Compare the2023 Kia NiroVS 2023 Mazda CX-30

In the past twenty years hundreds of infants and young children have died after being left in vehicles, usually by accident. When turning the vehicle off, drivers of the Niro are reminded to check the back seat if they opened the rear door before starting out. The CX-30 doesn’t offer a back seat reminder.

The Niro has a standard blind spot warning system that uses sensors to alert the driver to objects in the vehicle’s blind spots where the side view mirrors don’t reveal them and moves the vehicle back into its lane. Only the CX-30 Select/Preferred/Carbon/Premium offers a blind spot warning system.

To help make backing out of a parking space safer, the Niro has standard Rear Cross-Traffic Collision Warning and Rear Cross-Traffic Collision-Avoidance Assist automatically engages the brakes to help avoid a collision. Only the CX-30 Select/Preferred/Carbon/Premium offers Rear Cross Traffic Alert.

Both the Niro and the CX-30 have standard driver and passenger frontal airbags, front side-impact airbags, driver knee airbags, side-impact head airbags, front seatbelt pretensioners, height adjustable front shoulder belts, four-wheel antilock brakes, traction control, electronic stability systems to prevent skidding, crash mitigating brakes, daytime running lights, lane departure warning systems, rearview cameras, driver alert monitors and available front and rear parking sensors.

The Niro comes with a full 5-year/60,000-mile basic warranty, which covers the entire truck and includes 24-hour roadside assistance. The CX-30’s 3-year/36,000-mile basic warranty expires 2 years or 24,000 miles sooner.

Kia’s powertrain warranty covers the Niro 5 years and 40,000 miles longer than Mazda covers the CX-30. Any repair needed on the engine, transmission, axles, joints or driveshafts is fully covered for 10 years or 100,000 miles. Coverage on the CX-30 ends after only 5 years or 60,000 miles.

There are over 42 percent more Kia dealers than there are Mazda dealers, which makes it easier should you ever need service under the Niro’s warranty.

A reliable vehicle saves its owner time, money and trouble. Nobody wants to be stranded or have to be without a vehicle while it’s being repaired. Consumer Reports rates the Niro’s reliability 18 points higher than the CX-30.

J.D. Power and Associates’ 2022 Initial Quality Study of new car owners surveyed provide the statistics that show that Kia vehicles are better in initial quality than Mazda vehicles. J.D. Power ranks Kia fourth in initial quality, above the industry average. With 24 more problems per 100 vehicles, Mazda is ranked 15th.

J.D. Power and Associates’ 2022 survey of the owners of three-year-old vehicles provides the statistics that show that Kia vehicles are more reliable than Mazda vehicles. J.D. Power ranks Kia first in reliability, above the industry average. With 34 more problems per 100 vehicles, Mazda is ranked 12th.

The Niro’s 1.6 DOHC 4-cylinder hybrid produces 9 lbs.-ft. more torque (195 vs. 186) than the CX-30’s standard 2.5 DOHC 4-cylinder.

On the EPA test cycle the Niro gets better mileage than the CX-30:

Regenerative brakes improve the Niro’s fuel efficiency by converting inertia back into energy instead of wasting it. The CX-30 doesn’t offer a regenerative braking system.

In heavy traffic or at stoplights the Niro’s engine automatically turns off when the vehicle is stopped, saving fuel and reducing pollution. The engine is automatically restarted when the driver gets ready to move again. The CX-30 doesn’t offer an automatic engine start/stop system.

To lower fuel costs and make buying fuel easier, the Kia Niro uses regular unleaded gasoline. The CX-30 with the 2.5 turbo 4-cylinder engine requires premium for maximum efficiency, which can cost on average about 82.8 cents more per gallon.

In its Green Vehicle Guide, the U.S. Environmental Protection Agency (EPA) rates the Kia Niro higher (7 out of 10) than the Mazda CX-30 (5 to 7). This means the Niro produces up to 8 pounds less smog-producing pollutants than the CX-30 every 15,000 miles.

The Niro offers a standard sequential manual gearbox (SMG). With no clutch pedal to worry about and a fully automatic mode, an SMG is much more efficient than a conventional automatic but just as easy to drive. The CX-30 doesn’t offer an SMG or a conventional manual transmission.

