2021 Mazda Mazda3 2.0 SKYACTIV-X MHEV GT Sport Tech

Version: 2.0 Skyactiv-x Mhev GT Sport Tech Auto 4WD Euro 6 (s/s) 5dr (178 bhp)

Price: £17,635. Fair price: £1,506 (7%) under the AskCar estimate of £19,141, our expected asking price for this car from its model, age, mileage and specification, drawing on 1,243 priced Mazda Mazda3 adverts on AskCar as of 30 October 2026.

AskCar lists 1,283 used Mazda Mazda3 from 675 UK dealerships, as of 30 October 2026.

Overview

Make
Mazda
Model
Mazda3
Trim
GT Sport Tech
Version
2.0 Skyactiv-x Mhev GT Sport Tech Auto 4WD Euro 6 (s/s) 5dr (178 bhp)
Mileage
21,000 miles
Year
2021
Fuel type
Petrol
Body type
Hatchback
Engine
2.0 L
Gearbox
Automatic
Power
178 bhp
Seats
5
CO2
157 g/km
Colour
Red
Doors
5
Driven wheels
Four Wheel Drive
Engine badge
SKYACTIV-X; MHEV
Hybrid type
Mild hybrid
Emissions standard
Euro 6

About this car

At 21,000 miles, this 2021 Mazda Mazda3 GT Sport Tech has covered about 11,000 fewer miles than other 2021 Mazda Mazda3 cars. Priced at £17,635, it is advertised £1,506 below the AskCar estimate of £19,141. The AskCar estimate draws on 1,243 Mazda Mazda3 adverts across the UK, adjusting for age, mileage, trim, engine and other specifications. We first saw this car advertised 62 days ago. Its asking price has since fallen by £1,865. That history is worth bearing in mind when speaking to the dealer. Its recorded MOT is valid until 29 July 2027, and its advertised mileage is consistent with the latest MOT reading. The seller is Hendy Mazda Horsham, based in Horsham.

Stock data as of 30 October 2026.

How we estimate prices and check cars

Price history

AskCar first saw this advert on 29 August 2026, 62 days ago. Price reduced by £1,865 from £19,500 since AskCar first saw it. 10 price reductions recorded, the latest seen on 21 October 2026.

Recorded asking prices
Date observedAsking price
29 August 2026£19,500
18 September 2026£19,475
23 September 2026£19,431
24 September 2026£19,430
25 September 2026£19,334
26 September 2026£19,305
30 September 2026£19,243
7 October 2026£18,936
9 October 2026£18,658
16 October 2026£17,858
21 October 2026£17,635
30 October 2026£17,635

Price and mileage comparison

Fair price: £1,506 (7%) under the AskCar estimate of £19,141.

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 1,243 priced Mazda Mazda3 adverts across different ages and specifications, as of 30 October 2026.

Advertised mileage is about 11,000 miles lower than the median mileage of a 2021 Mazda Mazda3 on AskCar.

The advertised mileage is consistent with the last MOT reading.

MOT

MOT: valid until 29 July 2027. 19,953 miles at the last test.

Other matching cars

3 other 2021 Mazda Mazda3 GT Sport Tech automatic petrol cars are for sale at UK dealers from £15,999 to £16,749, as of 30 October 2026.

The 3 matching cars have covered 32,197 to 41,831 miles, compared with 21,000 miles for this car.

Matching year, trim, gearbox and fuel does not mean matching mileage or every specification. The AskCar estimate adjusts for these differences.

Browse all Mazda Mazda3 cars for sale · 2021 Mazda Mazda3 price guide

More like this

Photos

61 photos of this car are on its AskCar page.

How to contact the dealer and its opening hours are on this AskCar page.

As of 30 October 2026, AskCar lists 580,490 cars and vans from 12,695 UK dealerships, read daily from dealer websites: over 99% of UK dealer used car adverts. No dealer pays to be listed.