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: 51,829 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 51,829 miles on the clock, this 2021 Audi A3 S Line has done roughly 8,300 more miles than a typical 2021 Audi A3. The dealer is asking £16,900, which is £166 below the AskCar estimate of £17,066. To work out the AskCar estimate, we analyse UK dealer adverts for 6,705 Audi A3 cars across different ages and specifications. We first recorded this car for sale 1 day ago. According to the government's MOT record, its advertised mileage is consistent with the latest test. The seller is Sytner Select Wakefield, based in Wakefield. How to contact the dealer and its opening hours are on this AskCar page.

Stock data as of 12 November 2026.

How we estimate prices and check cars

Price

Fair price: £166 (under 1%) under the AskCar estimate of £17,066.

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 6,705 priced Audi A3 adverts across different ages and specifications, as of 12 November 2026.

A 2021 Audi A3 with the 1.5 petrol engine is typically advertised at £17,700: the median of the 191 for sale on AskCar, as of 12 November 2026.

Time on sale

AskCar first saw this 2021 Audi A3 advertised 1 day ago. About 6 in 10 of 2021 Audi A3 cars are gone from sale within a month of being advertised: 465 of the 830 first advertised between 12 July 2026 and 9 October 2026.

Price history

AskCar first saw this advert on 11 November 2026 at £16,900. 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 12 November 2026: valid until 20 April 2027.

It has had 3 MOTs. The latest, on 13 April 2026, passed.

Advisories at the latest test: windscreen damaged but not adversely affecting driver's view.

Mileage at that test: 46,916 miles, which matches the advertised 51,829 miles.

Advertised mileage is about 8,300 miles higher than the median mileage of a 2021 Audi A3 on AskCar.

Similar cars

57 other 2021 Audi A3 S Line 1.5 petrol automatic hatchbacks are for sale at UK dealers, from £11,495 to £21,995, as of 12 November 2026.

The 3 closest to this car in mileage:

• 2021 Audi A3 S Line, 1.5 petrol hatchback, white. Mileage: 51,736 miles. Price: £18,999, £2,099 more than this car. Dealer: Hawco Group in Aberdeen. AskCar page: https://askcar.co.uk/car/audi-a3-2021-045671486692
• 2021 Audi A3 S Line, 1.5 petrol hatchback, grey. Mileage: 51,550 miles. Price: £17,300, £400 more than this car. Dealer: ZG Prestige in Bolton. AskCar page: https://askcar.co.uk/car/audi-a3-2021-f0c44cb3a408
• 2021 Audi A3 S Line, 1.5 petrol hatchback, grey. Mileage: 52,428 miles. Price: £17,495, £595 more than this car. Dealer: Shakespeare Street Garage in Lincoln. AskCar page: https://askcar.co.uk/car/audi-a3-2021-019e381a240d

• The nearest: 2021 Audi A3 S Line, 1.5 petrol hatchback, blue, 11 miles from this car. Mileage: 16,057 miles. Price: £19,977, £3,077 more than this car. Dealer: CarSupermarket.com Barnsley in Barnsley. AskCar page: https://askcar.co.uk/car/audi-a3-2021-f1f7270054ea