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: 39,000 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: Black
• CO2: 131 g/km
• Emissions standard: Euro 6, ULEZ compliant

About this car

This 2021 Audi A3 S Line has covered 39,000 miles. Priced at £20,995, it is advertised £2,360 above the AskCar estimate of £18,635. The AskCar estimate uses UK dealer asking prices, including 6,542 Audi A3 adverts, and accounts for the car’s age, mileage and specification. It first appeared in our advert records 39 days ago. Ask the dealer why the advert shows fewer miles than the 39,952 recorded at the latest MOT. The latest recorded MOT expires on 20 September 2027. It is for sale 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: £2,360 (12%) over the AskCar estimate of £18,635.

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 39 days.

Price history

AskCar first saw this advert on 24 September 2026 at £20,995. 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 20 September 2027.

It has had 3 MOTs. The latest, on 21 September 2026, passed.

There were no advisories at the latest test.

Mileage at that test: 39,952 miles. The advert says 39,000 miles, fewer than the MOT record, so ask the dealer which is right.

Advertised mileage is about 4,600 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 £20,950, as of 2 November 2026.

The 3 closest to this car in mileage:

• 2021 Audi A3 S Line, 1.5 petrol saloon, blue. Mileage: 39,502 miles. Price: £18,049, £2,946 less than this car. Dealer: Motorpoint Newport in Newport. AskCar page: https://askcar.co.uk/car/audi-a3-2021-c9ea56239f41
• 2021 Audi A3 S Line, 1.5 petrol saloon, black. Mileage: 40,772 miles. Price: £16,370, £4,625 less than this car. Dealer: Hilton Garage in Derby. AskCar page: https://askcar.co.uk/car/audi-a3-2021-8cea3620043c
• 2021 Audi A3 S Line, 1.5 petrol saloon, grey. Mileage: 41,000 miles. Price: £18,595, £2,400 less than this car. Dealer: T & S Elite Cars in Kingston upon Hull. AskCar page: https://askcar.co.uk/car/audi-a3-2021-3efd6aa0f4e5

• The nearest: 2021 Audi A3 S Line, 1.5 petrol saloon, grey, under a mile from this car. Mileage: 57,000 miles. Price: £19,995, £1,000 less than this car. Dealer: Prestigio Motor Company in Watford. AskCar page: https://askcar.co.uk/car/audi-a3-2021-1c9d26e0fed8