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: 20,235 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: Blue
• CO2: 135 g/km
• Emissions standard: Euro 6, ULEZ compliant

About this car

This 2023 Audi A3 S Line is advertised with 20,235 miles, approximately 6,800 below the typical mileage for its age. The dealer is asking £20,820, which is £559 below the AskCar estimate of £21,379. To work out the AskCar estimate, we analyse UK dealer adverts for 6,763 Audi A3 cars across different ages and specifications. This car was first seen in our listings data today. According to the government's MOT record, its advertised mileage is consistent with the latest test. The seller is Big Motoring World Peterborough, based in Peterborough. How to contact the dealer and its opening hours are on this AskCar page.

Stock data as of 14 November 2026.

How we estimate prices and check cars

Price

Fair price: £559 (2%) under the AskCar estimate of £21,379.

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 6,763 priced Audi A3 adverts across different ages and specifications, as of 14 November 2026.

A 2023 Audi A3 with the 1.5 petrol engine is typically advertised at £20,500: the median of the 514 for sale on AskCar, as of 14 November 2026.

Time on sale

AskCar first saw this 2023 Audi A3 advertised today. About half of 2023 Audi A3 cars are gone from sale within a month of being advertised: 1,114 of the 2,238 first advertised between 14 July 2026 and 11 October 2026.

Price history

AskCar first saw this advert on 14 November 2026 at £20,820. 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 14 November 2026: valid until 30 October 2027.

It has had one MOT, on 30 October 2026, and passed.

There were no advisories at the latest test.

Mileage at that test: 20,090 miles, which matches the advertised 20,235 miles.

Advertised mileage is about 6,800 miles lower than the median mileage of a 2023 Audi A3 on AskCar.

Similar cars

143 other 2023 Audi A3 S Line 1.5 petrol automatic hatchbacks are for sale at UK dealers, from £17,660 to £24,670, as of 14 November 2026.

The 3 closest to this car in mileage:

• 2023 Audi A3 S Line, 1.5 petrol hatchback, white. Mileage: 20,212 miles. Price: £19,999, £821 less than this car. Dealer: HPL Wirral in Bromborough. AskCar page: https://askcar.co.uk/car/audi-a3-2023-e476e63a5bea
• 2023 Audi A3 S Line, 1.5 petrol hatchback, blue. Mileage: 20,026 miles. Price: £20,990, £170 more than this car. Dealer: Days Motorpark Cardiff in Cardiff. AskCar page: https://askcar.co.uk/car/audi-a3-2023-949e3c0edab4
• 2023 Audi A3 S Line, 1.5 petrol hatchback, white. Mileage: 20,661 miles. Price: £22,490, £1,670 more than this car. Dealer: Phantom Motor Company in Hindley Green. AskCar page: https://askcar.co.uk/car/audi-a3-2023-7e74188d1c30

• The nearest: 2023 Audi A3 S Line, 1.5 petrol hatchback, white, under a mile from this car. Mileage: 30,436 miles. Price: £19,380, £1,440 less than this car. Dealer: Big Motoring World Peterborough in Peterborough. AskCar page: https://askcar.co.uk/car/audi-a3-2023-85b3f88d8a69