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: 36,700 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: Black
• CO2: 29 g/km
• Emissions standard: Euro 6, ULEZ compliant

About this car

This 2021 Audi A3 S Line is advertised with 36,700 miles, approximately 6,900 below the typical mileage for its age. Its asking price of £16,490 is £1,415 below the AskCar estimate of £17,905. The AskCar estimate uses 6,542 UK dealer adverts for the Audi A3, with adjustments for age, mileage, trim, engine and other specifications. This car was first seen in our listings data 23 days ago. Our latest MOT record expired on 16 May 2026. Check the current position with the dealer. We checked its advertised mileage against the government's MOT record, and they match. You can find this car at BSB Automotive in Dartford. 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: £1,415 (7%) under the AskCar estimate of £17,905.

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 1.4 plug-in hybrid engine is typically advertised at £15,900: the median of the 77 for sale on AskCar, as of 2 November 2026.

Time on sale

This 2021 Audi A3 has been on sale for at least 23 days.

Price history

AskCar first saw this advert on 10 October 2026 at £16,490. Its asking price has not changed.

Price changes recorded:

• 10 October 2026: £16,490
• 13 October 2026: £16,990
• 19 October 2026: £16,490

Mileage and MOT

MOT, from the government's MOT records (DVSA, the Driver and Vehicle Standards Agency), as of 2 November 2026: the latest record we hold ran out on 16 May 2026; ask the dealer for the current MOT.

It has had 3 MOTs. The latest, on 25 April 2025, passed.

There were no advisories at the latest test.

Mileage at that test: 31,351 miles, which matches the advertised 36,700 miles.

Advertised mileage is about 6,900 miles lower than the median mileage of a 2021 Audi A3 on AskCar.

Similar cars

41 other 2021 Audi A3 S Line 1.4 plug-in hybrid automatic hatchbacks are for sale at UK dealers, from £11,600 to £20,990, as of 2 November 2026.

The 3 closest to this car in mileage:

• 2021 Audi A3 S Line, 1.4 plug-in hybrid hatchback, grey. Mileage: 38,000 miles. Price: £17,250, £760 more than this car. Dealer: David Hayton Autostore Penrith in Penrith. AskCar page: https://askcar.co.uk/car/audi-a3-2021-7652e5b39ab7
• 2021 Audi A3 S Line, 1.4 plug-in hybrid hatchback, grey. Mileage: 38,151 miles. Price: £16,950, £460 more than this car. Dealer: Danson Motors in Sidcup. AskCar page: https://askcar.co.uk/car/audi-a3-2021-51b80b2fa607
• 2021 Audi A3 S Line, 1.4 plug-in hybrid hatchback, blue. Mileage: 39,628 miles. Price: £16,799, £309 more than this car. Dealer: cinch Corby in Corby. AskCar page: https://askcar.co.uk/car/audi-a3-2021-b311307ea622