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: 28,922 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: White
• CO2: 135 g/km
• Emissions standard: Euro 6, ULEZ compliant

About this car

At 28,922 miles, this 2021 Audi A3 S Line has covered about 14,700 fewer miles than other 2021 Audi A3 cars. The AskCar estimate for this car is £19,579. It is priced at £19,380, which is £199 below that estimate. To work out the AskCar estimate, we analyse UK dealer adverts for 6,542 Audi A3 cars across different ages and specifications. We first saw this car advertised 19 days ago. Its asking price has since fallen by £80. According to the government's MOT record, its advertised mileage is consistent with the latest test. The seller is Big Motoring World Blue Bell Hill, based in Chatham. 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: £199 (1%) under the AskCar estimate of £19,579.

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 19 days.

Price history

AskCar first saw this advert on 14 October 2026 at £19,460. Its asking price is now £19,380, £80 less. The latest price cut was seen on 28 October 2026.

Price changes recorded:

• 14 October 2026: £19,460
• 16 October 2026: £19,450
• 18 October 2026: £19,430
• 19 October 2026: £19,410
• 21 October 2026: £19,430
• 22 October 2026: £19,230
• 23 October 2026: £19,210
• 24 October 2026: £19,390
• 25 October 2026: £19,370
• 27 October 2026: £19,390
• 28 October 2026: £19,380

Mileage and MOT

MOT, from the government's MOT records (DVSA, the Driver and Vehicle Standards Agency), as of 2 November 2026: valid until 8 November 2026.

It has had 2 MOTs. The latest, on 7 November 2025, passed.

Advisories at the latest test: front shock absorbers has light misting of oil.

Mileage at that test: 24,877 miles, which matches the advertised 28,922 miles.

Advertised mileage is about 14,700 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, black. Mileage: 29,145 miles. Price: £19,578, £198 more than this car. Dealer: Lookers Audi Guildford in Guildford. AskCar page: https://askcar.co.uk/car/audi-a3-2021-6fff69d3d17b
• 2021 Audi A3 S Line, 1.5 petrol hatchback, red. Mileage: 28,344 miles. Price: £19,649, £269 more than this car. Dealer: Lookers Audi Tyneside in Tynemouth. AskCar page: https://askcar.co.uk/car/audi-a3-2021-ce1fdd996dd2
• 2021 Audi A3 S Line, 1.5 petrol hatchback, white. Mileage: 27,272 miles. Price: £19,200, £180 less than this car. Dealer: Big Motoring World Blue Bell Hill in Blue Bell Hill. AskCar page: https://askcar.co.uk/car/audi-a3-2021-9265373a4648