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 35 (147 bhp)
• Year: 2018
• Mileage: 31,603 miles
• Fuel: Petrol
• Body: Hatchback, 5 doors, 5 seats
• Engine: 1.5 litres, 147 bhp
• Gearbox: Automatic (S tronic)
• Drive: Front-wheel drive
• Colour: Blue
• CO2: 147 g/km
• Emissions standard: Euro 6, ULEZ compliant

About this car

This 2018 Audi A3 S Line is advertised with 31,603 miles, approximately 33,400 below the typical mileage for its age. Priced at £15,500, it is advertised £263 above the AskCar estimate of £15,237. The AskCar estimate uses 6,542 UK dealer adverts for the Audi A3, with adjustments for age, mileage, trim, engine and other specifications. We first recorded this advert 41 days ago, and its asking price has since fallen by £499. According to the government's MOT record, its advertised mileage is consistent with the latest test. The seller is Stratstone Amersham Audi, based in Amersham. 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: £263 (1%) over the AskCar estimate of £15,237.

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 41 days.

Price history

AskCar first saw this advert on 22 September 2026 at £15,999. Its asking price is now £15,500, £499 less. The latest price cut was seen on 22 October 2026.

Price changes recorded:

• 22 September 2026: £15,999
• 9 October 2026: £15,700
• 22 October 2026: £15,500

Mileage and MOT

MOT, from the government's MOT records (DVSA, the Driver and Vehicle Standards Agency), as of 2 November 2026: valid until 20 December 2026.

It has had 5 MOTs. The latest, on 5 December 2025, passed.

There were no advisories at the latest test.

Mileage at that test: 28,008 miles, which matches the advertised 31,603 miles.

Advertised mileage is about 33,400 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: 32,600 miles. Price: £15,985, £485 more than this car. Dealer: Michael Birks Specialist Cars in Sheffield. AskCar page: https://askcar.co.uk/car/audi-a3-2018-36264a2ac2d0
• 2018 Audi A3 S Line, 1.5 petrol hatchback, white. Mileage: 34,079 miles. Price: £15,995, £495 more than this car. Dealer: Jones Motor Company in Chester. AskCar page: https://askcar.co.uk/car/audi-a3-2018-3c33716dc7d4
• 2018 Audi A3 S Line, 1.5 petrol hatchback, grey. Mileage: 34,610 miles. Price: £14,990, £510 less than this car. Dealer: Lookers Vauxhall Ellesmere Port in Ellesmere Port. AskCar page: https://askcar.co.uk/car/audi-a3-2018-0f98d523f5ab

• The nearest: 2018 Audi A3 S Line, 1.5 petrol hatchback, black, 17 miles from this car. Mileage: 71,340 miles. Price: £12,199, £3,301 less than this car. Dealer: World Cars in Egham. AskCar page: https://askcar.co.uk/car/audi-a3-2018-685211d86742