2021 Audi A3 1.4 TFSIe S Line

Overview

• Make: Audi
• Model: A3
• Trim: S Line
• Version: 1.4 13kWh TFSIe 40 S Line S tronic FWD Euro 6 (s/s) 5dr Sportback (201 bhp)
• Year: 2021
• Mileage: 31,480 miles
• Fuel: Plug-in hybrid (petrol)
• Body: Hatchback, 5 doors, 5 seats
• Engine: 1.4 litres, 201 bhp
• Gearbox: Automatic (S tronic)
• Drive: Front-wheel drive
• Colour: White
• CO2: 29 g/km
• Emissions standard: Euro 6, ULEZ compliant

About this car

This 2021 Audi A3 S Line is advertised with 31,480 miles, approximately 10,900 below the typical mileage for its age. The dealer is asking £16,998, which is £1,170 below the AskCar estimate of £18,168. To work out the AskCar estimate, we analyse UK dealer adverts for 6,691 Audi A3 cars across different ages and specifications. We have tracked this advert today. According to the government's MOT record, its advertised mileage is consistent with the latest test. You can find this car at BTS Cars in Derby. How to contact the dealer and its opening hours are on this AskCar page.

Stock data as of 7 November 2026.

How we estimate prices and check cars

Price

Fair price: £1,170 (6%) under the AskCar estimate of £18,168.

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 6,691 priced Audi A3 adverts across different ages and specifications, as of 7 November 2026.

A 2021 Audi A3 with the 1.4 plug-in hybrid engine is typically advertised at £16,000: the median of the 81 for sale on AskCar, as of 7 November 2026.

Time on sale

AskCar first saw this 2021 Audi A3 advertised today. About 6 in 10 of 2021 Audi A3 cars are gone from sale within a month of being advertised: 440 of the 781 first advertised between 7 July 2026 and 4 October 2026.

Price history

AskCar first saw this advert on 7 November 2026 at £16,998. 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 7 November 2026: valid until 20 December 2026.

It has had 2 MOTs. The latest, on 19 December 2025, passed.

There were no advisories at the latest test.

Mileage at that test: 25,453 miles, which matches the advertised 31,480 miles.

Advertised mileage is about 10,900 miles lower than the median mileage of a 2021 Audi A3 on AskCar.

Similar cars

42 other 2021 Audi A3 S Line 1.4 plug-in hybrid automatic hatchbacks are for sale at UK dealers, from £11,400 to £21,995, as of 7 November 2026.

The 3 closest to this car in mileage:

• 2021 Audi A3 S Line, 1.4 plug-in hybrid hatchback, black. Mileage: 30,252 miles. Price: £18,290, £1,292 more than this car. Dealer: Sinclair Audi Approved Neyland in Neyland. AskCar page: https://askcar.co.uk/car/audi-a3-2021-d9bd29995a53
• 2021 Audi A3 S Line, 1.4 plug-in hybrid hatchback, black. Mileage: 28,996 miles. Price: £18,395, £1,397 more than this car. Dealer: Alan Macdonald Cars in Larbert. AskCar page: https://askcar.co.uk/car/audi-a3-2021-8e28cb2f9edd
• 2021 Audi A3 S Line, 1.4 plug-in hybrid hatchback, white. Mileage: 28,832 miles. Price: £19,499, £2,501 more than this car. Dealer: Hawco Group in Aberdeen. AskCar page: https://askcar.co.uk/car/audi-a3-2021-bcc22a4d6b55

• The nearest: 2021 Audi A3 S Line, 1.4 plug-in hybrid hatchback, black, under a mile from this car. Mileage: 47,612 miles. Price: £15,198, £1,800 less than this car. Dealer: BTS Cars in Derby. AskCar page: https://askcar.co.uk/car/audi-a3-2021-04d100abc3c3