2018 Audi A3 1.6 TDI S Line

Overview

• Make: Audi
• Model: A3
• Trim: S Line
• Version: 1.6 TDI S Line Manual FWD Euro 6 (s/s) 5dr Sportback (108 bhp)
• Year: 2018
• Mileage: 138,000 miles
• Fuel: Diesel
• Body: Hatchback, 5 doors, 5 seats
• Engine: 1.6 litres, 108 bhp
• Gearbox: Manual
• Drive: Front-wheel drive
• Colour: Red
• CO2: 108 g/km
• Emissions standard: Euro 6, ULEZ compliant

About this car

With 138,000 miles on the clock, this 2018 Audi A3 S Line has done roughly 73,000 more miles than a typical 2018 Audi A3. Priced at £6,500, it is advertised £719 below the AskCar estimate of £7,219. 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 81 days ago, and its asking price has since fallen by £495. The recorded MOT expired on 29 July 2026, so ask the dealer whether it has been renewed. We checked its advertised mileage against the government's MOT record, and they match. The seller is Coventry Sterling Motors, based in Coventry. 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

Good value: £719 (9%) under the AskCar estimate of £7,219.

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 1.6 diesel engine is typically advertised at £10,100: the median of the 36 for sale on AskCar, as of 2 November 2026.

Time on sale

This 2018 Audi A3 has been on sale for at least 81 days.

Price history

AskCar first saw this advert on 13 August 2026 at £6,995. Its asking price is now £6,500, £495 less. The latest price cut was seen on 25 October 2026.

Price changes recorded:

• 13 August 2026: £6,995
• 25 October 2026: £6,500

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 29 July 2026; ask the dealer for the current MOT.

It has had 5 MOTs. The latest, on 15 July 2025, passed.

There were no advisories at the latest test.

Mileage at that test: 124,991 miles, which matches the advertised 138,000 miles.

Advertised mileage is about 73,000 miles higher than the median mileage of a 2018 Audi A3 on AskCar.

Similar cars

4 other 2018 Audi A3 S Line 1.6 diesel manual hatchbacks are for sale at UK dealers, from £7,396 to £11,295, as of 2 November 2026.

The 3 closest to this car in mileage:

• 2018 Audi A3 S Line, 1.6 diesel hatchback, black. Mileage: 123,760 miles. Price: £7,396, £896 more than this car. Dealer: Stockport Car Supermarket in Stockport. AskCar page: https://askcar.co.uk/car/audi-a3-2018-d69bf0464c1b
• 2018 Audi A3 S Line, 1.6 diesel hatchback, grey. Mileage: 78,267 miles. Price: £10,490, £3,990 more than this car. Dealer: Ebony & Ivory Motors in Scunthorpe. AskCar page: https://askcar.co.uk/car/audi-a3-2018-d0ec712d16b7
• 2018 Audi A3 S Line, 1.6 diesel hatchback, black. Mileage: 70,000 miles. Price: £11,000, £4,500 more than this car. Dealer: LIV Motors in Prestwich. AskCar page: https://askcar.co.uk/car/audi-a3-2018-964ab24a260e