2021 Audi A3

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

18,246 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

Grey

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 has covered 18,246 miles, around 24,500 fewer than typical for its age. At £19,579, it is advertised £1,059 below our estimated market asking price of £20,638. To estimate its market asking price, we analyse UK dealer adverts for 6,484 Audi A3 cars across different ages and specifications. We first recorded this advert 137 days ago, and its asking price has since fallen by £1,420. That may be worth mentioning if you discuss the price with the dealer. Its recorded MOT is valid until 21 April 2027, and its advertised mileage is consistent with the latest MOT reading. It is for sale at Days Motorpark in Swansea.

Stock data from 19 October 2026.

How we estimate prices and check cars

Price and mileage comparison

Estimated market asking price: £20,638. The asking price is £1,059 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 24,500 miles lower than typical for a 2021 Audi A3.

The advertised mileage is consistent with the last MOT reading.