2021 Audi A3 1.5 TFSI S Line
Version: 1.5 TFSI 35 S Line Manual FWD Euro 6 (s/s) 5dr Sportback (148 bhp)
Price: £17,599. Fair price: £425 (2%) under the AskCar estimate of £18,024, our expected asking price for this car from its model, age, mileage and specification, drawing on 6,475 priced Audi A3 adverts on AskCar as of 30 October 2026.
AskCar lists 6,654 used Audi A3 from 2,240 UK dealerships, as of 30 October 2026.
Overview
- Make
- Audi
- Model
- A3
- Trim
- S Line
- Version
- 1.5 TFSI 35 S Line Manual FWD Euro 6 (s/s) 5dr Sportback (148 bhp)
- Mileage
- 26,584 miles
- Year
- 2021
- Fuel type
- Petrol
- Body type
- Hatchback
- Engine
- 1.5 L
- Gearbox
- Manual
- Power
- 148 bhp
- Seats
- 5
- CO2
- 136 g/km
- Colour
- Black
- Doors
- 5
- Driven wheels
- Front Wheel Drive
- Engine badge
- TFSI
- Emissions standard
- Euro 6
About this car
With 26,584 miles on the clock, this 2021 Audi A3 S Line has done roughly 16,900 fewer miles than a typical 2021 Audi A3. Its asking price of £17,599 is £425 below the AskCar estimate of £18,024. The AskCar estimate uses 6,475 UK dealer adverts for the Audi A3, with adjustments for age, mileage, trim, engine and other specifications. We have tracked this advert today. The latest MOT record shows an expiry date of 21 October 2027, with the advertised mileage consistent with the recorded reading. You can find this car at cinch Corby in North Northamptonshire.
Stock data as of 30 October 2026.
Price history
AskCar first saw this advert on 30 October 2026.
| Date observed | Asking price |
|---|---|
| 30 October 2026 | £17,599 |
Price and mileage comparison
Fair price: £425 (2%) under the AskCar estimate of £18,024.
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 6,475 priced Audi A3 adverts across different ages and specifications, as of 30 October 2026.
Advertised mileage is about 16,900 miles lower than the median mileage of a 2021 Audi A3 on AskCar.
The advertised mileage is consistent with the last MOT reading.
MOT
MOT: valid until 21 October 2027. 26,581 miles at the last test.
Other matching cars
45 other 2021 Audi A3 S Line manual petrol cars are for sale at UK dealers from £12,895 to £18,490, as of 30 October 2026.
The 5 cheapest:
- 2021 Audi A3. Price: £12,895. Mileage: 84,920 miles. Dealer: V12 Sports & Classics Ltd - Hinckley in Hinckley. AskCar page: https://askcar.co.uk/car/audi-a3-2021-c65172f88ab9
- 2021 Audi A3. Price: £13,299. Mileage: 78,694 miles. Dealer: cinch Corby in Corby. AskCar page: https://askcar.co.uk/car/audi-a3-2021-6e1684e6a503
- 2021 Audi A3. Price: £14,200. Mileage: 52,604 miles. Dealer: Carsa Cannock in Cannock. AskCar page: https://askcar.co.uk/car/audi-a3-2021-4b020f66a307
- 2021 Audi A3. Price: £14,495. Mileage: 71,881 miles. Dealer: Simpson Motors in Dunfermline. AskCar page: https://askcar.co.uk/car/audi-a3-2021-8d006f3aef1a
- 2021 Audi A3. Price: £14,750. Mileage: 42,111 miles. Dealer: Sytner Select Northampton in Northampton. AskCar page: https://askcar.co.uk/car/audi-a3-2021-e262a5b8a44a
The 45 matching cars have covered 17,350 to 84,920 miles, compared with 26,584 miles for this car.
Matching year, trim, gearbox and fuel does not mean matching mileage or every specification. The AskCar estimate adjusts for these differences.
Browse all Audi A3 cars for sale · 2021 Audi A3 price guide
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Photos
29 photos of this car are on its AskCar page.
How to contact the dealer and its opening hours are on this AskCar page.
As of 30 October 2026, AskCar lists 580,490 cars and vans from 12,695 UK dealerships, read daily from dealer websites: over 99% of UK dealer used car adverts. No dealer pays to be listed.