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) 4dr (148 bhp)
• Year: 2021
• Mileage: 79,653 miles
• Fuel: Petrol, mild hybrid
• Body: Saloon, 4 doors, 5 seats
• Engine: 1.5 litres, 148 bhp
• Gearbox: Automatic (S tronic)
• Drive: Front-wheel drive
• Colour: Grey
• CO2: 131 g/km
• Emissions standard: Euro 6, ULEZ compliant

About this car

With 79,653 miles on the clock, this 2021 Audi A3 S Line has done roughly 36,100 more miles than a typical 2021 Audi A3. Priced at £15,495, it is advertised £1,025 above the AskCar estimate of £14,470. The AskCar estimate draws on 6,542 Audi A3 adverts across the UK, adjusting for age, mileage, trim, engine and other specifications. We have tracked this advert for 46 days. Its advertised mileage matches the government's MOT record. The seller is Motor Link London, based in East HAM. 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: £1,025 (7%) over the AskCar estimate of £14,470.

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 46 days.

Price history

AskCar first saw this advert on 17 September 2026 at £15,495. 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 6 March 2027.

It has had 3 MOTs. The latest, on 24 February 2026, passed.

There were no advisories at the latest test.

Mileage at that test: 73,503 miles, which matches the advertised 79,653 miles.

Advertised mileage is about 36,100 miles higher than the median mileage of a 2021 Audi A3 on AskCar.

Similar cars

31 other 2021 Audi A3 S Line 1.5 petrol automatic saloons are for sale at UK dealers, from £11,995 to £20,995, as of 2 November 2026.

The 3 closest to this car in mileage:

• 2021 Audi A3 S Line, 1.5 petrol saloon, grey. Mileage: 88,000 miles. Price: £14,509, £986 less than this car. Dealer: FM Motor Co in Wembley. AskCar page: https://askcar.co.uk/car/audi-a3-2021-491f3db77418
• 2021 Audi A3 S Line, 1.5 petrol saloon, black. Mileage: 68,520 miles. Price: £15,499, the same price as this car. Dealer: H.P.L. Motors - Oldham (Greater Manchester) in Oldham. AskCar page: https://askcar.co.uk/car/audi-a3-2021-a7df6dd04526
• 2021 Audi A3 S Line, 1.5 petrol saloon, black. Mileage: 63,490 miles. Price: £16,199, £704 more than this car. Dealer: Fords Of Winsford Car Supermarket in Winsford. AskCar page: https://askcar.co.uk/car/audi-a3-2021-39e036594cfa

• The nearest: 2021 Audi A3 S Line, 1.5 petrol saloon, black, 9 miles from this car. Mileage: 31,587 miles. Price: £20,950, £5,455 more than this car. Dealer: Group 1 Automotive Chingford Audi in Chingford. AskCar page: https://askcar.co.uk/car/audi-a3-2021-6c4c89e0748f