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Mazda 3 Saloon (2004-2008) running costs and reliability

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Running costs rating: 3 out of 53.0

Written by David Ross Updated: 10 October 2023

Miles per pound (mpp)

Reliable fuel consumption data for comparison purposes is not available for this model.

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Fuel economy

A more stringent standard for fuel economy (WLTP) was introduced from September 2017, and this model was not required to undergo that test. Its fuel economy measured under the previous test system was 34 - 58 mpg. However these figures are less likely to be achievable in real world driving and so should never be compared to another car's mpg which was measured under the newer, more realistic WLTP system.

View mpg & specs for any version

All the engines are reasonably economical, insurance is cheap for the class and servicing at Mazda dealers is usually well priced. Service intervals could be better spaced, however, plus small saloons rarely hold their value. It’s likely to be worth just under half of its original value after three years – not performing as well as the hatchback.

The 3 performs well on the eco front and with an average of 159g/km CO2 across the range, its emissions are relatively low for a small family hatchback. The greenest model in the line-up is the 1.6-litre diesel which emits 135g/km of CO2 and averages 56mpg. In 2004 this engine was revised and emissions fell to 128g/km of CO2 while economy rose to 58mpg.

The Mazda has proven good so far and the firm has a strong reputation for well built and reliable cars. Its predecessor, the 323, was supremely reliable.