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: 32,600 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 is advertised with 32,600 miles, approximately 10,600 below the typical mileage for its age. Its asking price of £18,800 is £309 below the AskCar estimate of £19,109. 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 141 days, and its asking price is down £695. We checked its advertised mileage against the government's MOT record, and they match. The seller is ZG Prestige, based in Bolton. 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: £309 (1%) under the AskCar estimate of £19,109.

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 141 days, and its asking price has been cut by £695. 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 16 June 2026 at £19,495. Its asking price is now £18,800, £695 less. The latest price cut was seen on 3 November 2026.

Price changes recorded:

• 17 June 2026: £19,495
• 15 September 2026: £19,250
• 28 September 2026: £18,995
• 3 November 2026: £18,800

Mileage and MOT

MOT, from the government's MOT records (DVSA, the Driver and Vehicle Standards Agency), as of 4 November 2026: valid until 28 April 2027.

It has had 3 MOTs. The latest, on 29 April 2026, passed.

There were no advisories at the latest test.

Mileage at that test: 32,030 miles, which matches the advertised 32,600 miles.

Advertised mileage is about 10,600 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 £11,990 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, grey. Mileage: 32,574 miles. Price: £20,330, £1,530 more than this car. Dealer: Prestige Cars Of Essex in Harlow. AskCar page: https://askcar.co.uk/car/audi-a3-2021-86742b42df02
• 2021 Audi A3 S Line, 1.5 petrol hatchback, white. Mileage: 32,000 miles. Price: £17,880, £920 less than this car. Dealer: Wembley Prestige Cars in Watford. AskCar page: https://askcar.co.uk/car/audi-a3-2021-80778e445c31
• 2021 Audi A3 S Line, 1.5 petrol hatchback, grey. Mileage: 33,239 miles. Price: £18,290, £510 less than this car. Dealer: Cars2 in Wakefield. AskCar page: https://askcar.co.uk/car/audi-a3-2021-0d607e163a87

• The nearest: 2021 Audi A3 S Line, 1.5 petrol hatchback, grey, under a mile from this car. Mileage: 18,150 miles. Price: £20,300, £1,500 more than this car. Dealer: ZG Prestige in Bolton. AskCar page: https://askcar.co.uk/car/audi-a3-2021-42afac1d3832