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: 52,593 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: Black
• CO2: 135 g/km
• Emissions standard: Euro 6, ULEZ compliant

About this car

With 52,593 miles on the clock, this 2021 Audi A3 S Line has done roughly 8,900 more miles than a typical 2021 Audi A3. The AskCar estimate for this car is £16,998. It is priced at £17,495, which is £497 above that estimate. The AskCar estimate draws on 6,763 Audi A3 adverts across the UK, adjusting for age, mileage, trim, engine and other specifications. We have tracked this advert today. Its advertised mileage matches the government's MOT record. It is advertised by A1 Auto Solutions in Maidenhead. How to contact the dealer and its opening hours are on this AskCar page.

Stock data as of 14 November 2026.

How we estimate prices and check cars

Price

Fair price: £497 (2%) over the AskCar estimate of £16,998.

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 6,763 priced Audi A3 adverts across different ages and specifications, as of 14 November 2026.

A 2021 Audi A3 with the 1.5 petrol engine is typically advertised at £17,500: the median of the 186 for sale on AskCar, as of 14 November 2026.

Time on sale

AskCar first saw this 2021 Audi A3 advertised today. About 6 in 10 of 2021 Audi A3 cars are gone from sale within a month of being advertised: 470 of the 834 first advertised between 14 July 2026 and 11 October 2026.

Price history

AskCar first saw this advert on 14 November 2026 at £17,495. 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 14 November 2026: valid until 30 July 2027.

It has had 3 MOTs. The latest, on 30 July 2026, passed.

Advisories at the latest test: front registration plate deteriorated but not likely to be misread; rear registration plate deteriorated but not likely to be misread; front tyre slightly damaged/cracking or perishing both O/S and N/S; and 1 more.

Mileage at that test: 50,736 miles, which matches the advertised 52,593 miles.

Advertised mileage is about 8,900 miles higher than the median mileage of a 2021 Audi A3 on AskCar.

Similar cars

58 other 2021 Audi A3 S Line 1.5 petrol automatic hatchbacks are for sale at UK dealers, from £11,495 to £21,995, as of 14 November 2026.

The 3 closest to this car in mileage:

• 2021 Audi A3 S Line, 1.5 petrol hatchback, grey. Mileage: 52,428 miles. Price: £17,495, the same price as 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: £16,000, £1,495 less than this car. Dealer: Holden Kia in Norwich. AskCar page: https://askcar.co.uk/car/audi-a3-2021-e14daca808a1
• 2021 Audi A3 S Line, 1.5 petrol hatchback, grey. Mileage: 51,829 miles. Price: £16,900, £595 less than this car. Dealer: Sytner Select Wakefield in Wakefield. AskCar page: https://askcar.co.uk/car/audi-a3-2021-7bd3f80d9252

• The nearest: 2021 Audi A3 S Line, 1.5 petrol hatchback, blue, 4 miles from this car. Mileage: 22,000 miles. Price: £21,995, £4,500 more than this car. Dealer: AM Autohaus in Slough. AskCar page: https://askcar.co.uk/car/audi-a3-2021-58a7db9d6038