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) 4dr (148 bhp)
• Year: 2021
• Mileage: 29,030 miles
• Fuel: Petrol, mild hybrid
• Body: Saloon, 4 doors, 5 seats
• Engine: 1.5 litres, 148 bhp
• Gearbox: Automatic (S tronic)
• Drive: Front-wheel drive
• Colour: Grey
• CO2: 131 g/km
• Emissions standard: Euro 6, ULEZ compliant

About this car

At 29,030 miles, this 2021 Audi A3 S Line has covered about 13,300 fewer miles than other 2021 Audi A3 cars. Priced at £18,695, it is advertised £768 below the AskCar estimate of £19,463. The AskCar estimate draws on 6,729 Audi A3 adverts across the UK, adjusting for age, mileage, trim, engine and other specifications. Since we first spotted the advert 6 days ago, the asking price has dropped by £200. We checked its advertised mileage against the government's MOT record, and they match. The seller is V12 Sports & Classics Ltd -Worksop, based in Worksop. How to contact the dealer and its opening hours are on this AskCar page.

Stock data as of 6 November 2026.

How we estimate prices and check cars

Price

Fair price: £768 (3%) under the AskCar estimate of £19,463.

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 6,729 priced Audi A3 adverts across different ages and specifications, as of 6 November 2026.

A 2021 Audi A3 with the 1.5 petrol engine is typically advertised at £18,000: the median of the 200 for sale on AskCar, as of 6 November 2026.

Time on sale

AskCar first saw this 2021 Audi A3 advertised 6 days ago. About 6 in 10 of 2021 Audi A3 cars are gone from sale within a month of being advertised: 433 of the 772 first advertised between 7 July 2026 and 3 October 2026.

Price history

AskCar first saw this advert on 31 October 2026 at £18,895. Its asking price is now £18,695, £200 less. The latest price cut was seen on 5 November 2026.

Price changes recorded:

• 31 October 2026: £18,895
• 5 November 2026: £18,695

Mileage and MOT

MOT, from the government's MOT records (DVSA, the Driver and Vehicle Standards Agency), as of 6 November 2026: valid until 22 March 2027.

It has had 3 MOTs. The latest, on 19 March 2026, passed.

There were no advisories at the latest test.

Mileage at that test: 28,461 miles, which matches the advertised 29,030 miles.

Advertised mileage is about 13,300 miles lower than the median mileage of a 2021 Audi A3 on AskCar.

Similar cars

29 other 2021 Audi A3 S Line 1.5 petrol automatic saloons are for sale at UK dealers, from £11,995 to £20,995, as of 6 November 2026.

The 3 closest to this car in mileage:

• 2021 Audi A3 S Line, 1.5 petrol saloon, grey. Mileage: 30,115 miles. Price: £18,300, £395 less than this car. Dealer: JCT600 Volkswagen Sheffield in Sheffield. AskCar page: https://askcar.co.uk/car/audi-a3-2021-9772e08d59f4
• 2021 Audi A3 S Line, 1.5 petrol saloon, grey. Mileage: 27,791 miles. Price: £18,999, £304 more than this car. Dealer: HPL Preston in Preston. AskCar page: https://askcar.co.uk/car/audi-a3-2021-bf90a185cea2
• 2021 Audi A3 S Line, 1.5 petrol saloon, black. Mileage: 31,587 miles. Price: £20,950, £2,255 more than this car. Dealer: Group 1 Automotive Chingford Audi in Chingford. AskCar page: https://askcar.co.uk/car/audi-a3-2021-6c4c89e0748f