2021 Audi A3 2.0 TDI S Line
Price: £17,949. Fair price: £591 (3%) over the AskCar estimate of £17,358, our expected asking price for this car from its model, age, mileage and specification, drawing on 6,705 priced Audi A3 adverts on AskCar as of 12 November 2026.
AskCar lists 6,840 used Audi A3 from 2,317 UK dealerships, as of 12 November 2026.
Overview
- Make: Audi
- Model: A3
- Trim: S Line
- Version: 2.0 TDI 30 S Line Manual FWD Euro 6 (s/s) 5dr Sportback (114 bhp)
- Year: 2021
- Mileage: 41,496 miles
- Fuel: Diesel
- Body: Hatchback, 5 doors, 5 seats
- Engine: 2.0 litres, 114 bhp
- Gearbox: Manual
- Drive: Front-wheel drive
- Colour: White
- CO2: 122 g/km
- Emissions standard: Euro 6, ULEZ compliant
About this car
This 2021 Audi A3 S Line has covered 41,496 miles, around 2,100 fewer miles than is typical for its age. Priced at £17,949, it is advertised £591 above the AskCar estimate of £17,358. The AskCar estimate uses UK dealer asking prices, including 6,705 Audi A3 adverts, and accounts for the car’s age, mileage and specification. It first appeared in our advert records today. According to the government's MOT record, its advertised mileage is consistent with the latest test. The seller is Motorpoint Castleford, based in Castleford. How to contact the dealer and its opening hours are on this AskCar page.
Stock data as of 12 November 2026.
Motorpoint Castleford is rated 4.3 out of 5 on Google.
Price
Fair price: £591 (3%) over the AskCar estimate of £17,358.
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 6,705 priced Audi A3 adverts across different ages and specifications, as of 12 November 2026.
A 2021 Audi A3 with the 2.0 diesel engine is typically advertised at £17,500: the median of the 48 for sale on AskCar, as of 12 November 2026.
Time on sale
AskCar first saw this 2021 Audi A3 advertised today. About 6 in 10 of 2021 Audi A3 cars are gone from sale within a month of being advertised: 465 of the 830 first advertised between 12 July 2026 and 9 October 2026.
Price history
AskCar first saw this advert on 12 November 2026 at £17,949. 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 12 November 2026: valid until 28 April 2027.
It has had 3 MOTs. The latest, on 21 April 2026, passed.
Advisories at the latest test: nearside front tyre worn close to legal limit/worn on edge; offside front tyre worn close to legal limit/worn on edge.
Mileage at that test: 39,188 miles, which matches the advertised 41,496 miles.
Advertised mileage is about 2,100 miles lower than the median mileage of a 2021 Audi A3 on AskCar.
Similar cars
2 other 2021 Audi A3 S Line 2.0 diesel manual hatchbacks are for sale at UK dealers, from £16,470 to £20,768, as of 12 November 2026.
The 2 closest to this car in mileage:
- 2021 Audi A3 S Line, 2.0 diesel hatchback, white. Mileage: 48,687 miles. Price: £16,470, £1,479 less than this car. Dealer: Big Motoring World Norwich in Norwich. AskCar page: https://askcar.co.uk/car/audi-a3-2021-225f7bf97936
- 2021 Audi A3 S Line, 2.0 diesel hatchback, red. Mileage: 20,184 miles. Price: £20,768, £2,819 more than this car. Dealer: Lookers Audi Guildford in Guildford. AskCar page: https://askcar.co.uk/car/audi-a3-2021-0096e92549ea
Browse all Audi A3 cars for sale · 2021 Audi A3 price guide
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Photos
1 photo of this car is on its AskCar page.
As of 12 November 2026, AskCar lists 596,362 cars and vans from 12,840 UK dealerships, read daily from dealer websites: over 99% of UK dealer used car adverts. No dealer pays to be listed.