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: 29,913 miles
• Fuel: Diesel
• Body: SUV, 5 doors, 5 seats
• Engine: 2.0 litres, 197 bhp
• Gearbox: Automatic (S tronic)
• Drive: Four-wheel drive
• Colour: Black
• CO2: 174 g/km
• Emissions standard: Euro 6, ULEZ compliant

About this car

This 2021 Audi Q3 S Line is advertised with 29,913 miles, approximately 12,100 below the typical mileage for its age. The dealer is asking £22,317, which is £1,853 below the AskCar estimate of £24,170. To work out the AskCar estimate, we analyse UK dealer adverts for 3,432 Audi Q3 cars across different ages and specifications. We first saw this car advertised 158 days ago. Its asking price has since fallen by £2,683. According to the government's MOT record, its advertised mileage is consistent with the latest test. The seller is JCT600 Boston Audi, based in Boston. 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: £1,853 (7%) under the AskCar estimate of £24,170.

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 £25,000. Its asking price is now £22,317, £2,683 less. The latest price cut was seen on 31 October 2026.

Price changes recorded:

• 28 May 2026: £25,000
• 4 June 2026: £24,750
• 16 June 2026: £24,500
• 21 June 2026: £24,600
• 4 July 2026: £24,500
• 19 July 2026: £24,396
• 22 July 2026: £24,625
• 31 July 2026: £24,425
• 4 August 2026: £24,630
• 10 August 2026: £24,089
• 16 August 2026: £23,377
• 22 August 2026: £23,277
• 27 August 2026: £22,750
• 1 September 2026: £22,521
• 15 September 2026: £22,421
• 24 September 2026: £23,069
• 29 September 2026: £22,865
• 7 October 2026: £22,689
• 14 October 2026: £22,391
• 23 October 2026: £22,161
• 28 October 2026: £22,103
• 31 October 2026: £21,928
• 1 November 2026: £22,317

Mileage and MOT

MOT, from the government's MOT records (DVSA, the Driver and Vehicle Standards Agency), as of 2 November 2026: valid until 8 January 2027.

It has had 3 MOTs. The latest, on 5 January 2026, passed.

Advisories at the latest test: nearside rear tyre worn close to legal limit/worn on edge; offside rear tyre worn close to legal limit/worn on edge.

Mileage at that test: 27,589 miles, which matches the advertised 29,913 miles.

Advertised mileage is about 12,100 miles lower 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, blue. Mileage: 33,714 miles. Price: £20,150, £2,167 less 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: 40,000 miles. Price: £19,990, £2,327 less than this car. Dealer: Monarch Motor Company in Redditch. AskCar page: https://askcar.co.uk/car/audi-q3-2021-f22f0b3b376c
• 2021 Audi Q3 S Line, 2.0 diesel SUV, grey. Mileage: 40,326 miles. Price: £18,651, £3,666 less than this car. Dealer: Quality Part X Dunstable in Dunstable. AskCar page: https://askcar.co.uk/car/audi-q3-2021-77e2da1d904f

• The nearest: 2021 Audi Q3 S Line, 2.0 diesel SUV, white, 30 miles from this car. Mileage: 118,000 miles. Price: £13,990, £8,327 less than this car. Dealer: Motorland in Peterborough. AskCar page: https://askcar.co.uk/car/audi-q3-2021-9fd36734d4d2