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: 26,224 miles
• Fuel: Petrol
• Body: Hatchback, 5 doors, 5 seats
• Engine: 1.5 litres, 148 bhp
• Gearbox: Manual
• Drive: Front-wheel drive
• Colour: Grey
• CO2: 136 g/km
• Emissions standard: Euro 6, ULEZ compliant

About this car

At 26,224 miles, this 2021 Audi A3 S Line has covered about 17,400 fewer miles than other 2021 Audi A3 cars. Priced at £17,670, it is advertised £332 below the AskCar estimate of £18,002. The AskCar estimate draws on 6,542 Audi A3 adverts across the UK, adjusting for age, mileage, trim, engine and other specifications. We first recorded this advert 14 days ago, and its asking price has since fallen by £2,390. Its advertised mileage matches the government's MOT record. It is for sale at Big Motoring World Blue Bell Hill in Chatham. 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: £332 (1%) under the AskCar estimate of £18,002.

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

This 2021 Audi A3 has been on sale for at least 14 days.

Price history

AskCar first saw this advert on 19 October 2026 at £20,060. Its asking price is now £17,670, £2,390 less. The latest price cut was seen on 28 October 2026.

Price changes recorded:

• 19 October 2026: £20,060
• 21 October 2026: £17,740
• 22 October 2026: £17,730
• 27 October 2026: £17,850
• 28 October 2026: £17,670

Mileage and MOT

MOT, from the government's MOT records (DVSA, the Driver and Vehicle Standards Agency), as of 2 November 2026: valid until 19 October 2027.

It failed its MOT on 2 October 2026 (nearside front tyre has a cut in excess of the requirements deep enough to reach the ply or cords) and passed 6 days later, on 8 October 2026.

There were no advisories at the latest test.

Mileage at that test: 26,213 miles, which matches the advertised 26,224 miles.

Advertised mileage is about 17,400 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, black. Mileage: 26,584 miles. Price: £17,799, £129 more than this car. Dealer: cinch Corby in Corby. AskCar page: https://askcar.co.uk/car/audi-a3-2021-e9e074192c98
• 2021 Audi A3 S Line, 1.5 petrol hatchback, blue. Mileage: 22,500 miles. Price: £18,350, £680 more than this car. Dealer: Keith Motors Verwood in Verwood. AskCar page: https://askcar.co.uk/car/audi-a3-2021-5d0309d02188
• 2021 Audi A3 S Line, 1.5 petrol hatchback, white. Mileage: 30,281 miles. Price: £16,995, £675 less than this car. Dealer: Sycamore Stamford in Stamford. AskCar page: https://askcar.co.uk/car/audi-a3-2021-95bc1d4fec91

• The nearest: 2021 Audi A3 S Line, 1.5 petrol hatchback, white, under a mile from this car. Mileage: 44,792 miles. Price: £15,710, £1,960 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-d76776fc4f0b