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: 18,423 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

With 18,423 miles on the clock, this 2023 Audi A3 S Line has done roughly 8,600 fewer miles than a typical 2023 Audi A3. The dealer is asking £22,990, which is £478 above the AskCar estimate of £22,512. To work out the AskCar estimate, we analyse UK dealer adverts for 6,542 Audi A3 cars across different ages and specifications. This car was first seen in our listings data 3 days ago. According to the government's MOT record, its advertised mileage is consistent with the latest test. The seller is Stratstone Milton Keynes Audi, based in Milton Keynes. 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: £478 (2%) over the AskCar estimate of £22,512.

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 3 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 30 October 2026 at £22,990. 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 27 October 2027.

It has had one MOT, on 28 October 2026, and passed.

There were no advisories at the latest test.

Mileage at that test: 18,426 miles, which matches the advertised 18,423 miles.

Advertised mileage is about 8,600 miles lower 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, white. Mileage: 18,596 miles. Price: £22,698, £292 less than this car. Dealer: Group 1 Automotive Audi Approved Colchester in Colchester. AskCar page: https://askcar.co.uk/car/audi-a3-2023-6263aeee195b
• 2023 Audi A3 S Line, 1.5 petrol saloon, black. Mileage: 18,931 miles. Price: £22,490, £500 less than this car. Dealer: Swansway Garages Crewe Audi in Crewe. AskCar page: https://askcar.co.uk/car/audi-a3-2023-e5bc54657ef5
• 2023 Audi A3 S Line, 1.5 petrol saloon, white. Mileage: 17,499 miles. Price: £21,799, £1,191 less than this car. Dealer: Freewheel Autos in Chorley. AskCar page: https://askcar.co.uk/car/audi-a3-2023-4fe4352c2b9e

• The nearest: 2023 Audi A3 S Line, 1.5 petrol saloon, grey, under a mile from this car. Mileage: 27,861 miles. Price: £22,390, £600 less than this car. Dealer: Stratstone Milton Keynes Audi in Milton Keynes. AskCar page: https://askcar.co.uk/car/audi-a3-2023-c4c619564788