2020 Mazda Mazda3 2.0 GT Sport Tech

Overview

• Make: Mazda
• Model: Mazda3
• Trim: GT Sport Tech
• Version: 2.0 GT Sport Tech Manual 4WD Euro 6 5dr (177 bhp)
• Year: 2020
• Mileage: 42,000 miles
• Fuel: Petrol
• Body: Hatchback, 5 doors, 5 seats
• Engine: 2.0 litres, 177 bhp
• Gearbox: Manual
• Drive: Four-wheel drive
• Colour: Red
• CO2: 142 g/km
• Emissions standard: Euro 6, ULEZ compliant

About this car

With 42,000 miles on the clock, this 2020 Mazda Mazda3 GT Sport Tech has done roughly 6,500 fewer miles than a typical 2020 Mazda Mazda3. The dealer is asking £15,485, which is £844 above the AskCar estimate of £14,641. To work out the AskCar estimate, we analyse UK dealer adverts for 1,239 Mazda Mazda3 cars across different ages and specifications. This car was first seen in our listings data 31 days ago. The recorded MOT expired on 25 October 2026, so ask the dealer whether it has been renewed. We checked its advertised mileage against the government's MOT record, and they match. It is advertised by Harris Cars in Southampton. How to contact the dealer and its opening hours are on this AskCar page.

Stock data as of 5 November 2026.

How we estimate prices and check cars

Price

Fair price: £844 (5%) over the AskCar estimate of £14,641.

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 1,239 priced Mazda Mazda3 adverts across different ages and specifications, as of 5 November 2026.

A 2020 Mazda Mazda3 with the 2.0 petrol engine is typically advertised at £13,000: the median of the 72 for sale on AskCar, as of 5 November 2026.

Time on sale

This 2020 Mazda Mazda3 has been on sale for at least 31 days.

Price history

AskCar first saw this advert on 5 October 2026 at £15,485. 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 5 November 2026: the latest record we hold ran out on 25 October 2026; ask the dealer for the current MOT.

It failed its MOT on 13 October 2025 (nearside headlamp aim too high; offside headlamp aim too high; nearside obligatory mirror slightly loose) and passed later the same day.

Advisories at the latest test: nearside obligatory mirror slightly loose.

Mileage at that test: 41,055 miles, which matches the advertised 42,000 miles.

Advertised mileage is about 6,500 miles lower than the median mileage of a 2020 Mazda Mazda3 on AskCar.

Similar cars

7 other 2020 Mazda Mazda3 GT Sport Tech 2.0 petrol manual hatchbacks are for sale at UK dealers, from £7,495 to £15,890, as of 5 November 2026.

The 3 closest to this car in mileage:

• 2020 Mazda Mazda3 GT Sport Tech, 2.0 petrol hatchback, grey. Mileage: 50,400 miles. Price: £13,595, £1,890 less than this car. Dealer: Holdcroft Motor Group Mazda Hanley in Hanley. AskCar page: https://askcar.co.uk/car/mazda-mazda3-2020-7c55b3adecd7
• 2020 Mazda Mazda3 GT Sport Tech, 2.0 petrol hatchback, grey. Mileage: 30,118 miles. Price: £15,350, £135 less than this car. Dealer: Evans Halshaw Renault Dacia Sunderland in Sunderland. AskCar page: https://askcar.co.uk/car/mazda-mazda3-2020-0d2be1f1af06
• 2020 Mazda Mazda3 GT Sport Tech, 2.0 petrol hatchback, white. Mileage: 56,775 miles. Price: £12,823, £2,662 less than this car. Dealer: Carbase Bristol in Bristol. AskCar page: https://askcar.co.uk/car/mazda-mazda3-2020-bec65ed4e504

• The nearest: 2020 Mazda Mazda3 GT Sport Tech, 2.0 petrol hatchback, grey, 31 miles from this car. Mileage: 80,000 miles. Price: £10,490, £4,995 less than this car. Dealer: Manamanx in Reading. AskCar page: https://askcar.co.uk/car/mazda-mazda3-2020-619bb6f00e2b