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: 13,434 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 13,434 miles, around 30,100 fewer miles than is typical for its age. Priced at £21,000, it is advertised £371 above the AskCar estimate of £20,629. The AskCar estimate draws on 6,629 Audi A3 adverts across the UK, adjusting for age, mileage, trim, engine and other specifications. It first appeared in our advert records today. According to the government's MOT record, its advertised mileage is consistent with the latest test. The seller is Sytner Group Nottingham Audi, based in Nottingham. How to contact the dealer and its opening hours are on this AskCar page.

Stock data as of 10 November 2026.

How we estimate prices and check cars

Price

Fair price: £371 (1%) over the AskCar estimate of £20,629.

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 6,629 priced Audi A3 adverts across different ages and specifications, as of 10 November 2026.

A 2021 Audi A3 with the 1.5 petrol engine is typically advertised at £17,800: the median of the 186 for sale on AskCar, as of 10 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: 459 of the 812 first advertised between 11 July 2026 and 7 October 2026.

Price history

AskCar first saw this advert on 10 November 2026 at £21,000. 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 10 November 2026: valid until 14 October 2027.

It has had 3 MOTs. The latest, on 14 October 2026, passed.

Advisories at the latest test: nearside rear tyre slightly damaged/cracking or perishing; offside rear tyre slightly damaged/cracking or perishing.

Mileage at that test: 12,435 miles, which matches the advertised 13,434 miles.

Advertised mileage is about 30,100 miles lower than the median mileage of a 2021 Audi A3 on AskCar.

Similar cars

54 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 10 November 2026.

The 3 closest to this car in mileage:

• 2021 Audi A3 S Line, 1.5 petrol hatchback, blue. Mileage: 16,057 miles. Price: £19,977, £1,023 less than this car. Dealer: CarSupermarket.com Barnsley in Barnsley. AskCar page: https://askcar.co.uk/car/audi-a3-2021-f1f7270054ea
• 2021 Audi A3 S Line, 1.5 petrol hatchback, grey. Mileage: 18,150 miles. Price: £20,300, £700 less than this car. Dealer: ZG Prestige in Bolton. AskCar page: https://askcar.co.uk/car/audi-a3-2021-42afac1d3832
• 2021 Audi A3 S Line, 1.5 petrol hatchback, grey. Mileage: 18,246 miles. Price: £18,499, £2,501 less than this car. Dealer: Days Motorpark in Swansea. AskCar page: https://askcar.co.uk/car/audi-a3-2021-d4b7e7eb277e

• The nearest: 2021 Audi A3 S Line, 1.5 petrol hatchback, grey, under a mile from this car. Mileage: 42,342 miles. Price: £19,500, £1,500 less than this car. Dealer: Sytner Group Nottingham Audi in Nottingham. AskCar page: https://askcar.co.uk/car/audi-a3-2021-53d1a219332d