2021 Audi A3 2.0 TDI S Line
Price: £15,950. Above the going rate: £2,180 (15%) over the AskCar estimate of £13,770, our expected asking price for this car from its model, age, mileage and specification, drawing on 6,645 priced Audi A3 adverts on AskCar as of 5 November 2026.
AskCar lists 6,826 used Audi A3 from 2,317 UK dealerships, as of 5 November 2026.
Overview
- Make: Audi
- Model: A3
- Trim: S Line
- Version: 2.0 TDI 35 S Line S tronic FWD Euro 6 (s/s) 5dr Sportback (148 bhp)
- Year: 2021
- Mileage: 93,000 miles
- Fuel: Diesel
- Body: Hatchback, 5 doors, 5 seats
- Engine: 2.0 litres, 148 bhp
- Gearbox: Automatic (S tronic)
- Drive: Front-wheel drive
- Colour: Blue
- CO2: 127 g/km
- Emissions standard: Euro 6, ULEZ compliant
About this car
This 2021 Audi A3 S Line is advertised with 93,000 miles, approximately 50,400 above the typical mileage for its age. The AskCar estimate for this car is £13,770. It is priced at £15,950, which is £2,180 above that estimate. To work out the AskCar estimate, we analyse UK dealer adverts for 6,645 Audi A3 cars across different ages and specifications. It first appeared in our advert records 19 days ago. We checked its advertised mileage against the government's MOT record, and they match. You can find this car at MC Autosales in Magherafelt. How to contact the dealer and its opening hours are on this AskCar page.
Stock data as of 5 November 2026.
Price
Above the going rate: £2,180 (15%) over the AskCar estimate of £13,770.
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 6,645 priced Audi A3 adverts across different ages and specifications, as of 5 November 2026.
A 2021 Audi A3 with the 2.0 diesel engine is typically advertised at £18,000: the median of the 47 for sale on AskCar, as of 5 November 2026.
Time on sale
This 2021 Audi A3 has been on sale for at least 19 days.
Price history
AskCar first saw this advert on 17 October 2026 at £15,950. 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 5 November 2026: valid until 9 March 2027.
It has had 3 MOTs. The latest, on 10 March 2025, passed.
There were no advisories at the latest test.
Mileage at that test: 63,830 miles, which matches the advertised 93,000 miles.
Advertised mileage is about 50,400 miles higher than the median mileage of a 2021 Audi A3 on AskCar.
Similar cars
5 other 2021 Audi A3 S Line 2.0 diesel automatic hatchbacks are for sale at UK dealers, from £17,400 to £18,520, as of 5 November 2026.
The 3 closest to this car in mileage:
- 2021 Audi A3 S Line, 2.0 diesel hatchback, white. Mileage: 45,833 miles. Price: £17,400, £1,450 more than this car. Dealer: Essex Car Company in Rainham. AskCar page: https://askcar.co.uk/car/audi-a3-2021-05a9f027fafc
- 2021 Audi A3 S Line, 2.0 diesel hatchback, black. Mileage: 44,495 miles. Price: £17,490, £1,540 more than this car. Dealer: Barlow Motors Crewe Skoda in Crewe. AskCar page: https://askcar.co.uk/car/audi-a3-2021-ea0fc4041912
- 2021 Audi A3 S Line, 2.0 diesel hatchback, white. Mileage: 43,744 miles. Price: £18,000, £2,050 more than this car. Dealer: Sytner Group West London Audi in London. AskCar page: https://askcar.co.uk/car/audi-a3-2021-faa149fc5438
Browse all Audi A3 cars for sale · 2021 Audi A3 price guide
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Photos
12 photos of this car are on its AskCar page.
As of 5 November 2026, AskCar lists 595,776 cars and vans from 12,945 UK dealerships, read daily from dealer websites: over 99% of UK dealer used car adverts. No dealer pays to be listed.