Parts for your 2014 Mazda 3-Wheel hubs

2014 Mazda 3 wheel hubs — purpose, upkeep, and when to replace

Technical sources confirm wheel hubs are absolutely used and relevant on the 2014 Mazda 3 (BM/BN series). The Mazda3 2014 Workshop Manual details front and rear hub/bearing removal and installation procedures, the Mazda Electronic Parts Catalogue lists front and rear hub or hub–bearing assemblies (with ABS tone/encoder rings), and bearing manufacturers’ application catalogues (e.g., NSK/NTN/Timken/SKF) list complete hub units for this model. So, yes — this vehicle is fitted with wheel hubs.

On a 2014 Mazda 3, the wheel hub is the solid mounting point that the wheel bolts to, and it houses the sealed wheel bearing. Many variants use a bolt-on rear hub/bearing assembly and a front setup where the bearing is pressed into the steering knuckle with the hub flange. The hub keeps the wheel centred and spinning smoothly while supporting braking and cornering loads. The ABS sensor reads from a tone ring or magnetic encoder in the hub, so a failing hub can also trigger ABS/DSC warnings.

Because these are sealed bearings, there’s no greasing or periodic adjustment — once wear sets in, the fix is replacement. Quality hubs can run well past 150,000 km, but coarse-chip roads, hard kerb strikes, deep potholes, or frequent water crossings can shorten life. Coastal driving can also encourage corrosion around the mounting face and wheel studs if not kept clean.

• Typical symptoms: a humming or growling that rises with speed, a rumble that changes when steering left/right, ABS/traction lights, heat at the hub, or wheel play felt at 12 and 6 o’clock.
• Quick checks: spin the wheel while listening for roughness, feel for notchiness with the wheel off, scan for ABS codes, and inspect the hub face for corrosion.

1. When replacing, use quality parts and always torque the axle nut, caliper bracket, and hub bolts to Mazda specs. Many axle/hub nuts are single‑use — replace them.
2. Avoid hammering on the hub, use a puller or press as the manual specifies to protect the knuckle and ABS encoder.
3. Clean the hub/knuckle mating faces and apply appropriate anti-seize on the spigot to prevent future wheel-to-hub corrosion, especially in coastal areas.
4. After fitting, road test and recheck for noise or ABS faults. Rotate tyres and check alignment to prevent uneven wear masking future hub noise.

Look after the hubs and the Mazda 3 stays quiet, tracks straight, and brakes predictably — just how it should feel.

How can someone tell whether a front or rear wheel hub is failing on a 2014 Mazda 3?

Noise that changes when gently weaving is a clue: if it gets louder turning left, the right-side hub is often the culprit (and vice versa). A front hub issue is usually more noticeable in the steering, while a rear hub tends to sound like a distant drone.

Raise the car safely, spin each wheel, and feel for roughness or play at 12 and 6 o’clock. Scan for ABS codes that might point to a specific corner.

Can the bearing be replaced separately from the hub on this model?

Many 2014 Mazda 3s have a bolt-on hub/bearing assembly at the rear. The front commonly uses a press-in bearing with a separate hub flange in the knuckle. Depending on variant and market, workshops may either press a new bearing into the knuckle or replace a complete hub unit.

Use the VIN to confirm the exact setup before ordering parts.

Is it safe to keep driving with a noisy hub?

It’s not recommended. A worn hub can overheat, affect braking and ABS behaviour, and in the worst case suffer internal failure. Short trips to reach a workshop are usually fine, but book replacement promptly to avoid collateral damage to the knuckle or sensor.