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: 57,000 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: Grey
• CO2: 131 g/km
• Emissions standard: Euro 6, ULEZ compliant

About this car

With 57,000 miles on the clock, this 2021 Audi A3 S Line has done roughly 13,400 more miles than a typical 2021 Audi A3. Its asking price of £19,995 is £3,077 above the AskCar estimate of £16,918. The AskCar estimate uses 6,542 UK dealer adverts for the Audi A3, with adjustments for age, mileage, trim, engine and other specifications. We have tracked this advert for 12 days. Its advertised mileage matches the government's MOT record. You can find this car at Prestigio Motor Company in Watford. 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

Above the going rate: £3,077 (18%) over the AskCar estimate of £16,918.

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 £19,995. 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 23 April 2027.

It has had 3 MOTs. The latest, on 26 March 2026, passed.

Advisories at the latest test: nearside rear shock absorbers has light misting of oil; items removed from driver's view prior to test.

Mileage at that test: 52,805 miles, which matches the advertised 57,000 miles.

Advertised mileage is about 13,400 miles higher 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, blue. Mileage: 57,000 miles. Price: £12,999, £6,996 less than this car. Dealer: Field Way Motors in Gerrards Cross. AskCar page: https://askcar.co.uk/car/audi-a3-2021-af825801f8b2
• 2021 Audi A3 S Line, 1.5 petrol saloon, white. Mileage: 57,500 miles. Price: £16,290, £3,705 less than this car. Dealer: K Motors London in New Malden. AskCar page: https://askcar.co.uk/car/audi-a3-2021-b8cbd85642b8
• 2021 Audi A3 S Line, 1.5 petrol saloon, black. Mileage: 55,000 miles. Price: £17,304, £2,691 less than this car. Dealer: Shepshed Ford in Shepshed. AskCar page: https://askcar.co.uk/car/audi-a3-2021-eae480dfac43

• The nearest: 2021 Audi A3 S Line, 1.5 petrol saloon, black, under a mile from this car. Mileage: 39,000 miles. Price: £20,995, £1,000 more than this car. Dealer: Prestigio Motor Company in Watford. AskCar page: https://askcar.co.uk/car/audi-a3-2021-1a321b81a2e4