2021 Audi Q3 2.0 TDI S Line

Overview

• Make: Audi
• Model: Q3
• Trim: S Line
• Version: 2.0 TDI 35 S Line S tronic 4WD Euro 6 (s/s) 5dr (148 bhp)
• Year: 2021
• Mileage: 56,264 miles
• Fuel: Diesel
• Body: SUV, 5 doors, 5 seats
• Engine: 2.0 litres, 148 bhp
• Gearbox: Automatic (S tronic)
• Drive: Four-wheel drive
• Colour: White
• CO2: 164 g/km
• Emissions standard: Euro 6, ULEZ compliant

About this car

At 56,264 miles, this 2021 Audi Q3 S Line has covered about 14,300 more miles than other 2021 Audi Q3 cars. Priced at £19,998, it is advertised £1,122 below the AskCar estimate of £21,120. The AskCar estimate uses UK dealer asking prices, including 3,432 Audi Q3 adverts, and accounts for the car’s age, mileage and specification. This car was first seen in our listings data 5 days ago. Its advertised mileage matches the government's MOT record. The seller is Arnold Clark Dundee Vauxhall / Fiat / Abarth, based in Dundee. 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: £1,122 (5%) under the AskCar estimate of £21,120.

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

AskCar first saw this 2021 Audi Q3 advertised 5 days ago. About half of 2021 Audi Q3 cars are gone from sale within a month of being advertised: 179 of the 362 first advertised between 8 July 2026 and 29 September 2026.

Price history

AskCar first saw this advert on 28 October 2026 at £19,998. 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 2 November 2026: valid until 31 July 2027.

It has had 3 MOTs. The latest, on 20 July 2026, passed.

There were no advisories at the latest test.

Mileage at that test: 54,821 miles, which matches the advertised 56,264 miles.

Advertised mileage is about 14,300 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, black. Mileage: 57,000 miles. Price: £21,795, £1,797 more than this car. Dealer: Moy Auto Services in Dungannon. AskCar page: https://askcar.co.uk/car/audi-q3-2021-b46b23693b1a
• 2021 Audi Q3 S Line, 2.0 diesel SUV, black. Mileage: 61,900 miles. Price: £19,990, the same price as this car. Dealer: Prestige Cars Of Essex in Harlow. AskCar page: https://askcar.co.uk/car/audi-q3-2021-f0e9100aab19
• 2021 Audi Q3 S Line, 2.0 diesel SUV, white. Mileage: 62,895 miles. Price: £20,290, £292 more than this car. Dealer: Fermanagh Auto Sales in Enniskillen. AskCar page: https://askcar.co.uk/car/audi-q3-2021-370f2a4406de

• The nearest: 2021 Audi Q3 S Line, 2.0 diesel SUV, white, 62 miles from this car. Mileage: 102,770 miles. Price: £14,899, £5,099 less than this car. Dealer: Audi Technik Centre in Glasgow. AskCar page: https://askcar.co.uk/car/audi-q3-2021-7d4bbf082851