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: 32,000 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

This 2021 Audi A3 S Line is advertised with 32,000 miles on the clock. The AskCar estimate for this car is £19,280. It is priced at £17,880, which is £1,400 below that estimate. To work out the AskCar estimate, we analyse UK dealer adverts for 6,542 Audi A3 cars across different ages and specifications. The asking price is now £1,460 lower than when we first recorded the advert 158 days ago. Ask the dealer why the advert shows fewer miles than the 32,560 recorded at the latest MOT. MOT records show an expiry date of 29 November 2026. You can find this car at Wembley Prestige Cars in Bushey. 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: £1,400 (7%) under the AskCar estimate of £19,280.

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 £19,340. Its asking price is now £17,880, £1,460 less. The latest price cut was seen on 1 November 2026.

Price changes recorded:

• 28 May 2026: £19,340
• 1 June 2026: £18,880
• 23 July 2026: £18,680
• 18 October 2026: £18,480
• 1 November 2026: £17,880

Mileage and MOT

MOT, from the government's MOT records (DVSA, the Driver and Vehicle Standards Agency), as of 2 November 2026: valid until 29 November 2026.

It has had 2 MOTs. The latest, on 26 November 2025, passed.

Advisories at the latest test: front brake pad(s) wearing thin; offside rear tyre worn close to legal limit/worn on edge; offside front bumper mountings corroded but not likely to become detached.

Mileage at that test: 32,560 miles. The advert says 32,000 miles, fewer than the MOT record, so ask the dealer which is right.

Advertised mileage is about 11,600 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, grey. Mileage: 31,894 miles. Price: £20,750, £2,870 more than this car. Dealer: Sytner Group Leicester Audi in Leicester. AskCar page: https://askcar.co.uk/car/audi-a3-2021-f9136d8c47ea
• 2021 Audi A3 S Line, 1.5 petrol hatchback, red. Mileage: 31,821 miles. Price: £19,299, £1,419 more than this car. Dealer: cinch Corby in Corby. AskCar page: https://askcar.co.uk/car/audi-a3-2021-fef5a492f628
• 2021 Audi A3 S Line, 1.5 petrol hatchback, grey. Mileage: 32,574 miles. Price: £20,330, £2,450 more than this car. Dealer: Prestige Cars Of Essex in Harlow. AskCar page: https://askcar.co.uk/car/audi-a3-2021-86742b42df02

• The nearest: 2021 Audi A3 S Line, 1.5 petrol hatchback, blue, 14 miles from this car. Mileage: 22,000 miles. Price: £21,995, £4,115 more than this car. Dealer: AM Autohaus in Slough. AskCar page: https://askcar.co.uk/car/audi-a3-2021-58a7db9d6038