2021 Audi A3
1.5 TFSI 35 S Line S tronic FWD Euro 6 (s/s) 5dr Sportback (148 bhp)
£19,849
Fair price: within 8% of the typical £20,321 for this model, age and mileage, drawing on 6,484 adverts of this make and model.
Overview
- Make
- Audi
- Model
- A3
- Trim
- S LINE
- Version
- 1.5 TFSI 35 S Line S tronic FWD Euro 6 (s/s) 5dr Sportback (148 bhp)
- Mileage
- 21,500 miles
- Year
- 2021
- Fuel type
- Petrol Hybrid
- Body type
- Hatchback
- Engine
- 1.5 L
- Gearbox
- Automatic
- Power
- 148 bhp
- Seats
- 5
- CO2
- 135 g/km
- Colour
- White
- Doors
- 5
- Driven wheels
- Front Wheel Drive
- Gearbox version
- S tronic
- Engine badge
- TFSI
- Hybrid type
- Mild hybrid
- Emissions standard
- Euro 6
About this car
This 2021 Audi A3 S Line is advertised with 21,500 miles, approximately 21,300 below the typical mileage for its age. At £19,849, it is advertised £472 below our estimated market asking price of £20,321. To estimate its market asking price, we analyse UK dealer adverts for 6,484 Audi A3 cars across different ages and specifications. Since we first spotted the advert 18 days ago, the asking price has dropped by £100. Its recorded MOT is valid until 12 April 2027, and its advertised mileage is consistent with the latest MOT reading. The seller is Halliwell Jones Premium Trade Cars Southport, based in Southport.
Stock data from 19 October 2026.
Price history
First seen on 2 October 2026, 18 days ago. Advert duration calculated on 20 October 2026. Net asking-price reduction: £100 from the first recorded £19,949. 3 price reductions recorded, the latest observed on 16 October 2026.
| Date observed | Asking price |
|---|---|
| 2 October 2026 | £19,949 |
| 6 October 2026 | £19,929 |
| 11 October 2026 | £19,899 |
| 16 October 2026 | £19,849 |
| 19 October 2026 | £19,849 |
Price and mileage comparison
Estimated market asking price: £20,321. The asking price is £472 below this estimate.
The estimate uses UK dealer asking prices, accounting for make, model, trim, version, age, mileage, fuel, gearbox, body type, driven wheels, engine size and power. It estimates an advertised price, not a confirmed sale price.
The pricing calculation includes 6,484 adverts of this make and model across different ages and specifications.
Advertised mileage is approximately 21,300 miles lower than typical for a 2021 Audi A3.
The advertised mileage is consistent with the last MOT reading.
MOT
MOT valid until 12 April 2027. 18,912 miles at the last test.
97 other cars with the same year, trim, gearbox and fuel are for sale from £11,995 to £21,995.
| Asking price | Mileage |
|---|---|
| £11,995 | 120,530 miles |
| £12,490 | 111,668 miles |
| £12,999 | 57,000 miles |
| £13,490 | 108,000 miles |
| £13,700 | 96,353 miles |
These cars have covered 12,650–120,530 miles, compared with 21,500 miles for this car.
Matching year, trim, gearbox and fuel does not mean matching mileage or every specification. Our estimate adjusts for these differences using the wider market data.
Browse all Audi A3 cars for sale · 2021 Audi A3 price guide
Similar cars for less
- 2023 Audi A3, 7,500 miles, £16,989, £5,178 under typical, Keighley
- 2025 Audi A3, 13,000 miles, £19,795, £6,032 under typical, Wakefield
- 2024 Audi A3, 18,500 miles, £17,450, £5,086 under typical, Halifax
Dealer
Halliwell Jones Premium Trade Cars Southport, Southport. Across the dealer network: 13 branches, 683 cars for sale.
Dealer postcode: PR8 5JF.
Dealer opening hours
- Monday
- 08:30-18:00
- Tuesday
- 08:30-18:00
- Wednesday
- 08:30-18:00
- Thursday
- 08:30-18:00
- Friday
- 08:30-18:00
- Saturday
- 09:00-17:00
- Sunday
- Closed
