2023 Audi A3 1.5 TFSI S Line

Overview

• Make: Audi
• Model: A3
• Trim: S Line
• Version: 1.5 TFSI 35 S Line S tronic FWD Euro 6 (s/s) 4dr (148 bhp)
• Year: 2023
• Mileage: 28,734 miles
• Fuel: Petrol, mild hybrid
• Body: Saloon, 4 doors, 5 seats
• Engine: 1.5 litres, 148 bhp
• Gearbox: Automatic (S tronic)
• Drive: Front-wheel drive
• Colour: Grey
• CO2: 131 g/km
• Emissions standard: Euro 6, ULEZ compliant

About this car

This 2023 Audi A3 S Line is advertised with 28,734 miles on the clock. The dealer is asking £21,950, which is £418 above the AskCar estimate of £21,532. To work out the AskCar estimate, we analyse UK dealer adverts for 6,542 Audi A3 cars across different ages and specifications. We have tracked this advert for 5 days. Its advertised mileage matches the government's MOT record. The seller is Mon Motors Bristol Audi, based in Bristol. How to contact the dealer and its opening hours are on this AskCar page.

Stock data as of 2 November 2026.

How we estimate prices and check cars

Price

Fair price: £418 (1%) over the AskCar estimate of £21,532.

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 6,542 priced Audi A3 adverts across different ages and specifications, as of 2 November 2026.

A 2023 Audi A3 with the 1.5 petrol engine is typically advertised at £20,600: the median of the 493 for sale on AskCar, as of 2 November 2026.

Time on sale

AskCar first saw this 2023 Audi A3 advertised 5 days ago. About half of 2023 Audi A3 cars are gone from sale within a month of being advertised: 963 of the 1,886 first advertised between 8 July 2026 and 29 September 2026.

Price history

AskCar first saw this advert on 28 October 2026 at £21,950. Its asking price has not changed.

Mileage and MOT

MOT, from the government's MOT records (DVSA, the Driver and Vehicle Standards Agency), as of 2 November 2026: valid until 29 April 2027.

It failed its MOT on 25 April 2026 (nearside rear tyre tread depth below requirements of 1.6mm) and passed later the same day.

There were no advisories at the latest test.

Mileage at that test: 25,454 miles, which matches the advertised 28,734 miles.

Advertised mileage is about 1,700 miles higher than the median mileage of a 2023 Audi A3 on AskCar.

Similar cars

41 other 2023 Audi A3 S Line 1.5 petrol automatic saloons are for sale at UK dealers, from £16,290 to £24,499, as of 2 November 2026.

The 3 closest to this car in mileage:

• 2023 Audi A3 S Line, 1.5 petrol saloon, grey. Mileage: 27,861 miles. Price: £22,390, £440 more than this car. Dealer: Stratstone Milton Keynes Audi in Milton Keynes. AskCar page: https://askcar.co.uk/car/audi-a3-2023-c4c619564788
• 2023 Audi A3 S Line, 1.5 petrol saloon, grey. Mileage: 27,545 miles. Price: £20,995, £955 less than this car. Dealer: Rodden Road Cars in Frome. AskCar page: https://askcar.co.uk/car/audi-a3-2023-501e4fe13cf8
• 2023 Audi A3 S Line, 1.5 petrol saloon, grey. Mileage: 25,765 miles. Price: £20,399, £1,551 less than this car. Dealer: cinch in Doncaster. AskCar page: https://askcar.co.uk/car/audi-a3-2023-403a2cf02ad3