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: 21,341 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: Blue
• CO2: 29 g/km
• Emissions standard: Euro 6, ULEZ compliant

About this car

This 2021 Audi A3 S Line is advertised with 21,341 miles, approximately 22,300 below the typical mileage for its age. The dealer is asking £17,842, which is £1,425 below the AskCar estimate of £19,267. 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 19 days ago, the asking price has dropped by £158. According to the government's MOT record, its advertised mileage is consistent with the latest test. The seller is Carbase Bristol, based in Bristol. 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: £1,425 (7%) under the AskCar estimate of £19,267.

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 19 days.

Price history

AskCar first saw this advert on 14 October 2026 at £18,000. Its asking price is now £17,842, £158 less. The latest price cut was seen on 31 October 2026.

Price changes recorded:

• 14 October 2026: £18,000
• 27 October 2026: £17,856
• 31 October 2026: £17,842

Mileage and MOT

MOT, from the government's MOT records (DVSA, the Driver and Vehicle Standards Agency), as of 2 November 2026: valid until 17 February 2027.

It has had 3 MOTs. The latest, on 18 February 2026, passed.

Advisories at the latest test: under trays and covers fitted obscuring some items.

Mileage at that test: 19,659 miles, which matches the advertised 21,341 miles.

Advertised mileage is about 22,300 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, white. Mileage: 21,000 miles. Price: £20,990, £3,148 more than this car. Dealer: Car Sales in New Malden. AskCar page: https://askcar.co.uk/car/audi-a3-2021-8254f3fd95df
• 2021 Audi A3 S Line, 1.4 plug-in hybrid hatchback, black. Mileage: 22,863 miles. Price: £18,998, £1,156 more than this car. Dealer: Arnold Clark Hillington Renault / Dacia / Alpine / Vanstore in Hillington. AskCar page: https://askcar.co.uk/car/audi-a3-2021-a1373be6b2f0
• 2021 Audi A3 S Line, 1.4 plug-in hybrid hatchback, white. Mileage: 19,757 miles. Price: £17,750, £92 less than this car. Dealer: Hilton Car Supermarket Milton Keynes in Milton Keynes. AskCar page: https://askcar.co.uk/car/audi-a3-2021-e2ffd8a67985

• The nearest: 2021 Audi A3 S Line, 1.4 plug-in hybrid hatchback, black, 56 miles from this car. Mileage: 51,374 miles. Price: £15,900, £1,942 less than this car. Dealer: Yeovil Audi in Poole. AskCar page: https://askcar.co.uk/car/audi-a3-2021-226e58e2635e