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: 36,118 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 36,118 miles, approximately 7,500 below the typical mileage for its age. Its asking price of £18,499 is £360 below the AskCar estimate of £18,859. The AskCar estimate draws on 6,542 Audi A3 adverts across the UK, adjusting for age, mileage, trim, engine and other specifications. Since we first spotted the advert 9 days ago, the asking price has dropped by £250. Its advertised mileage matches the government's MOT record. The seller is Motorpoint Derby, based in Derby. 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: £360 (1%) under the AskCar estimate of £18,859.

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 9 days.

Price history

AskCar first saw this advert on 24 October 2026 at £18,749. Its asking price is now £18,499, £250 less. The latest price cut was seen on 30 October 2026.

Price changes recorded:

• 24 October 2026: £18,749
• 30 October 2026: £18,499

Mileage and MOT

MOT, from the government's MOT records (DVSA, the Driver and Vehicle Standards Agency), as of 2 November 2026: valid until 28 March 2027.

It has had 4 MOTs. The latest, on 9 March 2026, passed.

There were no advisories at the latest test.

Mileage at that test: 31,803 miles, which matches the advertised 36,118 miles.

Advertised mileage is about 7,500 miles lower 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, white. Mileage: 36,385 miles. Price: £18,050, £449 less than this car. Dealer: Big Motoring World Camberley in Camberley. AskCar page: https://askcar.co.uk/car/audi-a3-2021-34419e266718
• 2021 Audi A3 S Line, 1.5 petrol hatchback, grey. Mileage: 36,386 miles. Price: £18,199, £300 less than this car. Dealer: Eastern Western Motor Group Car Deal Warehouse Glasgow in Glasgow. AskCar page: https://askcar.co.uk/car/audi-a3-2021-02d0627ca7cb
• 2021 Audi A3 S Line, 1.5 petrol hatchback, white. Mileage: 35,618 miles. Price: £17,500, £999 less than this car. Dealer: A13 Cars in Barking. AskCar page: https://askcar.co.uk/car/audi-a3-2021-45637b81b706

• The nearest: 2021 Audi A3 S Line, 1.5 petrol hatchback, grey, 12 miles from this car. Mileage: 42,342 miles. Price: £19,750, £1,251 more than this car. Dealer: Sytner Group Nottingham Audi in Nottingham. AskCar page: https://askcar.co.uk/car/audi-a3-2021-53d1a219332d