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: 42,005 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

The advertised mileage for this 2021 Audi A3 S Line is 42,005 miles. Priced at £18,495, it is advertised £159 above the AskCar estimate of £18,336. The AskCar estimate uses UK dealer asking prices, including 6,542 Audi A3 adverts, and accounts for the car’s age, mileage and specification. Since we first spotted the advert 158 days ago, the asking price has dropped by £500. Our latest MOT record expired on 25 September 2026. Check the current position with the dealer. The government's MOT record matches its advertised mileage. It is for sale at Ideal Car Centre in Bilston. 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: £159 (under 1%) over the AskCar estimate of £18,336.

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 158 days.

Price history

AskCar first saw this advert on 28 May 2026 at £18,995. Its asking price is now £18,495, £500 less. The latest price cut was seen on 5 August 2026.

Price changes recorded:

• 28 May 2026: £18,995
• 22 July 2026: £18,795
• 5 August 2026: £18,495

Mileage and MOT

MOT, from the government's MOT records (DVSA, the Driver and Vehicle Standards Agency), as of 2 November 2026: the latest record we hold ran out on 25 September 2026; ask the dealer for the current MOT.

It has had 2 MOTs. The latest, on 19 September 2025, passed.

There were no advisories at the latest test.

Mileage at that test: 41,634 miles, which matches the advertised 42,005 miles.

Advertised mileage is about 1,600 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: 41,349 miles. Price: £16,498, £1,997 less than this car. Dealer: Lookers Car Hub South Shields in South Shields. AskCar page: https://askcar.co.uk/car/audi-a3-2021-cd81b2494418
• 2021 Audi A3 S Line, 1.5 petrol saloon, grey. Mileage: 41,000 miles. Price: £18,595, £100 more than this car. Dealer: T & S Elite Cars in Kingston upon Hull. AskCar page: https://askcar.co.uk/car/audi-a3-2021-3efd6aa0f4e5
• 2021 Audi A3 S Line, 1.5 petrol saloon, black. Mileage: 43,056 miles. Price: £17,230, £1,265 less than this car. Dealer: Evans Halshaw Ford Middlesbrough in Middlesbrough. AskCar page: https://askcar.co.uk/car/audi-a3-2021-b2308c40c33d

• The nearest: 2021 Audi A3 S Line, 1.5 petrol saloon, black, 28 miles from this car. Mileage: 40,772 miles. Price: £16,370, £2,125 less than this car. Dealer: Hilton Garage in Derby. AskCar page: https://askcar.co.uk/car/audi-a3-2021-8cea3620043c