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: 23,548 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

With 23,548 miles on the clock, this 2023 Audi A3 S Line has done roughly 3,200 fewer miles than a typical 2023 Audi A3. Its asking price of £20,630 is £567 below the AskCar estimate of £21,197. The AskCar estimate uses 6,620 UK dealer adverts for the Audi A3, with adjustments for age, mileage, trim, engine and other specifications. It first appeared in our advert records 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 8 November 2026.

How we estimate prices and check cars

Price

Fair price: £567 (2%) under the AskCar estimate of £21,197.

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 6,620 priced Audi A3 adverts across different ages and specifications, as of 8 November 2026.

A 2023 Audi A3 with the 1.5 petrol engine is typically advertised at £20,500: the median of the 510 for sale on AskCar, as of 8 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: 1,075 of the 2,122 first advertised between 8 July 2026 and 5 October 2026.

Price history

AskCar first saw this advert on 8 November 2026 at £20,630. 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 8 November 2026: valid until 30 October 2027.

It failed its MOT on 9 October 2026 (offside front inner tyre has ply or cords damaged deep cut) and passed later the same day.

Advisories at the latest test: rear registration plate insecure but not likely to fall off; nearside rear tyre has a cut but not deep enough to reach the ply or cords.

Mileage at that test: 23,238 miles, which matches the advertised 23,548 miles.

Advertised mileage is about 3,200 miles lower than the median mileage of a 2023 Audi A3 on AskCar.

Similar cars

137 other 2023 Audi A3 S Line 1.5 petrol automatic hatchbacks are for sale at UK dealers, from £16,930 to £24,670, as of 8 November 2026.

The 3 closest to this car in mileage:

• 2023 Audi A3 S Line, 1.5 petrol hatchback, red. Mileage: 23,407 miles. Price: £21,650, £1,020 more than this car. Dealer: Group 1 Automotive Chelmsford Audi in Chelmsford. AskCar page: https://askcar.co.uk/car/audi-a3-2023-3e428bc3bdd3
• 2023 Audi A3 S Line, 1.5 petrol hatchback, white. Mileage: 23,283 miles. Price: £20,980, £350 more than this car. Dealer: Swansway Garages Carlisle Audi in Carlisle. AskCar page: https://askcar.co.uk/car/audi-a3-2023-45753358f4e5
• 2023 Audi A3 S Line, 1.5 petrol hatchback, grey. Mileage: 23,875 miles. Price: £21,998, £1,368 more than this car. Dealer: Arnold Clark Ayr BYD in Prestwick. AskCar page: https://askcar.co.uk/car/audi-a3-2023-45c283f16d5c

• The nearest: 2023 Audi A3 S Line, 1.5 petrol hatchback, white, under a mile from this car. Mileage: 30,436 miles. Price: £19,460, £1,170 less than this car. Dealer: Big Motoring World Peterborough in Peterborough. AskCar page: https://askcar.co.uk/car/audi-a3-2023-85b3f88d8a69