2021 Audi A3 1.5 TFSI S Line

Overview

• Make: Audi
• Model: A3
• Trim: S Line
• Version: 1.5 TFSI 35 S Line S tronic FWD Euro 6 (s/s) 5dr Sportback (148 bhp)
• Year: 2021
• Mileage: 45,500 miles
• Fuel: Petrol, mild hybrid
• Body: Hatchback, 5 doors, 5 seats
• Engine: 1.5 litres, 148 bhp
• Gearbox: Automatic (S tronic)
• Drive: Front-wheel drive
• Colour: Grey
• CO2: 135 g/km
• Emissions standard: Euro 6, ULEZ compliant

About this car

With 45,500 miles on the clock, this 2021 Audi A3 S Line has done roughly 2,300 more miles than a typical 2021 Audi A3. The dealer is asking £17,898, which is £63 above the AskCar estimate of £17,835. To work out the AskCar estimate, we analyse UK dealer adverts for 6,630 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 Auto Vuego Motors, based in Uxbridge. How to contact the dealer and its opening hours are on this AskCar page.

Stock data as of 4 November 2026.

How we estimate prices and check cars

Price

Fair price: £63 (under 1%) over the AskCar estimate of £17,835.

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 6,630 priced Audi A3 adverts across different ages and specifications, as of 4 November 2026.

A 2021 Audi A3 with the 1.5 petrol engine is typically advertised at £18,000: the median of the 194 for sale on AskCar, as of 4 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: 419 of the 741 first advertised between 7 July 2026 and 1 October 2026.

Price history

AskCar first saw this advert on 4 November 2026 at £17,898. 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 4 November 2026: valid until 11 August 2027.

It has had 4 MOTs. The latest, on 11 August 2026, passed.

There were no advisories at the latest test.

Mileage at that test: 43,660 miles, which matches the advertised 45,500 miles.

Advertised mileage is about 2,300 miles higher than the median mileage of a 2021 Audi A3 on AskCar.

Similar cars

54 other 2021 Audi A3 S Line 1.5 petrol automatic hatchbacks are for sale at UK dealers, from £11,990 to £21,995, as of 4 November 2026.

The 3 closest to this car in mileage:

• 2021 Audi A3 S Line, 1.5 petrol hatchback, grey. Mileage: 45,860 miles. Price: £17,995, £97 more than this car. Dealer: ARJ Motors in Addlestone. AskCar page: https://askcar.co.uk/car/audi-a3-2021-39034688bbc9
• 2021 Audi A3 S Line, 1.5 petrol hatchback, red. Mileage: 46,087 miles. Price: £16,959, £939 less than this car. Dealer: Carsa Cannock in Cannock. AskCar page: https://askcar.co.uk/car/audi-a3-2021-5c2ab42d2bcf
• 2021 Audi A3 S Line, 1.5 petrol hatchback, black. Mileage: 44,821 miles. Price: £17,699, £199 less than this car. Dealer: Carherts in Aylesbury. AskCar page: https://askcar.co.uk/car/audi-a3-2021-6de78dd713d8

• The nearest: 2021 Audi A3 S Line, 1.5 petrol hatchback, blue, 6 miles from this car. Mileage: 22,000 miles. Price: £21,995, £4,097 more than this car. Dealer: AM Autohaus in Slough. AskCar page: https://askcar.co.uk/car/audi-a3-2021-58a7db9d6038