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: 37,553 miles
• Fuel: Petrol
• Body: Hatchback, 5 doors, 5 seats
• Engine: 1.5 litres, 148 bhp
• Gearbox: Manual
• Drive: Front-wheel drive
• Colour: Red
• CO2: 136 g/km
• Emissions standard: Euro 6, ULEZ compliant

About this car

At 37,553 miles, this 2021 Audi A3 S Line has covered about 5,100 fewer miles than other 2021 Audi A3 cars. The AskCar estimate for this car is £17,057. It is priced at £17,498, which is £441 above that estimate. To work out the AskCar estimate, we analyse UK dealer adverts for 6,645 Audi A3 cars across different ages and specifications. We have tracked this advert today. Its advertised mileage matches the government's MOT record. The seller is Arnold Clark Peterhead MG, based in Peterhead. How to contact the dealer and its opening hours are on this AskCar page.

Stock data as of 5 November 2026.

How we estimate prices and check cars

Price

Fair price: £441 (2%) over the AskCar estimate of £17,057.

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 6,645 priced Audi A3 adverts across different ages and specifications, as of 5 November 2026.

A 2021 Audi A3 with the 1.5 petrol engine is typically advertised at £18,000: the median of the 200 for sale on AskCar, as of 5 November 2026.

Time on sale

AskCar first saw this 2021 Audi A3 advertised today. About 6 in 10 of 2021 Audi A3 cars are gone from sale within a month of being advertised: 426 of the 756 first advertised between 7 July 2026 and 2 October 2026.

Price history

AskCar first saw this advert on 5 November 2026 at £17,498. 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 5 November 2026: valid until 20 November 2027.

It has had 5 MOTs. The latest, on 27 October 2026, passed.

There were no advisories at the latest test.

Mileage at that test: 37,540 miles, which matches the advertised 37,553 miles.

Advertised mileage is about 5,100 miles lower than the median mileage of a 2021 Audi A3 on AskCar.

Similar cars

26 other 2021 Audi A3 S Line 1.5 petrol manual hatchbacks are for sale at UK dealers, from £12,795 to £18,590, as of 5 November 2026.

The 3 closest to this car in mileage:

• 2021 Audi A3 S Line, 1.5 petrol hatchback, white. Mileage: 36,065 miles. Price: £15,990, £1,508 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: £16,099, £1,399 less than this car. Dealer: cinch in Bexley. AskCar page: https://askcar.co.uk/car/audi-a3-2021-89db664f157c
• 2021 Audi A3 S Line, 1.5 petrol hatchback, blue. Mileage: 35,511 miles. Price: £17,667, £169 more than this car. Dealer: LSH Auto Mercedes-Benz of Stockport in Stockport. AskCar page: https://askcar.co.uk/car/audi-a3-2021-6a9ce2127541

• The nearest: 2021 Audi A3 S Line, 1.5 petrol hatchback, black, 83 miles from this car. Mileage: 33,741 miles. Price: £17,695, £197 more than this car. Dealer: Hawco Group in Dundee. AskCar page: https://askcar.co.uk/car/audi-a3-2021-53ed96e05fc1