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: 39,260 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

This 2021 Audi A3 S Line is advertised with 39,260 miles, approximately 3,100 below the typical mileage for its age. Its asking price of £16,000 is £903 below the AskCar estimate of £16,903. To work out the AskCar estimate, we analyse UK dealer adverts for 6,729 Audi A3 cars across different ages and specifications. The dealer may accept less: this car has been on sale for at least 95 days, and its asking price has been cut by £2,100. We checked its advertised mileage against the government's MOT record, and they match. The seller is Marshall Motor Group Bexley Audi, based in Bexley. How to contact the dealer and its opening hours are on this AskCar page.

Stock data as of 6 November 2026.

How we estimate prices and check cars

Price

Fair price: £903 (5%) under the AskCar estimate of £16,903.

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 6,729 priced Audi A3 adverts across different ages and specifications, as of 6 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 6 November 2026.

Time on sale

The dealer may accept less. This 2021 Audi A3 has been on sale for at least 95 days, and its asking price has been cut by £2,100. About 6 in 10 of 2021 Audi A3 cars are gone from sale within a month of being advertised: 433 of the 772 first advertised between 7 July 2026 and 3 October 2026.

Price history

AskCar first saw this advert on 3 August 2026 at £18,100. Its asking price is now £16,000, £2,100 less. The latest price cut was seen on 3 November 2026.

Price changes recorded:

• 3 August 2026: £18,100
• 21 August 2026: £17,900
• 28 August 2026: £18,000
• 4 September 2026: £17,900
• 15 September 2026: £17,595
• 25 September 2026: £17,496
• 4 October 2026: £16,995
• 9 October 2026: £16,895
• 15 October 2026: £16,795
• 18 October 2026: £16,595
• 20 October 2026: £16,495
• 24 October 2026: £16,395
• 29 October 2026: £16,295
• 3 November 2026: £16,000

Mileage and MOT

MOT, from the government's MOT records (DVSA, the Driver and Vehicle Standards Agency), as of 6 November 2026: valid until 27 June 2027.

It has had 3 MOTs. The latest, on 18 June 2026, passed.

Advisories at the latest test: nearside rear child seat fitted not allowing full inspection of adult belt.

Mileage at that test: 38,574 miles, which matches the advertised 39,260 miles.

Advertised mileage is about 3,100 miles lower than the median mileage of a 2021 Audi A3 on AskCar.

Similar cars

25 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 6 November 2026.

The 3 closest to this car in mileage:

• 2021 Audi A3 S Line, 1.5 petrol hatchback, blue. Mileage: 39,784 miles. Price: £15,990, the same price as this car. Dealer: Swansway Garages Crewe Audi in Crewe. AskCar page: https://askcar.co.uk/car/audi-a3-2021-ff0c4aaa638c
• 2021 Audi A3 S Line, 1.5 petrol hatchback, red. Mileage: 37,553 miles. Price: £17,498, £1,498 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, £490 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, grey, 18 miles from this car. Mileage: 26,224 miles. Price: £17,480, £1,480 more than this car. Dealer: Big Motoring World Blue Bell Hill in Blue Bell Hill. AskCar page: https://askcar.co.uk/car/audi-a3-2021-3d5ebf92bd6d