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) 5dr Sportback (148 bhp)
• Year: 2021
• Mileage: 51,730 miles
• Fuel: Petrol, mild hybrid
• Body: Hatchback, 5 doors, 5 seats
• Engine: 1.5 litres, 148 bhp
• Gearbox: Automatic (S tronic)
• Drive: Front-wheel drive
• Colour: White
• CO2: 135 g/km
• Emissions standard: Euro 6, ULEZ compliant

About this car

This 2021 Audi A3 S Line is advertised with 51,730 miles, approximately 8,100 above the typical mileage for its age. Its asking price of £17,995 is £653 above the AskCar estimate of £17,342. The AskCar estimate uses UK dealer asking prices, including 6,542 Audi A3 adverts, and accounts for the car’s age, mileage and specification. We have tracked this advert for 12 days. The government's MOT record matches its advertised mileage. You can find this car at Hawco Group in Dundee. 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: £653 (3%) over the AskCar estimate of £17,342.

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 12 days.

Price history

AskCar first saw this advert on 21 October 2026 at £17,995. 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 2 November 2026: valid until 14 June 2027.

It has had 3 MOTs. The latest, on 9 June 2026, passed.

Advisories at the latest test: rear brake disc worn, pitted or scored, but not seriously weakened.

Mileage at that test: 48,766 miles, which matches the advertised 51,730 miles.

Advertised mileage is about 8,100 miles higher than the median mileage of a 2021 Audi A3 on AskCar.

Similar cars

49 other 2021 Audi A3 S Line 1.5 petrol automatic hatchbacks are for sale at UK dealers, from £11,990 to £21,995, as of 2 November 2026.

The 3 closest to this car in mileage:

• 2021 Audi A3 S Line, 1.5 petrol hatchback, grey. Mileage: 51,550 miles. Price: £17,300, £695 less than this car. Dealer: ZG Prestige in Bolton. AskCar page: https://askcar.co.uk/car/audi-a3-2021-f0c44cb3a408
• 2021 Audi A3 S Line, 1.5 petrol hatchback, grey. Mileage: 52,428 miles. Price: £17,495, £500 less than this car. Dealer: Shakespeare Street Garage in Lincoln. AskCar page: https://askcar.co.uk/car/audi-a3-2021-019e381a240d
• 2021 Audi A3 S Line, 1.5 petrol hatchback, black. Mileage: 52,896 miles. Price: £16,500, £1,495 less than this car. Dealer: Holden Kia in Norwich. AskCar page: https://askcar.co.uk/car/audi-a3-2021-e14daca808a1

• The nearest: 2021 Audi A3 S Line, 1.5 petrol hatchback, white, 61 miles from this car. Mileage: 48,200 miles. Price: £17,060, £935 less than this car. Dealer: Evans Halshaw Ford Motherwell in Motherwell. AskCar page: https://askcar.co.uk/car/audi-a3-2021-1e9202be6004