The Niro stops shorter than the CX-30:

For better traction, the Niro Touring’s tires are larger than the largest tires available on the CX-30 (225/45R18 vs. 215/65R16).

The Niro’s standard tires provide better handling because they have a lower 60 series profile (height to width ratio) that provides a stiffer sidewall than the CX-30 2.5 S’ standard 65 series tires. The Niro Touring’s tires have a lower 45 series profile than the CX-30 Select/Preferred/Carbon/Turbo/Premium’s 55 series tires.

For superior ride and handling, the Kia Niro has fully independent front and rear suspensions. An independent suspension allows the wheels to follow the road at the best angle for gripping the pavement, without compromising ride comfort. The Mazda CX-30 has a rear torsion beam axle, with a semi-independent rear suspension.

For a smoother ride and more stable handling, the Niro’s wheelbase is 2.7 inches longer than on the CX-30 (107.1 inches vs. 104.4 inches).

For better handling and stability, the average track (width between the wheels) on the Niro is .6 inches wider in the front and 1.1 inches wider in the rear than the track on the CX-30.

The Niro SX handles at .84 G’s, while the CX-30 Premium pulls only .79 G’s of cornering force in a Motor Trend skidpad test.

The Kia Niro may be more efficient, handle and accelerate better because it weighs about 300 to 350 pounds less than the Mazda CX-30.

The front grille of the Niro uses electronically controlled shutters to close off airflow and reduce drag when less engine cooling is needed. This helps improve highway fuel economy. The CX-30 doesn’t offer active grille shutters.

The Niro has 2.4 inches more front headroom, .6 inches more front shoulder room, 1.2 inches more rear headroom, 3.5 inches more rear legroom and 1.8 inches more rear shoulder room than the CX-30.

The Niro has a much larger cargo volume with its rear seat up than the CX-30 with its rear seat up (22.8 vs. 20.2 cubic feet). The Niro has a much larger cargo volume with its rear seat folded than the CX-30 with its rear seat folded (63.7 vs. 45.2 cubic feet).

To make loading groceries and cargo easier when your hands are full, the Niro’s liftgate can be opened just by waiting momentarily behind the back bumper, leaving your hands completely free. The CX-30 doesn’t offer a hands-free gesture to open its liftgate, forcing you to put cargo down if your hands are full.

The Niro uses gas struts to support the hood for easier service access. The CX-30 uses a prop rod to support its heavy hood. It takes two hands to open the hood and set the prop rod, the prop rod gets in the way during maintenance and service, and the prop rod could be knocked out, causing the heavy hood to fall on the person maintaining or servicing the car.

The Niro SX’s standard easy entry system glides the driver’s seat back when the door is unlocked or the ignition is switched off, making it easier for the driver to get in and out. The CX-30 doesn’t offer an easy entry system.

The power windows standard on both the Niro and the CX-30 have locks to prevent small children from operating them. When the lock on the Niro is engaged the driver can still operate all of the windows, for instance to close one opened by a child. The CX-30 prevents the driver from operating the other windows just as it does the other passengers.

On a hot day the Niro’s driver can lower all the windows from a distance using the keyless remote. The driver of the CX-30 can only operate the windows from inside the vehicle, with the ignition on.

To improve rear visibility by keeping the rear window clear, the Niro has a standard rear fixed intermittent wiper with a full on position. The rear wiper standard on the CX-30 only has an intermittent setting, so in a hard rain visibility isn’t as good.

The Niro’s standard outside mirrors include heating elements to clear off the mirrors for better visibility. Mazda only offers heated mirrors on the CX-30 Carbon/Turbo.

The Niro has a standard heated steering wheel to take the chill out of steering on extremely cold winter days before the vehicle heater warms up. A heated steering wheel is only available on the CX-30 Turbo.

The Niro has a standard dual zone air conditioning allows the driver and front passenger to choose two completely different temperatures so people with different temperature preferences won’t have to compromise. This makes both the driver and front passenger as comfortable as possible. Dual zone air conditioning is only available on the CX-30 Select/Preferred/Carbon/Turbo/Premium.

Consumer Reports® recommends the Kia Niro, based on reliability, safety and performance. The Mazda CX-30 isn't recommended.