fallen by £500. According to the government's MOT record, its advertised mileage is consistent with the latest test. The seller is Arnold Clark Glasgow Kia / OMODA / JAECOO, based in Glasgow. 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: £41 (under 1%) under the AskCar estimate of £18,539.

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 1.0 petrol engine is typically advertised at £15,000: the median of the 87 for sale on AskCar, as of 2 November 2026.

Time on sale

This 2021 Audi A3 has been on sale for at least 27 days.

Price history

AskCar first saw this advert on 6 October 2026 at £18,998. Its asking price is now £18,498, £500 less. The latest price cut was seen on 30 October 2026.

Price changes recorded:

• 6 October 2026: £18,998
• 23 October 2026: £18,698
• 30 October 2026: £18,498

Mileage and MOT

MOT, from the government's MOT records (DVSA, the Driver and Vehicle Standards Agency), as of 2 November 2026: valid until 8 September 2027.

It has had 3 MOTs. The latest, on 25 August 2026, passed.

There were no advisories at the latest test.

Mileage at that test: 27,468 miles, which matches the advertised 27,468 miles.

Advertised mileage is about 16,100 miles lower than the median mileage of a 2021 Audi A3 on AskCar.

Similar cars

5 other 2021 Audi A3 S Line 1.0 petrol automatic saloons are for sale at UK dealers, from £16,190 to £19,995, as of 2 November 2026.

The 3 closest to this car in mileage:

• 2021 Audi A3 S Line, 1.0 petrol saloon, black. Mileage: 28,000 miles. Price: £19,995, £1,497 more than this car. Dealer: Prestigio Motor Company in Watford. AskCar page: https://askcar.co.uk/car/audi-a3-2021-26fe8859ed29
• 2021 Audi A3 S Line, 1.0 petrol saloon, white. Mileage: 39,230 miles. Price: £17,599, £899 less than this car. Dealer: Fords Of Winsford Car Supermarket in Winsford. AskCar page: https://askcar.co.uk/car/audi-a3-2021-41bd291aee1e
• 2021 Audi A3 S Line, 1.0 petrol saloon, white. Mileage: 40,230 miles. Price: £17,150, £1,348 less than this car. Dealer: Group 1 Automotive Chingford Audi in Chingford. AskCar page: https://askcar.co.uk/car/audi-a3-2021-7c523805809a