2021 Audi A3

2.0 TDI 35 S Line S tronic FWD Euro 6 (s/s) 5dr Sportback (148 bhp)

£18,500

Fair price: within 8% of the typical £19,072 for this model, age and mileage, drawing on 6,542 adverts of this make and model.

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)
Mileage
43,744 miles
Year
2021
Fuel type
Diesel
Body type
Hatchback
Engine
2.0 L
Gearbox
Automatic
Power
148 bhp
Seats
5
CO2
127 g/km
Colour
White
Doors
5
Driven wheels
Front Wheel Drive
Gearbox version
S tronic
Engine badge
TDI
Emissions standard
Euro 6

About this car

The advertised mileage for this 2021 Audi A3 S Line is 43,744 miles. At £18,500, it is advertised £572 below our estimated market asking price of £19,072. To estimate its market asking price, we analyse UK dealer adverts for 6,542 Audi A3 cars across different ages and specifications. We first recorded this advert 41 days ago, and its asking price has since fallen by £1,000. The latest MOT record shows an expiry date of 14 May 2027, with the advertised mileage consistent with the recorded reading. It is for sale at Sytner Group West London Audi in Brentford.

Stock data from 21 October 2026.

How we estimate prices and check cars

Price history

First seen on 12 September 2026, 41 days ago. Advert duration calculated on 23 October 2026. Net asking-price reduction: £1,000 from the first recorded £19,500. 2 price reductions recorded, the latest observed on 17 October 2026.

Recorded asking prices
Date observedAsking price
12 September 2026£19,500
13 October 2026£18,750
17 October 2026£18,500
21 October 2026£18,500

Price and mileage comparison

Estimated market asking price: £19,072. The asking price is £572 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 6,542 adverts of this make and model across different ages and specifications.

Advertised mileage is approximately 700 miles higher than typical for a 2021 Audi A3.

The advertised mileage is consistent with the last MOT reading.

MOT

MOT valid until 14 May 2027. 40,774 miles at the last test.

8 other cars with the same year, trim, gearbox and fuel are for sale from £15,650 to £18,500.

Other matching cars (up to five, cheapest first)
Asking priceMileage
£15,65063,113 miles
£15,95093,000 miles
£16,49571,923 miles
£16,80050,311 miles
£17,40045,833 miles

These cars have covered 25,000–93,000 miles, compared with 43,744 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

How to contact the dealer, its opening hours and the cheaper cars like this one are on this AskCar page.

Vehicle photos