2021 Audi A3 1.0 TFSI S Line

Overview

• Make: Audi
• Model: A3
• Trim: S Line
• Version: 1.0 TFSI 30 S Line S tronic FWD Euro 6 (s/s) 5dr Sportback (108 bhp)
• Year: 2021
• Mileage: 31,948 miles
• Fuel: Petrol, mild hybrid
• Body: Hatchback, 5 doors, 5 seats
• Engine: 1.0 litres, 108 bhp
• Gearbox: Automatic (S tronic)
• Drive: Front-wheel drive
• Colour: Blue
• CO2: 124 g/km
• Emissions standard: Euro 6, ULEZ compliant

About this car

This 2021 Audi A3 S Line is advertised with 31,948 miles, approximately 11,600 below the typical mileage for its age. The dealer is asking £17,290, which is £468 below the AskCar estimate of £17,758. 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 31 days ago, the asking price has dropped by £500. Its advertised mileage matches the government's MOT record. The seller is Williams Select, based in Manchester. 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: £468 (2%) under the AskCar estimate of £17,758.

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 31 days.

Price history

AskCar first saw this advert on 2 October 2026 at £17,790. Its asking price is now £17,290, £500 less. The latest price cut was seen on 28 October 2026.

Price changes recorded:

• 2 October 2026: £17,790
• 28 October 2026: £17,290

Mileage and MOT

MOT, from the government's MOT records (DVSA, the Driver and Vehicle Standards Agency), as of 2 November 2026: valid until 22 March 2027.

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

There were no advisories at the latest test.

Mileage at that test: 29,461 miles, which matches the advertised 31,948 miles.

Advertised mileage is about 11,600 miles lower than the median mileage of a 2021 Audi A3 on AskCar.

Similar cars

9 other 2021 Audi A3 S Line 1.0 petrol automatic hatchbacks are for sale at UK dealers, from £15,999 to £19,000, as of 2 November 2026.

The 3 closest to this car in mileage:

• 2021 Audi A3 S Line, 1.0 petrol hatchback, grey. Mileage: 31,955 miles. Price: £17,699, £409 more than this car. Dealer: cinch Corby in Corby. AskCar page: https://askcar.co.uk/car/audi-a3-2021-02008e4d49d3
• 2021 Audi A3 S Line, 1.0 petrol hatchback, white. Mileage: 31,870 miles. Price: £17,995, £705 more than this car. Dealer: The Drivers Gallery in Bromsgrove. AskCar page: https://askcar.co.uk/car/audi-a3-2021-254ff80d0638
• 2021 Audi A3 S Line, 1.0 petrol hatchback, white. Mileage: 35,721 miles. Price: £17,490, £200 more than this car. Dealer: Winchmore Hill Car Sales in Hoddesdon. AskCar page: https://askcar.co.uk/car/audi-a3-2021-4472ddc2e5ee

• The nearest: 2021 Audi A3 S Line, 1.0 petrol hatchback, white, 18 miles from this car. Mileage: 15,710 miles. Price: £18,895, £1,605 more than this car. Dealer: Motor Trust Haslingden in Haslingden. AskCar page: https://askcar.co.uk/car/audi-a3-2021-459d909d6ad4