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: 31,894 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

With 31,894 miles on the clock, this 2021 Audi A3 S Line has done roughly 11,700 fewer miles than a typical 2021 Audi A3. The AskCar estimate for this car is £19,291. It is priced at £20,750, which is £1,459 above that estimate. The AskCar estimate uses UK dealer asking prices, including 6,542 Audi A3 adverts, and accounts for the car’s age, mileage and specification. This car was first seen in our listings data 9 days ago. We checked its advertised mileage against the government's MOT record, and they match. The seller is Sytner Group Leicester Audi, based in Leicester. How to contact the dealer and its opening hours are on this AskCar page.

Stock data as of 2 November 2026.

How we estimate prices and check cars

Price

Fair price: £1,459 (7%) over the AskCar estimate of £19,291.

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 6,542 priced Audi A3 adverts across different ages and specifications, as of 2 November 2026.

A 2021 Audi A3 with the 1.5 petrol engine is typically advertised at £18,000: the median of the 191 for sale on AskCar, as of 2 November 2026.

Time on sale

This 2021 Audi A3 has been on sale for at least 9 days.

Price history

AskCar first saw this advert on 24 October 2026 at £20,750. 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 2 November 2026: valid until 18 May 2027.

It has had 3 MOTs. The latest, on 15 May 2026, passed.

Advisories at the latest test: offside front inner tyre worn close to legal limit/worn on edge.

Mileage at that test: 29,448 miles, which matches the advertised 31,894 miles.

Advertised mileage is about 11,700 miles lower than the median mileage of a 2021 Audi A3 on AskCar.

Similar cars

49 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 2 November 2026.

The 3 closest to this car in mileage:

• 2021 Audi A3 S Line, 1.5 petrol hatchback, red. Mileage: 31,821 miles. Price: £19,299, £1,451 less than this car. Dealer: cinch Corby in Corby. AskCar page: https://askcar.co.uk/car/audi-a3-2021-fef5a492f628
• 2021 Audi A3 S Line, 1.5 petrol hatchback, white. Mileage: 32,000 miles. Price: £17,880, £2,870 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: 32,574 miles. Price: £20,330, £420 less than this car. Dealer: Prestige Cars Of Essex in Harlow. AskCar page: https://askcar.co.uk/car/audi-a3-2021-86742b42df02

• The nearest: 2021 Audi A3 S Line, 1.5 petrol hatchback, white, 11 miles from this car. Mileage: 120,530 miles. Price: £11,995, £8,755 less than this car. Dealer: V12 Sports & Classics Ltd - Hinckley in Hinckley. AskCar page: https://askcar.co.uk/car/audi-a3-2021-b258977de54b