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: 39,502 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: Blue
• CO2: 131 g/km
• Emissions standard: Euro 6, ULEZ compliant

About this car

This 2021 Audi A3 S Line has covered 39,502 miles, around 4,100 fewer miles than is typical for its age. Its asking price of £18,049 is £535 below the AskCar estimate of £18,584. The AskCar estimate uses 6,542 UK dealer adverts for the Audi A3, with adjustments for age, mileage, trim, engine and other specifications. We first recorded this advert 24 days ago, and its asking price has since fallen by £400. According to the government's MOT record, its advertised mileage is consistent with the latest test. The seller is Motorpoint Newport, based in Newport. 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: £535 (2%) under the AskCar estimate of £18,584.

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 24 days.

Price history

AskCar first saw this advert on 9 October 2026 at £18,449. Its asking price is now £18,049, £400 less. The latest price cut was seen on 27 October 2026.

Price changes recorded:

• 9 October 2026: £18,449
• 16 October 2026: £18,099
• 20 October 2026: £18,149
• 27 October 2026: £18,049

Mileage and MOT

MOT, from the government's MOT records (DVSA, the Driver and Vehicle Standards Agency), as of 2 November 2026: valid until 8 September 2027.

It has had 3 MOTs. The latest, on 21 August 2026, passed.

Advisories at the latest test: front brake disc worn, pitted or scored, but not seriously weakened.

Mileage at that test: 38,915 miles, which matches the advertised 39,502 miles.

Advertised mileage is about 4,100 miles lower 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, black. Mileage: 39,000 miles. Price: £20,995, £2,946 more than this car. Dealer: Prestigio Motor Company in Watford. AskCar page: https://askcar.co.uk/car/audi-a3-2021-1a321b81a2e4
• 2021 Audi A3 S Line, 1.5 petrol saloon, black. Mileage: 40,772 miles. Price: £16,370, £1,679 less than this car. Dealer: Hilton Garage in Derby. AskCar page: https://askcar.co.uk/car/audi-a3-2021-8cea3620043c
• 2021 Audi A3 S Line, 1.5 petrol saloon, grey. Mileage: 41,000 miles. Price: £18,595, £546 more than this car. Dealer: T & S Elite Cars in Kingston upon Hull. AskCar page: https://askcar.co.uk/car/audi-a3-2021-3efd6aa0f4e5

• The nearest: 2021 Audi A3 S Line, 1.5 petrol saloon, yellow, 23 miles from this car. Mileage: 60,108 miles. Price: £16,499, £1,550 less than this car. Dealer: Empressive Motor Company in Merthyr Tydfil. AskCar page: https://askcar.co.uk/car/audi-a3-2021-dfed1226c57c