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: 22,176 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: Grey
• CO2: 135 g/km
• Emissions standard: Euro 6, ULEZ compliant

About this car

At 22,176 miles, this 2021 Audi A3 S Line has covered about 20,400 fewer miles than other 2021 Audi A3 cars. Its asking price of £19,140 is £860 below the AskCar estimate of £20,000. The AskCar estimate uses UK dealer asking prices, including 6,645 Audi A3 adverts, and accounts for the car’s age, mileage and specification. This car was first seen in our listings data 2 days ago. According to the government's MOT record, its advertised mileage is consistent with the latest test. The seller is Evans Halshaw Citroen Hull, based in Hull. How to contact the dealer and its opening hours are on this AskCar page.

Stock data as of 5 November 2026.

How we estimate prices and check cars

Price

Fair price: £860 (4%) under the AskCar estimate of £20,000.

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 6,645 priced Audi A3 adverts across different ages and specifications, as of 5 November 2026.

A 2021 Audi A3 with the 1.5 petrol engine is typically advertised at £18,000: the median of the 200 for sale on AskCar, as of 5 November 2026.

Time on sale

AskCar first saw this 2021 Audi A3 advertised 2 days ago. About 6 in 10 of 2021 Audi A3 cars are gone from sale within a month of being advertised: 426 of the 756 first advertised between 7 July 2026 and 2 October 2026.

Price history

AskCar first saw this advert on 3 November 2026 at £19,140. 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 5 November 2026: valid until 18 June 2027.

It has had 6 MOTs. The latest, on 19 June 2026, passed.

There were no advisories at the latest test.

Mileage at that test: 21,320 miles, which matches the advertised 22,176 miles.

Advertised mileage is about 20,400 miles lower than the median mileage of a 2021 Audi A3 on AskCar.

Similar cars

55 other 2021 Audi A3 S Line 1.5 petrol automatic hatchbacks are for sale at UK dealers, from £11,990 to £21,995, as of 5 November 2026.

The 3 closest to this car in mileage:

• 2021 Audi A3 S Line, 1.5 petrol hatchback, blue. Mileage: 22,000 miles. Price: £21,995, £2,855 more than this car. Dealer: AM Autohaus in Slough. AskCar page: https://askcar.co.uk/car/audi-a3-2021-58a7db9d6038
• 2021 Audi A3 S Line, 1.5 petrol hatchback, white. Mileage: 22,443 miles. Price: £19,299, £159 more than this car. Dealer: Motorpoint Widnes in Widnes. AskCar page: https://askcar.co.uk/car/audi-a3-2021-9770c3319a01
• 2021 Audi A3 S Line, 1.5 petrol hatchback, white. Mileage: 21,684 miles. Price: £19,649, £509 more than this car. Dealer: Halliwell Jones Premium Trade Cars Southport in Southport. AskCar page: https://askcar.co.uk/car/audi-a3-2021-296d3558ff7f

• The nearest: 2021 Audi A3 S Line, 1.5 petrol hatchback, grey, 35 miles from this car. Mileage: 52,428 miles. Price: £17,495, £1,645 less than this car. Dealer: Shakespeare Street Garage in Lincoln. AskCar page: https://askcar.co.uk/car/audi-a3-2021-019e381a240d