2021 Audi A3

1.0 TFSI 30 S Line Manual FWD Euro 6 (s/s) 4dr (108 bhp)

£16,798

Fair price: within 8% of the typical £17,654 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: 1.0 TFSI 30 S Line Manual FWD Euro 6 (s/s) 4dr (108 bhp)
Mileage: 21,909 miles
Year: 2021
Fuel type: Petrol
Body type: Saloon
Engine: 1.0 L
Gearbox: Manual
Power: 108 bhp
Seats: 5
CO2: 128 g/km
Colour: Grey
Doors: 4
Driven wheels: Front Wheel Drive
Engine badge: TFSI
Emissions standard: Euro 6

About this car

This 2021 Audi A3 S Line is advertised with 21,909 miles, approximately 20,900 below the typical mileage for its age. The dealer is asking £16,798, which is £856 below our market estimate of £17,654. Our estimate draws on 6,484 Audi A3 adverts across the UK, adjusting for age, mileage, trim, engine and other specifications. We first saw this car advertised 28 days ago. Its asking price has since fallen by £200. MOT records show an expiry date of 26 August 2027, and the latest recorded mileage is consistent with the advert. The seller is CarSupermarket.com Lincoln, based in Lincoln.

Stock data from 19 October 2026.

How we estimate prices and check cars

Price history

First seen on 22 September 2026, 28 days ago. Advert duration calculated on 20 October 2026. Net asking-price reduction: £200 from the first recorded £16,998. 1 price reduction recorded, the latest observed on 6 October 2026.

Recorded asking prices
Date observed	Asking price
22 September 2026	£16,998
6 October 2026	£16,798
19 October 2026	£16,798

Price and mileage comparison

Estimated market asking price: £17,654. The asking price is £856 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 20,900 miles lower than typical for a 2021 Audi A3.

The advertised mileage is consistent with the last MOT reading.

MOT

MOT valid until 26 August 2027. 21,908 miles at the last test.

52 other cars with the same year, trim, gearbox and fuel are for sale from £12,936 to £20,402.

Other matching cars (up to five, cheapest first)
Asking price	Mileage
£12,936	83,041 miles
£12,995	84,920 miles
£13,999	78,694 miles
£14,427	52,604 miles
£14,495	71,881 miles

These cars have covered 7,591–84,920 miles, compared with 21,909 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

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Dealer

CarSupermarket.com Lincoln, Lincoln. Across the dealer network: 14 branches, 1,330 cars for sale.

Dealer postcode: LN5 8NU.