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: 48,615 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: White
• CO2: 135 g/km
• Emissions standard: Euro 6, ULEZ compliant

About this car

At 48,615 miles, this 2021 Audi A3 S Line has covered about 5,000 more miles than other 2021 Audi A3 cars. The AskCar estimate for this car is £17,635. It is priced at £17,995, which is £360 above that estimate. To work out the AskCar estimate, we analyse UK dealer adverts for 6,542 Audi A3 cars across different ages and specifications. It first appeared in our advert records 55 days ago. The government's MOT record matches its advertised mileage. You can find this car at Hippo Approved in Blackburn. 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: £360 (2%) over the AskCar estimate of £17,635.

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 55 days.

Price history

AskCar first saw this advert on 8 September 2026 at £17,320. Its asking price is now £17,995, £675 more.

Price changes recorded:

• 8 September 2026: £17,320
• 15 September 2026: £17,420
• 16 September 2026: £17,400
• 24 September 2026: £16,920
• 1 October 2026: £17,955
• 2 October 2026: £16,920
• 4 October 2026: £17,955
• 7 October 2026: £16,920
• 9 October 2026: £17,060
• 14 October 2026: £17,040
• 16 October 2026: £17,020
• 23 October 2026: £16,980
• 24 October 2026: £16,960
• 1 November 2026: £17,995

Mileage and MOT

MOT, from the government's MOT records (DVSA, the Driver and Vehicle Standards Agency), as of 2 November 2026: valid until 25 March 2027.

It failed its MOT on 11 March 2026 (offside front shock absorbers has negligible damping effect; nearside rear brake pad(s) worn down to wear indicator inner brake pad) and passed later the same day.

Advisories at the latest test: nearside front shock absorbers has a reduced damping effect.

Mileage at that test: 45,872 miles, which matches the advertised 48,615 miles.

Advertised mileage is about 5,000 miles higher 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, white. Mileage: 48,200 miles. Price: £17,060, £935 less than this car. Dealer: Evans Halshaw Ford Motherwell in Motherwell. AskCar page: https://askcar.co.uk/car/audi-a3-2021-1e9202be6004
• 2021 Audi A3 S Line, 1.5 petrol hatchback, grey. Mileage: 47,445 miles. Price: £17,880, £115 less than this car. Dealer: Vehicle Select in Bolton. AskCar page: https://askcar.co.uk/car/audi-a3-2021-81fb582f93b3
• 2021 Audi A3 S Line, 1.5 petrol hatchback, white. Mileage: 50,500 miles. Price: £16,790, £1,205 less than this car. Dealer: K Motors London in New Malden. AskCar page: https://askcar.co.uk/car/audi-a3-2021-955301d556ce

• The nearest: 2021 Audi A3 S Line, 1.5 petrol hatchback, black, 9 miles from this car. Mileage: 58,857 miles. Price: £16,995, £1,000 less than this car. Dealer: Independent Motor Group in Burnley. AskCar page: https://askcar.co.uk/car/audi-a3-2021-23cd15e99de4