Parts for your 2003 Toyota Highlander-Wheel hubs

2003 Toyota Highlander (Kluger) Wheel Hubs — What They Do and When to Replace

Wheel hubs are absolutely fitted to the 2003 Toyota Highlander (sold locally as the Kluger). Technical references including the Toyota Repair Manual for the Highlander/Kluger (XU20 series, 2001–2007), axle hub and bearing sections, the Toyota Electronic Parts Catalogue (EPC) for MCU23/25/28 models, and aftermarket manuals such as the Haynes Toyota Highlander & Lexus RX300 manual all list front “axle hub sub-assemblies” and rear “axle hub & bearing assemblies” for this vehicle, with ABS-compatible designs for both 2WD and AWD variants. Those sources confirm the Highlander uses unitised hub-and-bearing assemblies at each corner, not separate serviceable (tapered) bearings.

On this model, the hub is the solid mount that carries the wheel studs and houses the sealed bearing. It keeps the wheel centred, lets it spin smoothly, and provides the tone/encoder ring interface for the ABS. Up front, the hub bolts to the steering knuckle and the CV stub passes through, at the rear, the assembly bolts to the rear carrier, with a drive axle on AWD and a non-driven arrangement on 2WD.

There’s no fixed replacement interval — hubs are “service on condition.” As part of routine servicing (say every 10,000–15,000 km with tyre rotations), it’s smart to check for bearing roughness, play and noise. Tell-tales include a low rumble that changes with road speed, a growl when loading one side in a gentle swerve, ABS warning lights, heat at the hub after a drive, or uneven tyre wear. Also keep wheel studs clean and always torque the wheel nuts correctly (Toyota spec typically around 103 N·m), as over-tightening can shorten bearing life.

When replacement’s due, quality matters. Use hubs that match the VIN and drivetrain (2WD vs AWD) and the correct ABS encoder type. The job involves removing the caliper and rotor, disconnecting the ABS sensor, taking off the axle nut (where fitted), and unbolting the hub from the knuckle/carrier. Avoid hammering on the inner race, protect the sensor and harness, and always follow Toyota torque specs in the factory manual for the axle nut, hub bolts and caliper hardware. A wheel alignment check afterwards is a good shout, especially if the knuckle was disturbed.

Coastal use, frequent water crossings and heavy loads can accelerate wear. Choosing OEM or reputable OE-supplier hubs and fitting new mounting bolts and dust caps where specified will help the Highlander/Kluger stay quiet, safe and compliant on Kiwi and Aussie roads.

• Signs a hub is failing: humming/rumbling that follows road speed, play at 12-and-6 o’clock, ABS light, heat around the hub.
• Service tip: inspect during every rotation, correct wheel-nut torque and intact dust shields keep hubs happier for longer.

References: Toyota Repair Manual (Highlander/Kluger XU20 series, axle hub and bearing sections), Toyota Electronic Parts Catalogue for MCU23/25/28 (front axle hub sub-assembly and rear axle hub & bearing assembly listings), Haynes Repair Manual for Toyota Highlander & Lexus RX300 (hub/bearing procedures).

Popular questions

How can someone tell if their 2003 Highlander/Kluger hub is bad or it’s just tyre noise?
A worn hub usually makes a steady rumble or growl that gets louder with speed and often changes when gently swerving left or right to load/unload the bearing. Feathered or cupped tyres can drone too, but rotating tyres front-to-rear without the noise moving is a clue the hub is the culprit. Any play at the wheel when rocked at 12-and-6 o’clock, or heat at the hub after a drive, also points to the bearing.

Are the front and rear hubs the same between 2WD and AWD?
No. The front hubs are similar across drivetrains, but rears differ: AWD has a driven rear hub with a CV shaft through it, while 2WD has a non-driven rear hub. Part numbers and ABS encoder arrangements vary, so it’s important to match by VIN and driveline.

Is it safe to keep driving with a noisy hub?
It’s risky. A failing hub can get hot, affect ABS behaviour and braking stability, and in extreme cases develop excessive play. It’s best to plan prompt replacement to protect tyres, brakes and suspension components — and to keep the Highlander/Kluger tracking straight.