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: 40,230 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: White
• CO2: 120 g/km
• Emissions standard: Euro 6, ULEZ compliant

About this car

This 2021 Audi A3 S Line has covered 40,230 miles, around 3,400 fewer miles than is typical for its age. The dealer is asking £17,150, which is £208 below the AskCar estimate of £17,358. To work out the AskCar estimate, we analyse UK dealer adverts for 6,542 Audi A3 cars across different ages and specifications. We have tracked this advert for 5 days. According to the government's MOT record, its advertised mileage is consistent with the latest test. The seller is Group 1 Automotive Chingford Audi, based in Chingford. 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: £208 (1%) under the AskCar estimate of £17,358.

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

AskCar first saw this 2021 Audi A3 advertised 5 days ago. 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 28 October 2026 at £17,150. Its asking price has not changed.

Mileage and MOT

MOT, from the government's MOT records (DVSA, the Driver and Vehicle Standards Agency), as of 2 November 2026: valid until 23 August 2027.

It has had 5 MOTs. The latest, on 24 July 2026, passed.

There were no advisories at the latest test.

Mileage at that test: 39,193 miles, which matches the advertised 40,230 miles.

Advertised mileage is about 3,400 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, white. Mileage: 39,230 miles. Price: £17,599, £449 more 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, black. Mileage: 43,783 miles. Price: £16,640, £510 less than this car. Dealer: Days Motorpark Cardiff in Cardiff. AskCar page: https://askcar.co.uk/car/audi-a3-2021-9f61b144cbb9
• 2021 Audi A3 S Line, 1.0 petrol saloon, yellow. Mileage: 46,404 miles. Price: £16,190, £960 less than this car. Dealer: Sidegate Motors in Great Yarmouth. AskCar page: https://askcar.co.uk/car/audi-a3-2021-d94355ab1498

• The nearest: 2021 Audi A3 S Line, 1.0 petrol saloon, black, 17 miles from this car. Mileage: 28,000 miles. Price: £19,995, £2,845 more than this car. Dealer: Prestigio Motor Company in Watford. AskCar page: https://askcar.co.uk/car/audi-a3-2021-26fe8859ed29