2018 Audi A3 1.5 TFSI S Line

Overview

• Make: Audi
• Model: A3
• Trim: S Line
• Version: 1.5 TFSI S Line S tronic FWD Euro 6 5dr (147 bhp)
• Year: 2018
• Mileage: 47,320 miles
• Fuel: Petrol
• Body: Hatchback, 5 doors, 5 seats
• Engine: 1.5 litres, 147 bhp
• Gearbox: Automatic (S tronic)
• Drive: Front-wheel drive
• Colour: Black
• CO2: 114 g/km
• Emissions standard: Euro 6, ULEZ compliant

About this car

This 2018 Audi A3 S Line has covered 47,320 miles, around 17,700 fewer miles than is typical for its age. Priced at £13,900, it is advertised £443 below the AskCar estimate of £14,343. The AskCar estimate uses 6,542 UK dealer adverts for the Audi A3, with adjustments for age, mileage, trim, engine and other specifications. Since we first spotted the advert 8 days ago, the asking price has dropped by £500. Its advertised mileage matches the government's MOT record. The seller is Sytner Select Cardiff, 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: £443 (3%) under the AskCar estimate of £14,343.

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 2018 Audi A3 with the 1.5 petrol engine is typically advertised at £12,200: the median of the 142 for sale on AskCar, as of 2 November 2026.

Time on sale

This 2018 Audi A3 has been on sale for at least 8 days.

Price history

AskCar first saw this advert on 25 October 2026 at £14,400. Its asking price is now £13,900, £500 less. The latest price cut was seen on 27 October 2026.

Price changes recorded:

• 25 October 2026: £14,400
• 27 October 2026: £13,900

Mileage and MOT

MOT, from the government's MOT records (DVSA, the Driver and Vehicle Standards Agency), as of 2 November 2026: valid until 19 October 2027.

It has had 6 MOTs. The latest, on 13 October 2026, passed.

There were no advisories at the latest test.

Mileage at that test: 47,166 miles, which matches the advertised 47,320 miles.

Advertised mileage is about 17,700 miles lower than the median mileage of a 2018 Audi A3 on AskCar.

Similar cars

21 other 2018 Audi A3 S Line 1.5 petrol automatic hatchbacks are for sale at UK dealers, from £9,695 to £15,995, as of 2 November 2026.

The 3 closest to this car in mileage:

• 2018 Audi A3 S Line, 1.5 petrol hatchback, grey. Mileage: 46,182 miles. Price: £13,990, £90 more than this car. Dealer: Swansway Garages Blackburn Audi in Blackburn. AskCar page: https://askcar.co.uk/car/audi-a3-2018-1756f1181940
• 2018 Audi A3 S Line, 1.5 petrol hatchback, grey. Mileage: 45,185 miles. Price: £13,560, £340 less than this car. Dealer: Hilton Garage in Derby. AskCar page: https://askcar.co.uk/car/audi-a3-2018-77f24c4a08a8
• 2018 Audi A3 S Line, 1.5 petrol hatchback, blue. Mileage: 50,758 miles. Price: £14,170, £270 more than this car. Dealer: Bluauto in Uckfield. AskCar page: https://askcar.co.uk/car/audi-a3-2018-eb25d48b3b0d

• The nearest: 2018 Audi A3 S Line, 1.5 petrol hatchback, white, under a mile from this car. Mileage: 51,536 miles. Price: £13,800, £100 less than this car. Dealer: Evans Halshaw Vauxhall Cardiff in Cardiff. AskCar page: https://askcar.co.uk/car/audi-a3-2018-b646b3313680