2018 Audi A3 1.5 TFSI S Line

Overview

• Make: Audi
• Model: A3
• Trim: S Line
• Version: 1.5 TFSI S Line Manual FWD Euro 6 5dr (147 bhp)
• Year: 2018
• Mileage: 66,026 miles
• Fuel: Petrol
• Body: Hatchback, 5 doors, 5 seats
• Engine: 1.5 litres, 147 bhp
• Gearbox: Manual
• Drive: Front-wheel drive
• Colour: Black
• CO2: 118 g/km
• Emissions standard: Euro 6, ULEZ compliant

About this car

This 2018 Audi A3 S Line is advertised with 66,026 miles on the clock. The dealer is asking £11,850, which is £202 above the AskCar estimate of £11,648. To work out the AskCar estimate, we analyse UK dealer adverts for 6,542 Audi A3 cars across different ages and specifications. Since we first spotted the advert 32 days ago, the asking price has dropped by £800. Our records show an MOT expiry date of 7 September 2026, which has passed. Ask the dealer for an update. Its advertised mileage matches the government's MOT record. The seller is Trust Ford Belfast (Newtownards Road), based in Belfast. 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: £202 (1%) over the AskCar estimate of £11,648.

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 32 days.

Price history

AskCar first saw this advert on 1 October 2026 at £12,650. Its asking price is now £11,850, £800 less. The latest price cut was seen on 23 October 2026.

Price changes recorded:

• 1 October 2026: £12,650
• 7 October 2026: £12,250
• 23 October 2026: £11,850

Mileage and MOT

MOT, from the government's MOT records (DVSA, the Driver and Vehicle Standards Agency), as of 2 November 2026: the latest record we hold ran out on 7 September 2026; ask the dealer for the current MOT.

It failed its MOT on 15 August 2025 (nearside front tyre tread depth below requirements of 1.6mm) and passed later the same day.

There were no advisories at the latest test.

Mileage at that test: 56,596 miles, which matches the advertised 66,026 miles.

Advertised mileage is about 1,000 miles higher than the median mileage of a 2018 Audi A3 on AskCar.

Similar cars

26 other 2018 Audi A3 S Line 1.5 petrol manual hatchbacks are for sale at UK dealers, from £6,990 to £15,999, as of 2 November 2026.

The 3 closest to this car in mileage:

• 2018 Audi A3 S Line, 1.5 petrol hatchback, black. Mileage: 62,313 miles. Price: £12,450, £600 more than this car. Dealer: Richard Greer Car Sales in Ballyclare. AskCar page: https://askcar.co.uk/car/audi-a3-2018-0d81202abb38
• 2018 Audi A3 S Line, 1.5 petrol hatchback, red. Mileage: 62,000 miles. Price: £11,495, £355 less than this car. Dealer: Bateman & Lynch Cars Tavistock in Tavistock. AskCar page: https://askcar.co.uk/car/audi-a3-2018-9d061738ecc1
• 2018 Audi A3 S Line, 1.5 petrol hatchback, black. Mileage: 71,004 miles. Price: £11,989, £139 more than this car. Dealer: FunkyDubz in Bournemouth. AskCar page: https://askcar.co.uk/car/audi-a3-2018-d0d717ea79b1