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: 42,342 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: Grey
• CO2: 135 g/km
• Emissions standard: Euro 6, ULEZ compliant

About this car

This 2021 Audi A3 S Line is advertised with 42,342 miles on the clock. Its asking price of £19,750 is £1,511 above the AskCar estimate of £18,239. The AskCar estimate uses UK dealer asking prices, including 6,542 Audi A3 adverts, and accounts for the car’s age, mileage and specification. We first recorded this advert 24 days ago, and its asking price has since fallen by £250. According to the government's MOT record, its advertised mileage is consistent with the latest test. The seller is Sytner Group Nottingham Audi, based in Nottingham. 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

Above the going rate: £1,511 (8%) over the AskCar estimate of £18,239.

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 24 days.

Price history

AskCar first saw this advert on 9 October 2026 at £20,000. Its asking price is now £19,750, £250 less. The latest price cut was seen on 24 October 2026.

Price changes recorded:

• 9 October 2026: £20,000
• 24 October 2026: £19,750

Mileage and MOT

MOT, from the government's MOT records (DVSA, the Driver and Vehicle Standards Agency), as of 2 November 2026: valid until 3 November 2026.

It failed its MOT on 15 October 2026 (nearside headlamp aim too high) and passed later the same day.

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

Mileage at that test: 42,342 miles, which matches the advertised 42,342 miles.

Advertised mileage is about 1,300 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, blue. Mileage: 42,379 miles. Price: £17,699, £2,051 less than this car. Dealer: Hartwell Kidlington in Kidlington. AskCar page: https://askcar.co.uk/car/audi-a3-2021-a2adc0ca3b6b
• 2021 Audi A3 S Line, 1.5 petrol hatchback, grey. Mileage: 41,270 miles. Price: £17,507, £2,243 less than this car. Dealer: Cargem in Rainham. AskCar page: https://askcar.co.uk/car/audi-a3-2021-43f7591315bd
• 2021 Audi A3 S Line, 1.5 petrol hatchback, blue. Mileage: 41,000 miles. Price: £18,995, £755 less than this car. Dealer: Grampian Cars in Macduff. AskCar page: https://askcar.co.uk/car/audi-a3-2021-ff4ecb3467fe

• The nearest: 2021 Audi A3 S Line, 1.5 petrol hatchback, blue, under a mile from this car. Mileage: 58,985 miles. Price: £16,400, £3,350 less than this car. Dealer: Sytner Select Nottingham in Nottingham. AskCar page: https://askcar.co.uk/car/audi-a3-2021-5ed414bf4cce