2021 Audi A3 1.4 TFSIe S Line

Overview

• Make: Audi
• Model: A3
• Trim: S Line
• Version: 1.4 S Line S tronic FWD Euro 6 5dr
• Year: 2021
• Mileage: 21,000 miles
• Fuel: Plug-in hybrid (petrol)
• Body: Hatchback, 5 doors, 5 seats
• Engine: 1.4 litres
• 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 21,000 miles on the clock. The AskCar estimate for this car is £20,028. It is priced at £20,990, which is £962 above that estimate. The AskCar estimate draws on 6,542 Audi A3 adverts across the UK, adjusting for age, mileage, trim, engine and other specifications. We have tracked this advert for 124 days. The advertised mileage is lower than the latest MOT reading of 28,305 miles. Ask the dealer to explain. MOT records show an expiry date of 11 February 2027. It is for sale at Car Sales in New Malden. 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: £962 (4%) over the AskCar estimate of £20,028.

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 124 days.

Price history

AskCar first saw this advert on 1 July 2026 at £20,990. 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 2 November 2026: valid until 11 February 2027.

It has had 3 MOTs. The latest, on 12 February 2026, passed.

There were no advisories at the latest test.

Mileage at that test: 28,305 miles. The advert says 21,000 miles, fewer than the MOT record, so ask the dealer which is right.

Advertised mileage is about 22,600 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 £19,499, as of 2 November 2026.

The 3 closest to this car in mileage:

• 2021 Audi A3 S Line, 1.4 plug-in hybrid hatchback, blue. Mileage: 21,341 miles. Price: £17,842, £3,148 less than this car. Dealer: Carbase Bristol in Bristol. AskCar page: https://askcar.co.uk/car/audi-a3-2021-e48aecdc86db
• 2021 Audi A3 S Line, 1.4 plug-in hybrid hatchback, white. Mileage: 19,757 miles. Price: £17,750, £3,240 less than this car. Dealer: Hilton Car Supermarket Milton Keynes in Milton Keynes. AskCar page: https://askcar.co.uk/car/audi-a3-2021-e2ffd8a67985
• 2021 Audi A3 S Line, 1.4 plug-in hybrid hatchback, black. Mileage: 22,863 miles. Price: £18,998, £1,992 less than this car. Dealer: Arnold Clark Hillington Renault / Dacia / Alpine / Vanstore in Hillington. AskCar page: https://askcar.co.uk/car/audi-a3-2021-a1373be6b2f0

• The nearest: 2021 Audi A3 S Line, 1.4 plug-in hybrid hatchback, black, under a mile from this car. Mileage: 68,490 miles. Price: £13,990, £7,000 less than this car. Dealer: K Motors London in New Malden. AskCar page: https://askcar.co.uk/car/audi-a3-2021-0c9095743e9c