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: 30,115 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

This 2021 Audi A3 S Line is advertised with 30,115 miles, approximately 13,500 below the typical mileage for its age. Priced at £18,337, it is advertised £1,208 below the AskCar estimate of £19,545. To work out the AskCar estimate, we analyse UK dealer adverts for 6,542 Audi A3 cars across different ages and specifications. The dealer may accept less: this car has been on sale for at least 102 days. According to the government's MOT record, its advertised mileage is consistent with the latest test. The seller is JCT600 Volkswagen Sheffield, based in Sheffield. 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: £1,208 (6%) under the AskCar estimate of £19,545.

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

The dealer may accept less. This 2021 Audi A3 has been on sale for at least 102 days. About 6 in 10 of 2021 Audi A3 cars are gone from sale within a month of being advertised: 403 of the 709 first advertised between 7 July 2026 and 29 September 2026.

Price history

AskCar first saw this advert on 23 July 2026 at £20,000. Its asking price is now £18,337, £1,663 less.

Price changes recorded:

• 27 July 2026: £20,000
• 11 August 2026: £20,490
• 21 August 2026: £20,250
• 19 September 2026: £19,500
• 23 September 2026: £19,744
• 24 September 2026: £19,699
• 26 September 2026: £19,527
• 10 October 2026: £19,250
• 15 October 2026: £19,000
• 16 October 2026: £19,192
• 20 October 2026: £18,740
• 28 October 2026: £18,337

Mileage and MOT

MOT, from the government's MOT records (DVSA, the Driver and Vehicle Standards Agency), as of 2 November 2026: valid until 30 March 2027.

It has had 3 MOTs. The latest, on 16 March 2026, passed.

There were no advisories at the latest test.

Mileage at that test: 27,602 miles, which matches the advertised 30,115 miles.

Advertised mileage is about 13,500 miles lower than the median mileage of a 2021 Audi A3 on AskCar.

Similar cars

31 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 2 November 2026.

The 3 closest to this car in mileage:

• 2021 Audi A3 S Line, 1.5 petrol saloon, grey. Mileage: 29,030 miles. Price: £18,895, £558 more than this car. Dealer: V12 Sports & Classics Ltd - Hinckley in Hinckley. AskCar page: https://askcar.co.uk/car/audi-a3-2021-8dfede7c20ea
• 2021 Audi A3 S Line, 1.5 petrol saloon, black. Mileage: 31,587 miles. Price: £20,950, £2,613 more than this car. Dealer: Group 1 Automotive Chingford Audi in Chingford. AskCar page: https://askcar.co.uk/car/audi-a3-2021-6c4c89e0748f
• 2021 Audi A3 S Line, 1.5 petrol saloon, white. Mileage: 32,077 miles. Price: £18,795, £458 more than this car. Dealer: Car Brothers NI in Newtownabbey. AskCar page: https://askcar.co.uk/car/audi-a3-2021-21b9c79555a3

• The nearest: 2021 Audi A3 S Line, 1.5 petrol saloon, white, 29 miles from this car. Mileage: 33,764 miles. Price: £19,199, £862 more than this car. Dealer: Cinch Ev Superstore Derby in Derby. AskCar page: https://askcar.co.uk/car/audi-a3-2021-67eb248d1a7c