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: 46,182 miles
• Fuel: Petrol
• Body: Hatchback, 5 doors, 5 seats
• Engine: 1.5 litres, 147 bhp
• Gearbox: Automatic (S tronic)
• Drive: Front-wheel drive
• Colour: Grey
• CO2: 114 g/km
• Emissions standard: Euro 6, ULEZ compliant

About this car

This 2018 Audi A3 S Line has covered 46,182 miles, around 18,800 fewer miles than is typical for its age. The AskCar estimate for this car is £14,431. It is priced at £13,990, which is £441 below that estimate. To work out the AskCar estimate, we analyse UK dealer adverts for 6,542 Audi A3 cars across different ages and specifications. It first appeared in our advert records 2 days ago. According to the government's MOT record, its advertised mileage is consistent with the latest test. The seller is Swansway Garages Blackburn Audi, based in Blackburn,. 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: £441 (3%) under the AskCar estimate of £14,431.

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

AskCar first saw this 2018 Audi A3 advertised 2 days ago. About half of 2018 Audi A3 cars are gone from sale within a month of being advertised: 230 of the 468 first advertised between 10 July 2026 and 29 September 2026.

Price history

AskCar first saw this advert on 31 October 2026 at £13,990. 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 2 November 2026: valid until 29 April 2027.

It failed its MOT on 31 March 2026 (nearside front inner tyre has a bulge, caused by separation or partial failure of its structure sidewall) and passed 2 days later, on 2 April 2026.

Advisories at the latest test: offside front tyre worn close to legal limit/worn on edge 3mm; nearside rear tyre worn close to legal limit/worn on edge 3mm; nearside rear brake pad(s) wearing thin; and 1 more.

Mileage at that test: 45,173 miles, which matches the advertised 46,182 miles.

Advertised mileage is about 18,800 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: 45,185 miles. Price: £13,560, £430 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, black. Mileage: 47,320 miles. Price: £13,900, £90 less than this car. Dealer: Sytner Select Cardiff in Cardiff. AskCar page: https://askcar.co.uk/car/audi-a3-2018-ce8e5ed28cb7
• 2018 Audi A3 S Line, 1.5 petrol hatchback, blue. Mileage: 50,758 miles. Price: £14,170, £180 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, black, 18 miles from this car. Mileage: 85,945 miles. Price: £11,299, £2,691 less than this car. Dealer: Bripark Wigan in Wigan. AskCar page: https://askcar.co.uk/car/audi-a3-2018-2fe375c58f6b