2021 Audi Q3 2.0 TDI S Line

Overview

• Make: Audi
• Model: Q3
• Trim: S Line
• Version: 2.0 TDI S Line S tronic FWD Euro 6 5dr (147 bhp)
• Year: 2021
• Mileage: 40,000 miles
• Fuel: Diesel
• Body: SUV, 5 doors, 5 seats
• Engine: 2.0 litres, 147 bhp
• Gearbox: Automatic (S tronic)
• Drive: Front-wheel drive
• Colour: Grey
• CO2: 149 g/km
• Emissions standard: Euro 6, ULEZ compliant

About this car

This 2021 Audi Q3 S Line is advertised with 40,000 miles, approximately 2,000 below the typical mileage for its age. The AskCar estimate for this car is £20,889. It is priced at £19,990, which is £899 below that estimate. To work out the AskCar estimate, we analyse UK dealer adverts for 3,499 Audi Q3 cars across different ages and specifications. The asking price is now £500 lower than when we first recorded the advert 26 days ago. We checked its advertised mileage against the government's MOT record, and they match. You can find this car at Monarch Motor Company in Redditch. 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: £899 (4%) under the AskCar estimate of £20,889.

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 3,499 priced Audi Q3 adverts across different ages and specifications, as of 5 November 2026.

A 2021 Audi Q3 with the 2.0 diesel engine is typically advertised at £20,300: the median of the 75 for sale on AskCar, as of 5 November 2026.

Time on sale

This 2021 Audi Q3 has been on sale for at least 26 days.

Price history

AskCar first saw this advert on 10 October 2026 at £20,490. Its asking price is now £19,990, £500 less. The latest price cut was seen on 13 October 2026.

Price changes recorded:

• 10 October 2026: £20,490
• 13 October 2026: £19,990

Mileage and MOT

MOT, from the government's MOT records (DVSA, the Driver and Vehicle Standards Agency), as of 5 November 2026: valid until 28 December 2026.

It has had 2 MOTs. The latest, on 8 December 2025, passed.

There were no advisories at the latest test.

Mileage at that test: 36,552 miles, which matches the advertised 40,000 miles.

Advertised mileage is about 2,000 miles lower than the median mileage of a 2021 Audi Q3 on AskCar.

Similar cars

20 other 2021 Audi Q3 S Line 2.0 diesel automatic SUVs are for sale at UK dealers, from £14,499 to £22,995, as of 5 November 2026.

The 3 closest to this car in mileage:

• 2021 Audi Q3 S Line, 2.0 diesel SUV, grey. Mileage: 40,326 miles. Price: £18,500, £1,490 less than this car. Dealer: Quality Part X Dunstable in Dunstable. AskCar page: https://askcar.co.uk/car/audi-q3-2021-77e2da1d904f
• 2021 Audi Q3 S Line, 2.0 diesel SUV, blue. Mileage: 33,714 miles. Price: £20,150, £160 more than this car. Dealer: Evans Halshaw BYD Chesterfield in Chesterfield. AskCar page: https://askcar.co.uk/car/audi-q3-2021-55725fc3cdfc
• 2021 Audi Q3 S Line, 2.0 diesel SUV, grey. Mileage: 48,256 miles. Price: £19,591, £399 less than this car. Dealer: Cars2 in Bradford. AskCar page: https://askcar.co.uk/car/audi-q3-2021-0aed98e567f3

• The nearest: 2021 Audi Q3 S Line, 2.0 diesel SUV, black, 39 miles from this car. Mileage: 81,102 miles. Price: £17,498, £2,492 less than this car. Dealer: Arnold Clark Burton upon Trent Motorstore in Burton upon Trent. AskCar page: https://askcar.co.uk/car/audi-q3-2021-10e03a36b786