2021 Audi A3 1.5 TFSI S Line

Overview

• Make: Audi
• Model: A3
• Trim: S Line
• Version: 1.5 TFSI 35 S Line Manual FWD Euro 6 (s/s) 5dr Sportback (148 bhp)
• Year: 2021
• Mileage: 51,817 miles
• Fuel: Petrol
• Body: Hatchback, 5 doors, 5 seats
• Engine: 1.5 litres, 148 bhp
• Gearbox: Manual
• Drive: Front-wheel drive
• Colour: White
• CO2: 136 g/km
• Emissions standard: Euro 6, ULEZ compliant

About this car

This 2021 Audi A3 S Line is advertised with 51,817 miles, approximately 9,500 above the typical mileage for its age. Priced at £16,790, it is advertised £984 above the AskCar estimate of £15,806. The AskCar estimate draws on 6,691 Audi A3 adverts across the UK, adjusting for age, mileage, trim, engine and other specifications. This car was first seen in our listings data 4 days ago. According to the government's MOT record, its advertised mileage is consistent with the latest test. The seller is Sinclair Audi Approved Neyland, based in Neyland. How to contact the dealer and its opening hours are on this AskCar page.

Stock data as of 7 November 2026.

How we estimate prices and check cars

Price

Fair price: £984 (6%) over the AskCar estimate of £15,806.

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 6,691 priced Audi A3 adverts across different ages and specifications, as of 7 November 2026.

A 2021 Audi A3 with the 1.5 petrol engine is typically advertised at £18,000: the median of the 198 for sale on AskCar, as of 7 November 2026.

Time on sale

AskCar first saw this 2021 Audi A3 advertised 4 days ago. About 6 in 10 of 2021 Audi A3 cars are gone from sale within a month of being advertised: 440 of the 781 first advertised between 7 July 2026 and 4 October 2026.

Price history

AskCar first saw this advert on 3 November 2026 at £16,790. 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 7 November 2026: valid until 16 April 2027.

It has had 3 MOTs. The latest, on 13 April 2026, passed.

Advisories at the latest test: central front items removed from driver's view prior to test; nearside rear child seat fitted not allowing full inspection of adult belt child seat belt checked; offside front shock absorbers has light misting of oil.

Mileage at that test: 45,866 miles, which matches the advertised 51,817 miles.

Advertised mileage is about 9,500 miles higher than the median mileage of a 2021 Audi A3 on AskCar.

Similar cars

25 other 2021 Audi A3 S Line 1.5 petrol manual hatchbacks are for sale at UK dealers, from £12,795 to £18,590, as of 7 November 2026.

The 3 closest to this car in mileage:

• 2021 Audi A3 S Line, 1.5 petrol hatchback, blue. Mileage: 55,385 miles. Price: £15,395, £1,395 less than this car. Dealer: Motor Range Liverpool in Liverpool. AskCar page: https://askcar.co.uk/car/audi-a3-2021-3903570ed1c0
• 2021 Audi A3 S Line, 1.5 petrol hatchback, white. Mileage: 57,450 miles. Price: £15,180, £1,610 less than this car. Dealer: Big Motoring World Warrington in Warrington. AskCar page: https://askcar.co.uk/car/audi-a3-2021-5ca99fe74966
• 2021 Audi A3 S Line, 1.5 petrol hatchback, white. Mileage: 44,792 miles. Price: £15,640, £1,150 less than this car. Dealer: Big Motoring World Blue Bell Hill in Blue Bell Hill. AskCar page: https://askcar.co.uk/car/audi-a3-2021-d76776fc4f0b

• The nearest: 2021 Audi A3 S Line, 1.5 petrol hatchback, black, 65 miles from this car. Mileage: 63,297 miles. Price: £15,499, £1,291 less than this car. Dealer: Pinetree Car Superstore - Tonypandy in Tonypandy. AskCar page: https://askcar.co.uk/car/audi-a3-2021-76d67551a08b