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: 39,784 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

At 39,784 miles, this 2021 Audi A3 S Line has covered about 2,800 fewer miles than other 2021 Audi A3 cars. Its asking price of £15,990 is £865 below the AskCar estimate of £16,855. The AskCar estimate draws on 6,645 Audi A3 adverts across the UK, adjusting for age, mileage, trim, engine and other specifications. We first saw this car advertised 34 days ago. Its asking price has since fallen by £1,000. According to the government's MOT record, its advertised mileage is consistent with the latest test. The seller is Swansway Garages Crewe Audi, based in Crewe. 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: £865 (5%) under the AskCar estimate of £16,855.

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

This 2021 Audi A3 has been on sale for at least 34 days.

Price history

AskCar first saw this advert on 2 October 2026 at £16,990. Its asking price is now £15,990, £1,000 less. The latest price cut was seen on 5 November 2026.

Price changes recorded:

• 2 October 2026: £16,990
• 1 November 2026: £16,190
• 5 November 2026: £15,990

Mileage and MOT

MOT, from the government's MOT records (DVSA, the Driver and Vehicle Standards Agency), as of 5 November 2026: valid until 3 July 2027.

It has had 3 MOTs. The latest, on 4 July 2026, passed.

Advisories at the latest test: offside front road wheel slightly distorted inner rim.

Mileage at that test: 37,618 miles, which matches the advertised 39,784 miles.

Advertised mileage is about 2,800 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, red. Mileage: 39,260 miles. Price: £16,099, £109 more 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, red. Mileage: 37,553 miles. Price: £17,498, £1,508 more 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, grey. Mileage: 42,370 miles. Price: £16,490, £500 more than this car. Dealer: Stratstone Amersham Audi in Amersham. AskCar page: https://askcar.co.uk/car/audi-a3-2021-2ac793bc074e

• The nearest: 2021 Audi A3 S Line, 1.5 petrol hatchback, white, 24 miles from this car. Mileage: 57,450 miles. Price: £15,180, £810 less than this car. Dealer: Big Motoring World Warrington in Warrington. AskCar page: https://askcar.co.uk/car/audi-a3-2021-5ca99fe74966