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: 39,000 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

At 39,000 miles, this 2021 Audi A3 S Line has covered about 3,600 fewer miles than other 2021 Audi A3 cars. Its asking price of £16,990 is £1,627 below the AskCar estimate of £18,617. The AskCar estimate draws on 6,645 Audi A3 adverts across the UK, adjusting for age, mileage, trim, engine and other specifications. It first appeared in our advert records today. According to the government's MOT record, its advertised mileage is consistent with the latest test. The seller is Bedford Car Centres, based in Bedford. How to contact the dealer and its opening hours are on this AskCar page.

Stock data as of 5 November 2026.

How we estimate prices and check cars

Price

Good value: £1,627 (8%) under the AskCar estimate of £18,617.

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 6,645 priced Audi A3 adverts across different ages and specifications, as of 5 November 2026.

A 2021 Audi A3 with the 1.5 petrol engine is typically advertised at £18,000: the median of the 200 for sale on AskCar, as of 5 November 2026.

Time on sale

AskCar first saw this 2021 Audi A3 advertised today. About 6 in 10 of 2021 Audi A3 cars are gone from sale within a month of being advertised: 426 of the 756 first advertised between 7 July 2026 and 2 October 2026.

Price history

AskCar first saw this advert on 5 November 2026 at £16,990. 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 5 November 2026: valid until 3 June 2027.

It failed its MOT on 21 May 2026 (nearside rear tyre has a cut in excess of the requirements deep enough to reach the ply or cords) and passed 1 day later, on 22 May 2026.

There were no advisories at the latest test.

Mileage at that test: 35,244 miles, which matches the advertised 39,000 miles.

Advertised mileage is about 3,600 miles lower than the median mileage of a 2021 Audi A3 on AskCar.

Similar cars

29 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 5 November 2026.

The 3 closest to this car in mileage:

• 2021 Audi A3 S Line, 1.5 petrol saloon, black. Mileage: 39,000 miles. Price: £20,995, £4,005 more than this car. Dealer: Prestigio Motor Company in Watford. AskCar page: https://askcar.co.uk/car/audi-a3-2021-1a321b81a2e4
• 2021 Audi A3 S Line, 1.5 petrol saloon, blue. Mileage: 39,502 miles. Price: £18,099, £1,109 more than this car. Dealer: Motorpoint Newport in Newport. AskCar page: https://askcar.co.uk/car/audi-a3-2021-c9ea56239f41
• 2021 Audi A3 S Line, 1.5 petrol saloon, grey. Mileage: 41,000 miles. Price: £18,595, £1,605 more than this car. Dealer: T & S Elite Cars in Kingston upon Hull. AskCar page: https://askcar.co.uk/car/audi-a3-2021-3efd6aa0f4e5

• The nearest: 2021 Audi A3 S Line, 1.5 petrol saloon, black, 12 miles from this car. Mileage: 36,644 miles. Price: £18,180, £1,190 more than this car. Dealer: Evans Halshaw BYD Milton Keynes in Milton Keynes. AskCar page: https://askcar.co.uk/car/audi-a3-2021-591d7c0e70ce