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) 5dr Sportback (148 bhp)
• Year: 2023
• Mileage: 21,601 miles
• Fuel: Petrol, mild hybrid
• Body: Hatchback, 5 doors, 5 seats
• Engine: 1.5 litres, 148 bhp
• Gearbox: Automatic (S tronic)
• Drive: Front-wheel drive
• Colour: Grey
• CO2: 135 g/km
• Emissions standard: Euro 6, ULEZ compliant

About this car

At 21,601 miles, this 2023 Audi A3 S Line has covered about 5,400 fewer miles than other 2023 Audi A3 cars. The AskCar estimate for this car is £21,640. It is priced at £21,000, which is £640 below that estimate. The AskCar estimate uses UK dealer asking prices, including 6,542 Audi A3 adverts, and accounts for the car’s age, mileage and specification. Since we first spotted the advert 33 days ago, the asking price has dropped by £1,000. According to the government's MOT record, its advertised mileage is consistent with the latest test. The seller is Mon Motors Cardiff Audi, based in Cardiff. 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: £640 (2%) under the AskCar estimate of £21,640.

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

This 2023 Audi A3 has been on sale for at least 33 days.

Price history

AskCar first saw this advert on 30 September 2026 at £22,000. Its asking price is now £21,000, £1,000 less. The latest price cut was seen on 31 October 2026.

Price changes recorded:

• 30 September 2026: £22,000
• 16 October 2026: £21,990
• 20 October 2026: £21,850
• 31 October 2026: £21,000

Mileage and MOT

MOT, from the government's MOT records (DVSA, the Driver and Vehicle Standards Agency), as of 2 November 2026: valid until 24 September 2027.

It has had one MOT, on 25 September 2026, and passed.

Advisories at the latest test: rear tyre slightly damaged/cracking or perishing both sides; nearside rear tyre worn close to legal limit/worn on edge.

Mileage at that test: 21,577 miles, which matches the advertised 21,601 miles.

Advertised mileage is about 5,400 miles lower than the median mileage of a 2023 Audi A3 on AskCar.

Similar cars

128 other 2023 Audi A3 S Line 1.5 petrol automatic hatchbacks are for sale at UK dealers, from £16,195 to £24,670, as of 2 November 2026.

The 3 closest to this car in mileage:

• 2023 Audi A3 S Line, 1.5 petrol hatchback, white. Mileage: 21,542 miles. Price: £21,499, £499 more than this car. Dealer: cinch Corby in Corby. AskCar page: https://askcar.co.uk/car/audi-a3-2023-85b6a27a3db4
• 2023 Audi A3 S Line, 1.5 petrol hatchback, blue. Mileage: 21,500 miles. Price: £21,300, £300 more than this car. Dealer: Stratstone Amersham Audi in Amersham. AskCar page: https://askcar.co.uk/car/audi-a3-2023-c69fdc066d06
• 2023 Audi A3 S Line, 1.5 petrol hatchback, grey. Mileage: 21,179 miles. Price: £20,795, £205 less than this car. Dealer: Witham Garage in Melton Mowbray. AskCar page: https://askcar.co.uk/car/audi-a3-2023-25e94a91a42c

• The nearest: 2023 Audi A3 S Line, 1.5 petrol hatchback, black, 8 miles from this car. Mileage: 29,239 miles. Price: £20,999, the same price as this car. Dealer: Motorplus South Wales in Newport. AskCar page: https://askcar.co.uk/car/audi-a3-2023-59112669dc76