Parts for your 2022 Mazda 3-Wheel hubs

2022 Mazda 3 wheel hubs — what they do and when to service them

Wheel hubs are absolutely used on the 2022 Mazda 3 (BP series). Mazda’s Workshop Manual for the BP platform details bolt-in hub unit bearings at the front and rear, with integrated bearing cartridges and ABS/tone ring interfaces. The Mazda genuine parts catalogue for BP models also lists complete front wheel hub units and rear hub and bearing units for both hatch and sedan variants. Independent fitment guides for 2019–2023 Mazda 3 likewise specify hub assemblies with sealed bearings. So, wheel hubs are relevant to this model and form a critical part of the suspension and braking package.

On the 2022 Mazda 3, the wheel hub sits between the steering knuckle (front) or rear axle carrier and the wheel. It houses the sealed bearing, the wheel studs, and the magnetic encoder that works with the wheel speed sensor for ABS and stability control. Its job is simple but vital: keep the wheel rotating smoothly, hold the wheel on securely, and feed clean speed data to the safety systems. Because the bearing is a sealed, non-serviceable unit, routine maintenance is more about inspection than adjustment.

As part of regular servicing, it’s smart to check for early signs of hub wear. A low rumble or humming that rises with road speed, a faint grinding when cornering, or ABS/DSC lights with no obvious brake issue can all point to a tired hub bearing. With the car safely lifted, spinning the wheel by hand and feeling for roughness, or rocking the tyre at 12 and 6 o’clock to detect free play, are quick tell-tales a technician will use. Also keep an eye on stud condition and nut torque after wheel changes — stretched studs or cross-threaded nuts are a no-go.

Replacement is straightforward for a trained tech: remove the caliper and rotor, unplug and protect the wheel speed sensor, unbolt the hub unit from the knuckle or axle carrier, and bolt in a new quality hub assembly. The bearing is part of the hub, so it’s swapped as a complete unit. There’s no re-greasing or preload to set. After refitting, correct axle nut and wheel nut torque is crucial, and a short road test to confirm quiet running and clean ABS readings is good practice. Hubs aren’t typically changed in pairs unless both show symptoms, but if one has failed due to water ingress, kerb strikes, or big pothole hits, the other side deserves a careful check.

• Common symptoms: humming/rumble with speed, ABS light, uneven tyre wear, heat at the hub after a drive.
• Service tip: keep wheel speed sensors clean and routed correctly, avoid pressure-washing directly into the hub face.
• Longevity: many hubs run well past 150,000 km when tyres, alignment, and wheel torque are kept in check.

Popular questions

How long do wheel hubs last on a 2022 Mazda 3?
Most owners will see well over 100,000–150,000 km from factory hubs, often much more. Life depends on road conditions, wheel impacts, water/mud exposure, tyre balance, and keeping wheel nuts correctly torqued. If the car is driven gently on sealed roads, hubs can last the life of the vehicle.

What are the signs a Mazda 3 hub bearing is failing?
A steady humming that changes with speed, a growl when turning one way, ABS or traction control warnings, or detectable play when rocking the wheel are the classic clues. Uneven tyre wear and a warm hub after a short drive can also signal internal bearing damage.

Is the ABS sensor part of the hub on the BP Mazda 3?
The hub unit contains the magnetic encoder ring, while the wheel speed sensor itself bolts to the knuckle or axle carrier and reads that ring. If the hub’s encoder is damaged, it can trigger ABS/DSC faults even if the sensor is fine.