2021 Audi A3 1.5 TFSI S Line

Overview

• Make: Audi
• Model: A3
• Trim: S Line
• Version: 1.5 TFSI 35 S Line Manual FWD Euro 6 (s/s) 5dr Sportback (148 bhp)
• Year: 2021
• Mileage: 22,500 miles
• Fuel: Petrol
• Body: Hatchback, 5 doors, 5 seats
• Engine: 1.5 litres, 148 bhp
• Gearbox: Manual
• Drive: Front-wheel drive
• Colour: Blue
• CO2: 136 g/km
• Emissions standard: Euro 6, ULEZ compliant

About this car

This 2021 Audi A3 S Line is advertised with 22,500 miles, approximately 21,100 below the typical mileage for its age. Its asking price of £18,350 is £56 above the AskCar estimate of £18,294. The AskCar estimate draws on 6,542 Audi A3 adverts across the UK, adjusting for age, mileage, trim, engine and other specifications. This car was first seen in our listings data 17 days ago. According to the government's MOT record, its advertised mileage is consistent with the latest test. The seller is Keith Motors Verwood, based in Verwood. 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: £56 (under 1%) over the AskCar estimate of £18,294.

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 17 days.

Price history

AskCar first saw this advert on 16 October 2026 at £18,350. 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 24 March 2027.

It has had 3 MOTs. The latest, on 16 March 2026, passed.

There were no advisories at the latest test.

Mileage at that test: 19,699 miles, which matches the advertised 22,500 miles.

Advertised mileage is about 21,100 miles lower than the median mileage of a 2021 Audi A3 on AskCar.

Similar cars

20 other 2021 Audi A3 S Line 1.5 petrol manual hatchbacks are for sale at UK dealers, from £12,895 to £18,490, as of 2 November 2026.

The 3 closest to this car in mileage:

• 2021 Audi A3 S Line, 1.5 petrol hatchback, grey. Mileage: 26,224 miles. Price: £17,670, £680 less than this car. Dealer: Big Motoring World Blue Bell Hill in Blue Bell Hill. AskCar page: https://askcar.co.uk/car/audi-a3-2021-3d5ebf92bd6d
• 2021 Audi A3 S Line, 1.5 petrol hatchback, black. Mileage: 26,584 miles. Price: £17,799, £551 less than this car. Dealer: cinch Corby in Corby. AskCar page: https://askcar.co.uk/car/audi-a3-2021-e9e074192c98
• 2021 Audi A3 S Line, 1.5 petrol hatchback, white. Mileage: 30,281 miles. Price: £16,995, £1,355 less than this car. Dealer: Sycamore Stamford in Stamford. AskCar page: https://askcar.co.uk/car/audi-a3-2021-95bc1d4fec91

• The nearest: 2021 Audi A3 S Line, 1.5 petrol hatchback, white, 22 miles from this car. Mileage: 30,408 miles. Price: £18,490, £140 more than this car. Dealer: Harwoods Southampton Audi in Southampton. AskCar page: https://askcar.co.uk/car/audi-a3-2021-f4f13ee81afb