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: 43,056 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: Black
• CO2: 131 g/km
• Emissions standard: Euro 6, ULEZ compliant

About this car

This 2021 Audi A3 S Line has covered 43,056 miles. Its asking price of £17,230 is £1,003 below the AskCar estimate of £18,233. 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 64 days, and its asking price has been cut by £1,110. We checked its advertised mileage against the government's MOT record, and they match. The seller is Evans Halshaw Ford Middlesbrough, based in Middlesbrough. 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: £1,003 (5%) under the AskCar estimate of £18,233.

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 64 days, and its asking price has been cut by £1,110. 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 30 August 2026 at £18,340. Its asking price is now £17,230, £1,110 less. The latest price cut was seen on 14 October 2026.

Price changes recorded:

• 30 August 2026: £18,340
• 2 September 2026: £18,010
• 8 September 2026: £17,900
• 29 September 2026: £17,790
• 7 October 2026: £17,590
• 14 October 2026: £17,230

Mileage and MOT

MOT, from the government's MOT records (DVSA, the Driver and Vehicle Standards Agency), as of 2 November 2026: valid until 18 August 2027.

It failed its MOT on 30 July 2026 (tyre obviously under inflated tyre obviously deflated; nearside rear tyre has a lump, caused by separation or partial failure of its structure) and passed 2 days later, on 1 August 2026.

Advisories at the latest test: offside front brake disc worn, pitted or scored, but not seriously weakened.

Mileage at that test: 42,160 miles, which matches the advertised 43,056 miles.

Advertised mileage is about 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, black. Mileage: 42,005 miles. Price: £18,495, £1,265 more than this car. Dealer: Ideal Car Centre in Bilston. AskCar page: https://askcar.co.uk/car/audi-a3-2021-e8fc33b343a6
• 2021 Audi A3 S Line, 1.5 petrol saloon, grey. Mileage: 44,306 miles. Price: £18,463, £1,233 more than this car. Dealer: Lookers Audi Wearside in Sunderland. AskCar page: https://askcar.co.uk/car/audi-a3-2021-0107a0584ca4
• 2021 Audi A3 S Line, 1.5 petrol saloon, grey. Mileage: 41,349 miles. Price: £16,498, £732 less than this car. Dealer: Lookers Car Hub South Shields in South Shields. AskCar page: https://askcar.co.uk/car/audi-a3-2021-cd81b2494418

• The nearest: 2021 Audi A3 S Line, 1.5 petrol saloon, grey, 5 miles from this car. Mileage: 53,412 miles. Price: £17,250, the same price as this car. Dealer: Vertu Honda Stockton in Stockton-on-Tees. AskCar page: https://askcar.co.uk/car/audi-a3-2021-cd7c671bba5d