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: 41,270 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: Grey
• CO2: 135 g/km
• Emissions standard: Euro 6, ULEZ compliant

About this car

With 41,270 miles on the clock, this 2021 Audi A3 S Line has done roughly 2,300 fewer miles than a typical 2021 Audi A3. Priced at £17,507, it is advertised £837 below the AskCar estimate of £18,344. To work out the AskCar estimate, we analyse UK dealer adverts for 6,542 Audi A3 cars across different ages and specifications. Since we first spotted the advert 18 days ago, the asking price has dropped by £766. Its advertised mileage matches the government's MOT record. You can find this car at Cargem in Rainham. 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: £837 (4%) under the AskCar estimate of £18,344.

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 18 days.

Price history

AskCar first saw this advert on 15 October 2026 at £18,273. Its asking price is now £17,507, £766 less. The latest price cut was seen on 16 October 2026.

Price changes recorded:

• 15 October 2026: £18,273
• 16 October 2026: £17,507

Mileage and MOT

MOT, from the government's MOT records (DVSA, the Driver and Vehicle Standards Agency), as of 2 November 2026: valid until 27 February 2027.

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

Advisories at the latest test: windscreen damaged but not adversely affecting driver's view; front brake disc worn, but not excessively lipped.

Mileage at that test: 39,969 miles, which matches the advertised 41,270 miles.

Advertised mileage is about 2,300 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, blue. Mileage: 41,000 miles. Price: £18,995, £1,488 more than 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, white. Mileage: 40,663 miles. Price: £19,014, £1,507 more than this car. Dealer: Lookers Audi Wearside in Sunderland. AskCar page: https://askcar.co.uk/car/audi-a3-2021-26c3e7fac143
• 2021 Audi A3 S Line, 1.5 petrol hatchback, black. Mileage: 40,655 miles. Price: £17,995, £488 more than this car. Dealer: Taunton Road Car Centre in Bridgwater. AskCar page: https://askcar.co.uk/car/audi-a3-2021-45aef62331d2

• The nearest: 2021 Audi A3 S Line, 1.5 petrol hatchback, white, 4 miles from this car. Mileage: 35,618 miles. Price: £17,500, the same price as this car. Dealer: A13 Cars in Barking. AskCar page: https://askcar.co.uk/car/audi-a3-2021-45637b81b706