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: 38,308 miles
• Fuel: Petrol
• Body: Hatchback, 5 doors, 5 seats
• Engine: 1.5 litres, 148 bhp
• Gearbox: Manual
• Drive: Front-wheel drive
• Colour: Grey
• CO2: 136 g/km
• Emissions standard: Euro 6, ULEZ compliant

About this car

This 2021 Audi A3 S Line has covered 38,308 miles, around 5,200 fewer miles than is typical for its age. Priced at £17,750, it is advertised £819 above the AskCar estimate of £16,931. The AskCar estimate draws on 6,702 Audi A3 adverts across the UK, adjusting for age, mileage, trim, engine and other specifications. This car was first seen in our listings data today. We checked its advertised mileage against the government's MOT record, and they match. The seller is Sytner Group Huddersfield Audi, based in Huddersfield. How to contact the dealer and its opening hours are on this AskCar page.

Stock data as of 11 November 2026.

How we estimate prices and check cars

Price

Fair price: £819 (4%) over the AskCar estimate of £16,931.

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 6,702 priced Audi A3 adverts across different ages and specifications, as of 11 November 2026.

A 2021 Audi A3 with the 1.5 petrol engine is typically advertised at £17,700: the median of the 190 for sale on AskCar, as of 11 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: 465 of the 821 first advertised between 11 July 2026 and 8 October 2026.

Price history

AskCar first saw this advert on 11 November 2026 at £17,750. 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 11 November 2026: valid until 27 October 2027.

It has had 3 MOTs. The latest, on 20 October 2026, passed.

There were no advisories at the latest test.

Mileage at that test: 38,164 miles, which matches the advertised 38,308 miles.

Advertised mileage is about 5,200 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 £20,127, as of 11 November 2026.

The 3 closest to this car in mileage:

• 2021 Audi A3 S Line, 1.5 petrol hatchback, red. Mileage: 37,553 miles. Price: £17,498, £252 less than this car. Dealer: Arnold Clark Peterhead MG in Peterhead. AskCar page: https://askcar.co.uk/car/audi-a3-2021-afa1c36d6057
• 2021 Audi A3 S Line, 1.5 petrol hatchback, red. Mileage: 39,260 miles. Price: £16,000, £1,750 less than this car. Dealer: Marshall Motor Group Bexley Audi in Bexley. AskCar page: https://askcar.co.uk/car/audi-a3-2021-dad18bf4bd21
• 2021 Audi A3 S Line, 1.5 petrol hatchback, blue. Mileage: 39,784 miles. Price: £15,990, £1,760 less than this car. Dealer: Swansway Garages Crewe Audi in Crewe. AskCar page: https://askcar.co.uk/car/audi-a3-2021-ff0c4aaa638c

• The nearest: 2021 Audi A3 S Line, 1.5 petrol hatchback, white, 23 miles from this car. Mileage: 60,000 miles. Price: £14,600, £3,150 less than this car. Dealer: CarTime in Bury. AskCar page: https://askcar.co.uk/car/audi-a3-2021-dd43add68bec