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: 49,770 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 has covered 49,770 miles, around 7,300 more miles than is typical for its age. Priced at £16,995, it is advertised £333 below the AskCar estimate of £17,328. The AskCar estimate uses UK dealer asking prices, including 6,620 Audi A3 adverts, and accounts for the car’s age, mileage and specification. We have tracked this advert today. The government's MOT record matches its advertised mileage. It is advertised by Lake District Audi in Grange Over Sands. How to contact the dealer and its opening hours are on this AskCar page.

Stock data as of 8 November 2026.

How we estimate prices and check cars

Price

Fair price: £333 (1%) under the AskCar estimate of £17,328.

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 6,620 priced Audi A3 adverts across different ages and specifications, as of 8 November 2026.

A 2021 Audi A3 with the 1.5 petrol engine is typically advertised at £18,000: the median of the 194 for sale on AskCar, as of 8 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: 440 of the 782 first advertised between 8 July 2026 and 5 October 2026.

Price history

AskCar first saw this advert on 8 November 2026 at £16,995. 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 8 November 2026: valid until 18 March 2027.

It has had 3 MOTs. The latest, on 19 March 2026, passed.

There were no advisories at the latest test.

Mileage at that test: 44,819 miles, which matches the advertised 49,770 miles.

Advertised mileage is about 7,300 miles higher than the median mileage of a 2021 Audi A3 on AskCar.

Similar cars

53 other 2021 Audi A3 S Line 1.5 petrol automatic hatchbacks are for sale at UK dealers, from £11,840 to £21,995, as of 8 November 2026.

The 3 closest to this car in mileage:

• 2021 Audi A3 S Line, 1.5 petrol hatchback, white. Mileage: 50,500 miles. Price: £16,790, £205 less than this car. Dealer: K Motors London in New Malden. AskCar page: https://askcar.co.uk/car/audi-a3-2021-955301d556ce
• 2021 Audi A3 S Line, 1.5 petrol hatchback, white. Mileage: 48,200 miles. Price: £16,850, £145 less than this car. Dealer: Evans Halshaw Ford Motherwell in Motherwell. AskCar page: https://askcar.co.uk/car/audi-a3-2021-1e9202be6004
• 2021 Audi A3 S Line, 1.5 petrol hatchback, grey. Mileage: 51,550 miles. Price: £17,300, £305 more than this car. Dealer: ZG Prestige in Bolton. AskCar page: https://askcar.co.uk/car/audi-a3-2021-f0c44cb3a408

• The nearest: 2021 Audi A3 S Line, 1.5 petrol hatchback, black, 39 miles from this car. Mileage: 59,270 miles. Price: £16,989, the same price as this car. Dealer: Autobarn Motor Company in Burnley. AskCar page: https://askcar.co.uk/car/audi-a3-2021-aa6f0eaaec11