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) 4dr (148 bhp)
• Year: 2021
• Mileage: 57,500 miles
• Fuel: Petrol, mild hybrid
• Body: Saloon, 4 doors, 5 seats
• Engine: 1.5 litres, 148 bhp
• Gearbox: Automatic (S tronic)
• Drive: Front-wheel drive
• Colour: White
• CO2: 131 g/km
• Emissions standard: Euro 6, ULEZ compliant

About this car

This 2021 Audi A3 S Line has covered 57,500 miles, around 13,900 more miles than is typical for its age. The AskCar estimate for this car is £16,873. It is priced at £16,290, which is £583 below that estimate. The AskCar estimate uses 6,542 UK dealer adverts for the Audi A3, with adjustments for age, mileage, trim, engine and other specifications. We first saw this car advertised 5 days ago. Its asking price has since fallen by £310. We checked its advertised mileage against the government's MOT record, and they match. You can find this car at K Motors London in New Malden. 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: £583 (3%) under the AskCar estimate of £16,873.

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

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 £16,600. Its asking price is now £16,290, £310 less. The latest price cut was seen on 29 October 2026.

Price changes recorded:

• 28 October 2026: £16,600
• 29 October 2026: £16,290

Mileage and MOT

MOT, from the government's MOT records (DVSA, the Driver and Vehicle Standards Agency), as of 2 November 2026: valid until 25 October 2027.

It has had 4 MOTs. The latest, on 26 October 2026, passed.

There were no advisories at the latest test.

Mileage at that test: 56,475 miles, which matches the advertised 57,500 miles.

Advertised mileage is about 13,900 miles higher than the median mileage of a 2021 Audi A3 on AskCar.

Similar cars

31 other 2021 Audi A3 S Line 1.5 petrol automatic saloons are for sale at UK dealers, from £11,995 to £20,995, as of 2 November 2026.

The 3 closest to this car in mileage:

• 2021 Audi A3 S Line, 1.5 petrol saloon, blue. Mileage: 57,000 miles. Price: £12,999, £3,291 less than this car. Dealer: Field Way Motors in Gerrards Cross. AskCar page: https://askcar.co.uk/car/audi-a3-2021-af825801f8b2
• 2021 Audi A3 S Line, 1.5 petrol saloon, grey. Mileage: 57,000 miles. Price: £19,995, £3,705 more than this car. Dealer: Prestigio Motor Company in Watford. AskCar page: https://askcar.co.uk/car/audi-a3-2021-1c9d26e0fed8
• 2021 Audi A3 S Line, 1.5 petrol saloon, white. Mileage: 59,853 miles. Price: £16,400, £110 more than this car. Dealer: Invicta Chery Warrington in Warrington. AskCar page: https://askcar.co.uk/car/audi-a3-2021-9f95418af774

• The nearest: 2021 Audi A3 S Line, 1.5 petrol saloon, grey, 11 miles from this car. Mileage: 88,000 miles. Price: £14,509, £1,781 less than this car. Dealer: FM Motor Co in Wembley. AskCar page: https://askcar.co.uk/car/audi-a3-2021-491f3db77418