2021 Audi Q3 2.0 TDI S Line

Overview

• Make: Audi
• Model: Q3
• Trim: S Line
• Version: 2.0 TDI 40 S Line S tronic 4WD Euro 6 (s/s) 5dr (197 bhp)
• Year: 2021
• Mileage: 71,018 miles
• Fuel: Diesel
• Body: SUV, 5 doors, 5 seats
• Engine: 2.0 litres, 197 bhp
• Gearbox: Automatic (S tronic)
• Drive: Four-wheel drive
• Colour: Grey
• CO2: 174 g/km
• Emissions standard: Euro 6, ULEZ compliant

About this car

With 71,018 miles on the clock, this 2021 Audi Q3 S Line has done roughly 29,000 more miles than a typical 2021 Audi Q3. Priced at £17,989, it is advertised £1,104 below the AskCar estimate of £19,093. The AskCar estimate uses 3,432 UK dealer adverts for the Audi Q3, with adjustments for age, mileage, trim, engine and other specifications. We first recorded this advert 158 days ago, and its asking price has since fallen by £2,000. Its advertised mileage matches the government's MOT record. You can find this car at The Hertford Car Company in Bayford. How to contact the dealer and its opening hours are on this AskCar page.

Stock data as of 2 November 2026.

How we estimate prices and check cars

Price

Fair price: £1,104 (5%) under the AskCar estimate of £19,093.

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 3,432 priced Audi Q3 adverts across different ages and specifications, as of 2 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 2 November 2026.

Time on sale

This 2021 Audi Q3 has been on sale for at least 158 days.

Price history

AskCar first saw this advert on 28 May 2026 at £19,989. Its asking price is now £17,989, £2,000 less. The latest price cut was seen on 28 September 2026.

Price changes recorded:

• 29 May 2026: £19,989
• 1 June 2026: £19,789
• 3 July 2026: £19,489
• 30 July 2026: £18,989
• 23 September 2026: £18,489
• 28 September 2026: £17,989

Mileage and MOT

MOT, from the government's MOT records (DVSA, the Driver and Vehicle Standards Agency), as of 2 November 2026: valid until 14 December 2026.

It has had 3 MOTs. The latest, on 8 December 2025, passed.

Advisories at the latest test: chip to windscreen.

Mileage at that test: 67,597 miles, which matches the advertised 71,018 miles.

Advertised mileage is about 29,000 miles higher than the median mileage of a 2021 Audi Q3 on AskCar.

Similar cars

22 other 2021 Audi Q3 S Line 2.0 diesel automatic SUVs are for sale at UK dealers, from £13,990 to £23,500, as of 2 November 2026.

The 3 closest to this car in mileage:

• 2021 Audi Q3 S Line, 2.0 diesel SUV, white. Mileage: 70,000 miles. Price: £21,445, £3,456 more than this car. Dealer: Morgan Cars and Commercials in Ballyclare. AskCar page: https://askcar.co.uk/car/audi-q3-2021-a05bf45d0483
• 2021 Audi Q3 S Line, 2.0 diesel SUV, silver. Mileage: 66,000 miles. Price: £22,995, £5,006 more than this car. Dealer: Bank Motors in Glasgow. AskCar page: https://askcar.co.uk/car/audi-q3-2021-1610110d9431
• 2021 Audi Q3 S Line, 2.0 diesel SUV, grey. Mileage: 65,250 miles. Price: £20,945, £2,956 more than this car. Dealer: Morgan Cars and Commercials in Ballyclare. AskCar page: https://askcar.co.uk/car/audi-q3-2021-09aaf788f793

• The nearest: 2021 Audi Q3 S Line, 2.0 diesel SUV, black, 13 miles from this car. Mileage: 61,900 miles. Price: £19,990, £2,001 more than this car. Dealer: Prestige Cars Of Essex in Harlow. AskCar page: https://askcar.co.uk/car/audi-q3-2021-f0e9100aab19