2021 Audi A3 2.0 TDI S Line

Overview

• Make: Audi
• Model: A3
• Trim: S Line
• Version: 2.0 TDI 30 S Line Manual FWD Euro 6 (s/s) 4dr (114 bhp)
• Year: 2021
• Mileage: 91,000 miles
• Fuel: Diesel
• Body: Saloon, 4 doors, 5 seats
• Engine: 2.0 litres, 114 bhp
• Gearbox: Manual
• Drive: Front-wheel drive
• Colour: Grey
• CO2: 119 g/km
• Emissions standard: Euro 6, ULEZ compliant

About this car

This 2021 Audi A3 S Line is advertised with 91,000 miles on the clock. Priced at £15,495, it is advertised £2,593 above the AskCar estimate of £12,902. The AskCar estimate uses UK dealer asking prices, including 6,542 Audi A3 adverts, and accounts for the car’s age, mileage and specification. We first recorded this advert 154 days ago, and its asking price has since fallen by £2,255. Ask the dealer why the advert shows fewer miles than the 91,954 recorded at the latest MOT. MOT records show an expiry date of 13 January 2027. The seller is MC Autosales, based in Magherafelt. 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

Above the going rate: £2,593 (20%) over the AskCar estimate of £12,902.

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 2021 Audi A3 with the 2.0 diesel engine is typically advertised at £17,400: the median of the 45 for sale on AskCar, as of 2 November 2026.

Time on sale

This 2021 Audi A3 has been on sale for at least 154 days.

Price history

AskCar first saw this advert on 1 June 2026 at £17,750. Its asking price is now £15,495, £2,255 less. The latest price cut was seen on 30 July 2026.

Price changes recorded:

• 1 June 2026: £17,750
• 30 July 2026: £15,495

Mileage and MOT

MOT, from the government's MOT records (DVSA, the Driver and Vehicle Standards Agency), as of 2 November 2026: valid until 13 January 2027.

It has had 3 MOTs. The latest, on 14 January 2026, passed.

There were no advisories at the latest test.

Mileage at that test: 91,954 miles. The advert says 91,000 miles, fewer than the MOT record, so ask the dealer which is right.

Advertised mileage is about 47,400 miles higher than the median mileage of a 2021 Audi A3 on AskCar.

Similar cars

1 other 2021 Audi A3 S Line 2.0 diesel manual saloon is for sale at UK dealers, as of 2 November 2026.

The closest to this car in mileage:

• 2021 Audi A3 S Line, 2.0 diesel saloon, black. Mileage: 70,871 miles. Price: £13,800, £1,695 less than this car. Dealer: Big Motoring World Cannock in Cannock. AskCar page: https://askcar.co.uk/car/audi-a3-2021-a14c22602496