2021 Audi A3 1.5 TFSI S Line

Overview

• Make: Audi
• Model: A3
• Trim: S Line
• Version: 1.5 TFSI 35 S Line Manual FWD Euro 6 (s/s) 5dr Sportback (148 bhp)
• Year: 2021
• Mileage: 35,509 miles
• Fuel: Petrol
• Body: Hatchback, 5 doors, 5 seats
• Engine: 1.5 litres, 148 bhp
• Gearbox: Manual
• Drive: Front-wheel drive
• Colour: Blue
• CO2: 136 g/km
• Emissions standard: Euro 6, ULEZ compliant

About this car

This 2021 Audi A3 S Line is advertised with 35,509 miles, approximately 8,100 below the typical mileage for its age. Its asking price of £17,135 is £60 below the AskCar estimate of £17,195. The AskCar estimate draws on 6,542 Audi A3 adverts across the UK, adjusting for age, mileage, trim, engine and other specifications. We have tracked this advert for 9 days. Its advertised mileage matches the government's MOT record. The seller is LSH Auto Mercedes-Benz of Stockport, based in Stockport. 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: £60 (under 1%) under the AskCar estimate of £17,195.

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 9 days.

Price history

AskCar first saw this advert on 24 October 2026 at £17,135. Its asking price has not changed.

Mileage and MOT

MOT, from the government's MOT records (DVSA, the Driver and Vehicle Standards Agency), as of 2 November 2026: valid until 12 August 2027.

It has had 3 MOTs. The latest, on 3 August 2026, passed.

Advisories at the latest test: nearside rear child seat fitted not allowing full inspection of adult belt; rear washer jet not working; nearside front tyre worn close to legal limit/worn on edge; and 1 more.

Mileage at that test: 32,446 miles, which matches the advertised 35,509 miles.

Advertised mileage is about 8,100 miles lower than the median mileage of a 2021 Audi A3 on AskCar.

Similar cars

20 other 2021 Audi A3 S Line 1.5 petrol manual hatchbacks are for sale at UK dealers, from £12,895 to £18,490, as of 2 November 2026.

The 3 closest to this car in mileage:

• 2021 Audi A3 S Line, 1.5 petrol hatchback, black. Mileage: 34,973 miles. Price: £16,995, £140 less than this car. Dealer: Carite in Swindon. AskCar page: https://askcar.co.uk/car/audi-a3-2021-4bc74adb4490
• 2021 Audi A3 S Line, 1.5 petrol hatchback, white. Mileage: 36,065 miles. Price: £15,990, £1,145 less than this car. Dealer: Carworld Car Supermarket in Peterborough. AskCar page: https://askcar.co.uk/car/audi-a3-2021-8262eb5d5772
• 2021 Audi A3 S Line, 1.5 petrol hatchback, red. Mileage: 39,260 miles. Price: £16,394, £741 less than this car. Dealer: cinch in Bexley. AskCar page: https://askcar.co.uk/car/audi-a3-2021-89db664f157c

• The nearest: 2021 Audi A3 S Line, 1.5 petrol hatchback, white, 14 miles from this car. Mileage: 60,000 miles. Price: £14,874, £2,261 less than this car. Dealer: CarTime in Bury. AskCar page: https://askcar.co.uk/car/audi-a3-2021-dd43add68bec