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) 4dr (148 bhp)
• Year: 2021
• Mileage: 43,240 miles
• Fuel: Petrol
• Body: Saloon, 4 doors, 5 seats
• Engine: 1.5 litres, 148 bhp
• Gearbox: Manual
• Drive: Front-wheel drive
• Colour: Grey
• CO2: 133 g/km
• Emissions standard: Euro 6, ULEZ compliant

About this car

The advertised mileage for this 2021 Audi A3 S Line is 43,240 miles. Priced at £16,988, it is advertised £206 below the AskCar estimate of £17,194. The AskCar estimate uses 6,630 UK dealer adverts for the Audi A3, with adjustments for age, mileage, trim, engine and other specifications. We first saw this car advertised 15 days ago. Its asking price has since fallen by £362. According to the government's MOT record, its advertised mileage is consistent with the latest test. The seller is Group 1 Automotive Audi Approved Colchester, based in Colchester. 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: £206 (1%) under the AskCar estimate of £17,194.

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

This 2021 Audi A3 has been on sale for at least 15 days.

Price history

AskCar first saw this advert on 20 October 2026 at £17,350. Its asking price is now £16,988, £362 less. The latest price cut was seen on 28 October 2026.

Price changes recorded:

• 20 October 2026: £17,350
• 28 October 2026: £16,988

Mileage and MOT

MOT, from the government's MOT records (DVSA, the Driver and Vehicle Standards Agency), as of 4 November 2026: valid until 25 June 2027.

It has had 3 MOTs. The latest, on 8 June 2026, passed.

Advisories at the latest test: various small stone chips to windscreen.

Mileage at that test: 41,145 miles, which matches the advertised 43,240 miles.

Similar cars

5 other 2021 Audi A3 S Line 1.5 petrol manual saloons are for sale at UK dealers, from £15,500 to £17,999, as of 4 November 2026.

The 3 closest to this car in mileage:

• 2021 Audi A3 S Line, 1.5 petrol saloon, grey. Mileage: 47,969 miles. Price: £17,999, £1,011 more than this car. Dealer: Hawco Group in Aberdeen. AskCar page: https://askcar.co.uk/car/audi-a3-2021-d6788c1e1abc
• 2021 Audi A3 S Line, 1.5 petrol saloon, black. Mileage: 53,215 miles. Price: £15,799, £1,189 less than this car. Dealer: cinch in Nottingham. AskCar page: https://askcar.co.uk/car/audi-a3-2021-e12fa792e6c4
• 2021 Audi A3 S Line, 1.5 petrol saloon, grey. Mileage: 54,283 miles. Price: £15,500, £1,488 less than this car. Dealer: Autotrade (Birmingham) in Birmingham. AskCar page: https://askcar.co.uk/car/audi-a3-2021-f53bd309aa6a

• The nearest: 2021 Audi A3 S Line, 1.5 petrol saloon, blue, 89 miles from this car. Mileage: 63,956 miles. Price: £15,895, £1,093 less than this car. Dealer: Caffyns Volkswagen Brighton in Brighton and Hove. AskCar page: https://askcar.co.uk/car/audi-a3-2021-7a26f907d618