Parts for your 2020 Mazda 3-Wheel bearings

2020 Mazda 3 Wheel Bearings

Technical sources confirm the 2020 Mazda 3 is fitted with wheel bearings. The Mazda Workshop Manual for the BP-platform Mazda 3 (2019–) details front and rear hub-and-bearing units, and Mazda’s Electronic Parts Catalogue lists sealed wheel hub assemblies for this model. These are integrated, maintenance-free bearings that support the wheel hubs and interface with the ABS wheel-speed system.

On a 2020 Mazda 3, the wheel bearings sit inside bolt-on hub assemblies. Their job is simple but critical: they let the wheels spin smoothly with minimal friction, carry the vehicle’s weight, and keep everything aligned so the tyres wear evenly and the car tracks straight. Because they’re sealed units, there’s no greasing or adjustment during routine servicing—when they wear, they’re replaced as a complete hub assembly.

As part of regular servicing, it’s good practice for a technician to road test for bearing noise and then check for play with the car safely lifted. Catching issues early protects tyres, brakes, and suspension from knock-on damage. Typical warning signs include:

• A humming or growling that rises with road speed or changes during gentle lane changes
• Looseness felt at the wheel when rocked at the 12 and 6 o’clock positions
• ABS warning light or inconsistent wheel-speed readings (the encoder is built into many hub units)

If a bearing is noisy or loose, replace the affected hub assembly. On the Mazda 3, that means unbolting the hub from the knuckle and, on driven wheels, sliding it off the driveshaft spline. Quality parts and correct torque are vital for long life and ABS reliability. While it’s not mandatory to do both sides, some owners choose to replace bearings in pairs if the kilometres are high.

How long do they last? Many see well over 100,000 kilometres, but rough roads, kerb strikes, potholes, oversized wheels, and water ingress can shorten their life. Keeping tyres correctly inflated, avoiding impacts, and having the suspension inspected on schedule all help bearings live longer. After replacement, a quick road test to verify noise is gone and ABS data is clean is the go. Alignment isn’t usually affected unless the knuckle was disturbed, but it’s smart to check if tyres show uneven wear.

How long do wheel bearings last on a 2020 Mazda 3?

With normal driving, many owners see more than 100,000 kilometres. Lifespan depends on road quality, driving style, wheel/tyre setup, and exposure to water or grit. Regular checks during scheduled services help catch early wear before it affects tyres or braking.

Can a worn wheel bearing damage other parts?

Yes. Excess play and heat can accelerate tyre wear, stress the CV joint or brake components, and in some cases trigger ABS faults because the hub’s encoder ring or sensor reading is affected. Replacing a noisy or loose bearing promptly prevents collateral damage.

Do the wheel bearings need greasing during service?

No. The 2020 Mazda 3 uses sealed hub-and-bearing units that are not serviceable. There’s nothing to lubricate—if they’re worn or noisy, the complete hub assembly is replaced. Servicing focuses on inspection, road testing, and correct installation when replacement is needed.