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: 30,281 miles
• Fuel: Petrol
• Body: Hatchback, 5 doors, 5 seats
• Engine: 1.5 litres, 148 bhp
• Gearbox: Manual
• Drive: Front-wheel drive
• Colour: White
• CO2: 136 g/km
• Emissions standard: Euro 6, ULEZ compliant

About this car

With 30,281 miles on the clock, this 2021 Audi A3 S Line has done roughly 13,300 fewer miles than a typical 2021 Audi A3. Its asking price of £16,995 is £689 below the AskCar estimate of £17,684. To work out the AskCar estimate, we analyse UK dealer adverts for 6,542 Audi A3 cars across different ages and specifications. It first appeared in our advert records 13 days ago. According to the government's MOT record, its advertised mileage is consistent with the latest test. The seller is Sycamore Stamford, based in Stamford. 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: £689 (3%) under the AskCar estimate of £17,684.

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 13 days.

Price history

AskCar first saw this advert on 20 October 2026 at £16,995. 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 9 August 2027.

It has had 3 MOTs. The latest, on 10 August 2026, passed.

There were no advisories at the latest test.

Mileage at that test: 29,810 miles, which matches the advertised 30,281 miles.

Advertised mileage is about 13,300 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, white. Mileage: 30,408 miles. Price: £18,490, £1,495 more than this car. Dealer: Harwoods Southampton Audi in Southampton. AskCar page: https://askcar.co.uk/car/audi-a3-2021-f4f13ee81afb
• 2021 Audi A3 S Line, 1.5 petrol hatchback, black. Mileage: 26,584 miles. Price: £17,799, £804 more 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, grey. Mileage: 26,224 miles. Price: £17,670, £675 more 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

• The nearest: 2021 Audi A3 S Line, 1.5 petrol hatchback, white, 13 miles from this car. Mileage: 36,065 miles. Price: £15,990, £1,005 less than this car. Dealer: Carworld Car Supermarket in Peterborough. AskCar page: https://askcar.co.uk/car/audi-a3-2021-8262eb5d5772