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: 40,663 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: White
• CO2: 135 g/km
• Emissions standard: Euro 6, ULEZ compliant

About this car

With 40,663 miles on the clock, this 2021 Audi A3 S Line has done roughly 2,900 fewer miles than a typical 2021 Audi A3. Priced at £19,014, it is advertised £610 above the AskCar estimate of £18,404. The AskCar estimate uses UK dealer asking prices, including 6,542 Audi A3 adverts, and accounts for the car’s age, mileage and specification. We first recorded this car for sale 24 days ago. Its advertised mileage matches the government's MOT record. It is for sale at Lookers Audi Wearside in Sunderland. 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: £610 (3%) over the AskCar estimate of £18,404.

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 £18,908. Its asking price is now £19,014, £106 more.

Price changes recorded:

• 9 October 2026: £18,908
• 13 October 2026: £19,182
• 20 October 2026: £18,948
• 29 October 2026: £19,014

Mileage and MOT

MOT, from the government's MOT records (DVSA, the Driver and Vehicle Standards Agency), as of 2 November 2026: valid until 11 August 2027.

It has had 3 MOTs. The latest, on 5 August 2026, passed.

There were no advisories at the latest test.

Mileage at that test: 39,921 miles, which matches the advertised 40,663 miles.

Advertised mileage is about 2,900 miles lower than the median mileage of a 2021 Audi A3 on AskCar.

Similar cars

49 other 2021 Audi A3 S Line 1.5 petrol automatic hatchbacks are for sale at UK dealers, from £11,990 to £21,995, as of 2 November 2026.

The 3 closest to this car in mileage:

• 2021 Audi A3 S Line, 1.5 petrol hatchback, black. Mileage: 40,655 miles. Price: £17,995, £1,019 less than this car. Dealer: Taunton Road Car Centre in Bridgwater. AskCar page: https://askcar.co.uk/car/audi-a3-2021-45aef62331d2
• 2021 Audi A3 S Line, 1.5 petrol hatchback, blue. Mileage: 41,000 miles. Price: £18,995, the same price as this car. Dealer: Grampian Cars in Macduff. AskCar page: https://askcar.co.uk/car/audi-a3-2021-ff4ecb3467fe
• 2021 Audi A3 S Line, 1.5 petrol hatchback, grey. Mileage: 41,270 miles. Price: £17,507, £1,507 less than this car. Dealer: Cargem in Rainham. AskCar page: https://askcar.co.uk/car/audi-a3-2021-43f7591315bd

• The nearest: 2021 Audi A3 S Line, 1.5 petrol hatchback, red, 8 miles from this car. Mileage: 28,344 miles. Price: £19,649, £635 more than this car. Dealer: Lookers Audi Tyneside in Tynemouth. AskCar page: https://askcar.co.uk/car/audi-a3-2021-ce1fdd996dd2