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: 33,764 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 33,764 miles, this 2021 Audi A3 S Line has covered about 9,800 fewer miles than other 2021 Audi A3 cars. Its asking price of £19,199 is £33 above the AskCar estimate of £19,166. To work out the AskCar estimate, we analyse UK dealer adverts for 6,542 Audi A3 cars across different ages and specifications. This car was first seen in our listings data 13 days ago. We checked its advertised mileage against the government's MOT record, and they match. The seller is Cinch Ev Superstore 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: £33 (under 1%) over the AskCar estimate of £19,166.

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 13 days.

Price history

AskCar first saw this advert on 20 October 2026 at £19,199. 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 6 March 2027.

It has had 3 MOTs. The latest, on 7 March 2026, passed.

There were no advisories at the latest test.

Mileage at that test: 30,194 miles, which matches the advertised 33,764 miles.

Advertised mileage is about 9,800 miles lower than the median mileage of a 2021 Audi A3 on AskCar.

Similar cars

31 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 2 November 2026.

The 3 closest to this car in mileage:

• 2021 Audi A3 S Line, 1.5 petrol saloon, grey. Mileage: 33,869 miles. Price: £18,995, £204 less than this car. Dealer: Banchory Car Centre in Banchory. AskCar page: https://askcar.co.uk/car/audi-a3-2021-57778ec890a1
• 2021 Audi A3 S Line, 1.5 petrol saloon, white. Mileage: 32,077 miles. Price: £18,795, £404 less than this car. Dealer: Car Brothers NI in Newtownabbey. AskCar page: https://askcar.co.uk/car/audi-a3-2021-21b9c79555a3
• 2021 Audi A3 S Line, 1.5 petrol saloon, black. Mileage: 31,587 miles. Price: £20,950, £1,751 more than this car. Dealer: Group 1 Automotive Chingford Audi in Chingford. AskCar page: https://askcar.co.uk/car/audi-a3-2021-6c4c89e0748f

• The nearest: 2021 Audi A3 S Line, 1.5 petrol saloon, black, 9 miles from this car. Mileage: 40,772 miles. Price: £16,370, £2,829 less than this car. Dealer: Hilton Garage in Derby. AskCar page: https://askcar.co.uk/car/audi-a3-2021-8cea3620043c