2021 Audi A3 1.5 TFSI S Line

Overview

• Make: Audi
• Model: A3
• Trim: S Line
• Version: 1.5 TFSI 35 S Line Manual FWD Euro 6 (s/s) 5dr Sportback (148 bhp)
• Year: 2021
• Mileage: 26,584 miles
• Fuel: Petrol
• Body: Hatchback, 5 doors, 5 seats
• Engine: 1.5 litres, 148 bhp
• Gearbox: Manual
• Drive: Front-wheel drive
• Colour: Black
• CO2: 136 g/km
• Emissions standard: Euro 6, ULEZ compliant

About this car

With 26,584 miles on the clock, this 2021 Audi A3 S Line has done roughly 17,000 fewer miles than a typical 2021 Audi A3. Its asking price of £17,799 is £175 below the AskCar estimate of £17,974. 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 recorded this car for sale 3 days ago. The government's MOT record matches its advertised mileage. You can find this car at cinch Corby in North Northamptonshire. 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: £175 (under 1%) under the AskCar estimate of £17,974.

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 3 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 30 October 2026 at £17,599. Its asking price is now £17,799, £200 more.

Price changes recorded:

• 30 October 2026: £17,599
• 31 October 2026: £17,799

Mileage and MOT

MOT, from the government's MOT records (DVSA, the Driver and Vehicle Standards Agency), as of 2 November 2026: valid until 21 October 2027.

It has had 3 MOTs. The latest, on 22 October 2026, passed.

There were no advisories at the latest test.

Mileage at that test: 26,581 miles, which matches the advertised 26,584 miles.

Advertised mileage is about 17,000 miles lower than the median mileage of a 2021 Audi A3 on AskCar.

Similar cars

20 other 2021 Audi A3 S Line 1.5 petrol manual hatchbacks are for sale at UK dealers, from £12,895 to £18,490, as of 2 November 2026.

The 3 closest to this car in mileage:

• 2021 Audi A3 S Line, 1.5 petrol hatchback, grey. Mileage: 26,224 miles. Price: £17,670, £129 less than this car. Dealer: Big Motoring World Blue Bell Hill in Blue Bell Hill. AskCar page: https://askcar.co.uk/car/audi-a3-2021-3d5ebf92bd6d
• 2021 Audi A3 S Line, 1.5 petrol hatchback, white. Mileage: 30,281 miles. Price: £16,995, £804 less than this car. Dealer: Sycamore Stamford in Stamford. AskCar page: https://askcar.co.uk/car/audi-a3-2021-95bc1d4fec91
• 2021 Audi A3 S Line, 1.5 petrol hatchback, white. Mileage: 30,408 miles. Price: £18,490, £691 more than this car. Dealer: Harwoods Southampton Audi in Southampton. AskCar page: https://askcar.co.uk/car/audi-a3-2021-f4f13ee81afb