Hyundai i30 vs Mazda3

The Mazda3 G20 Pure at $26,490 is $2,760 less than the i30 Sedan Active at $29,250, both recommended retail before on-road costs. The Mazda also costs slightly less to fuel: at 15,000km a year and $1.90 a litre it runs about $1,682 annually against $1,738 for the i30. That is only $56 a year, so this is nothing like the fuel gap this comparison used to describe. The two are effectively level at the bowser.

One note on the i30 range while we are on price. The i30 hatch is no longer sold in base Active trim in Australia; the hatch now starts at N Line, $36,000. If you specifically want an i30 hatchback you are shopping $9,510 above the Mazda3 G20 Pure, and the fair Mazda rival becomes the G25 Evolve SP at $36,490.

5-Year Cost Estimate

The Mazda3 saves roughly $2,241 over five years, and almost all of it is the purchase price. Fuel is now close to a wash between the two, and the i30's higher starting price means it hands back more dollars at trade-in even on a lower retention rate. If long-term cost of ownership is your primary concern, the Mazda3 still wins, just for different reasons than it used to.

This section has changed direction, so read it carefully if you have seen an older version of this comparison.

The i30 Sedan holds a three-star ANCAP rating from 2024, not five. The current Mazda3 has no ANCAP rating on record, so we will not put a star count on it in either direction. That is not the same as saying the Mazda is safer; it means one car has a published rating that is below the class norm and the other has not been rated. If a published five-star result is a hard requirement, neither of these two gives you one.

On equipment, the earlier claim that the Mazda3 G20 Pure lacks blind-spot monitoring was wrong. Both cars list blind-spot monitoring as standard, and the Mazda3 also lists rear cross-traffic alert, which the i30 Sedan Active does not. So the active-safety advantage at this trim now sits with the Mazda, not the Hyundai.

Both come with autonomous emergency braking, lane keep assist, adaptive cruise control and a reversing camera as standard, plus front, side and curtain airbags, stability control and traction control.

The i30 Sedan Active gets an 8-inch touchscreen with wireless Apple CarPlay and Android Auto. Wireless connectivity is a genuine convenience advantage on a daily basis: no cable, no fumbling, the phone connects on its own.

The Mazda3 G20 Pure gets an 8.8-inch widescreen display controlled by a rotary dial on the centre console. Apple CarPlay is wired only. The screen is positioned higher on the dashboard, closer to the driver's line of sight, which Mazda argues is safer. The rotary controller takes a few days to learn but becomes intuitive quickly.

The Mazda3's interior quality is the standout. Even at the base G20 Pure spec, the cabin materials feel a class above. Soft-touch surfaces, tight panel gaps, and a minimalist design that punches well above its price point. The i30 Active is perfectly fine, but the plastics feel harder and the overall ambience is more budget-oriented.

Both have cloth seats, manual air conditioning, a reversing camera and blind-spot monitoring. The i30 adds wireless phone mirroring. The Mazda3 counters with a larger screen, rear cross-traffic alert and a more premium-feeling cabin. It depends what you value more.

Both use naturally aspirated 2.0-litre four-cylinder engines driving the front wheels, but they are not matched on transmission: the i30 Sedan uses a CVT, the Mazda3 a conventional six-speed torque-converter automatic.

The Mazda3 has 4kW and 20Nm on the i30, and the fuel figures are now within 0.2L/100km of each other, so the Skyactiv-G efficiency argument is much narrower than it once was. What is left is the transmission. The Mazda3's six-speed torque-converter auto steps through fixed ratios; the i30 Sedan's CVT holds revs under load in the way CVTs do. Which you prefer is a matter of taste, but they are not the same kind of drivetrain and the specification sheet should say so.

The i30 is 158kg lighter, which counts for something against its lower output. Neither maker publishes a 0-100 claim for the i30 Sedan Active; the Mazda3 is quoted at 9.7 seconds.

On towing the positions have swapped: the Mazda3 is rated to 1,200kg braked, the i30 Sedan to 1,100kg. Neither is a natural tow car, and 100kg is not a reason to choose either one.

Boot space is the i30's one decisive win, and it is a big one. At 474 litres against 295, the Hyundai sedan has 179 litres more cargo room. That is the difference between fitting the pram and the shopping, or choosing one or the other. The Mazda3's 295-litre boot is one of the smallest in the class and remains its biggest practical weakness.

Both are sedans, so neither gives you the wide hatch aperture that makes loading bulky items easy. If you need that, the Mazda3 is also sold as a hatch at the same money, and the i30 hatch starts at $36,000 in N Line trim with a 395-litre boot.

Rear seat space is acceptable in both, though the i30 has slightly more legroom thanks to its more upright rear seat design. The Mazda3's rear seat is lower and more reclined, which feels sportier but sacrifices a bit of headroom for taller passengers. Children will be comfortable in both.

The Mazda3's interior design and materials quality, though, is genuinely a class above. The dashboard layout, the feel of the switchgear, and the overall cabin ambience are closer to a $40,000 car than a $26,490 one. If you spend a lot of time in your car and care about the tactile quality of what you touch every day, the Mazda3 makes a strong case despite its smaller boot.

Both offer 5-year unlimited kilometre warranties. Both include roadside assist for the warranty period. There is no differentiation here.

Servicing costs are virtually identical. Both brands offer capped-price servicing programmes with annual or 15,000km intervals. Each service runs approximately $200-280 depending on the specific items required. Over five years, expect to spend roughly $2,400 on scheduled servicing for either car.

The Mazda3 holds a slightly higher percentage of its value. Mazda3 resale has been consistently strong in Australia, with expected retention of around 50% after five years against roughly 47% for the i30. In dollar terms the i30 actually hands back a bit more because it started $2,760 higher, but it started $2,760 higher to do it.

Both run on standard 91-octane unleaded. Both are front-wheel-drive sedans with proven, naturally aspirated engines and no turbocharger, dual-clutch gearbox or hybrid system to worry about. The one drivetrain difference to be aware of is the i30's CVT against the Mazda3's conventional automatic. These are mechanically straightforward cars either way.

Parts availability is excellent for both. Hyundai and Mazda both have extensive dealer and service networks across Australia, including regional areas. You will not struggle to find a workshop regardless of where you live.