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: 57,000 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: Blue
• CO2: 135 g/km
• Emissions standard: Euro 6, ULEZ compliant

About this car

This 2021 Audi A3 S Line has covered 57,000 miles, around 13,800 more miles than is typical for its age. Its asking price of £16,989 is £219 above the AskCar estimate of £16,770. To work out the AskCar estimate, we analyse UK dealer adverts for 6,630 Audi A3 cars across different ages and specifications. The dealer may accept less. This car has been on sale for at least 71 days, and its asking price is down £460. The government's MOT record matches its advertised mileage. It is advertised by Autoworld Norbury ( London) in Streatham. How to contact the dealer and its opening hours are on this AskCar page.

Stock data as of 4 November 2026.

How we estimate prices and check cars

Price

Fair price: £219 (1%) over the AskCar estimate of £16,770.

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 6,630 priced Audi A3 adverts across different ages and specifications, as of 4 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 4 November 2026.

Time on sale

The dealer may accept less. This 2021 Audi A3 has been on sale for at least 71 days, and its asking price has been cut by £460. About 6 in 10 of 2021 Audi A3 cars are gone from sale within a month of being advertised: 419 of the 741 first advertised between 7 July 2026 and 1 October 2026.

Price history

AskCar first saw this advert on 25 August 2026 at £17,449. Its asking price is now £16,989, £460 less. The latest price cut was seen on 30 September 2026.

Price changes recorded:

• 25 August 2026: £17,449
• 27 August 2026: £17,439
• 29 August 2026: £17,389
• 13 September 2026: £17,349
• 17 September 2026: £17,340
• 19 September 2026: £17,249
• 28 September 2026: £16,989
• 29 September 2026: £17,489
• 30 September 2026: £16,989

Mileage and MOT

MOT, from the government's MOT records (DVSA, the Driver and Vehicle Standards Agency), as of 4 November 2026: valid until 5 January 2027.

It has had 3 MOTs. The latest, on 2 January 2026, passed.

Advisories at the latest test: rear tyre worn close to legal limit/worn on edge both 2mm outer tread; offside rear shock absorbers has light misting of oil.

Mileage at that test: 52,952 miles, which matches the advertised 57,000 miles.

Advertised mileage is about 13,800 miles higher 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 £11,990 to £21,995, as of 4 November 2026.

The 3 closest to this car in mileage:

• 2021 Audi A3 S Line, 1.5 petrol hatchback, black. Mileage: 58,857 miles. Price: £16,995, the same price as this car. Dealer: Independent Motor Group in Burnley. AskCar page: https://askcar.co.uk/car/audi-a3-2021-23cd15e99de4
• 2021 Audi A3 S Line, 1.5 petrol hatchback, blue. Mileage: 58,985 miles. Price: £16,400, £589 less than this car. Dealer: Sytner Select Nottingham in Nottingham. AskCar page: https://askcar.co.uk/car/audi-a3-2021-5ed414bf4cce
• 2021 Audi A3 S Line, 1.5 petrol hatchback, black. 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

• The nearest: 2021 Audi A3 S Line, 1.5 petrol hatchback, white, 6 miles from this car. Mileage: 50,500 miles. Price: £16,790, £199 less than this car. Dealer: K Motors London in New Malden. AskCar page: https://askcar.co.uk/car/audi-a3-2021-955301d556ce