Parts for your 2019 Toyota Mark x-Wheel hubs

2019 Toyota Mark X wheel hubs — purpose, service and replacement

Wheel hubs are absolutely used on the 2019 Toyota Mark X. Technical references including the Toyota Electronic Parts Catalogue (GRX130/GRX135, final production 2019), the Toyota Repair Manual (Axle/Hub and Suspension sections), and mainstream bearing catalogues from OEM suppliers (e.g., NTN, SKF) all list bolt-on hub and bearing assemblies for both front and rear. The front units carry the wheel studs and integrated bearing, the rear units incorporate the bearing and the ABS encoder, with variants for 2WD (GRX130) and 4WD (GRX135).

On this Mark X, each hub assembly does the heavy lifting of supporting vehicle weight, keeping the wheel true, and letting it spin smoothly. It’s also the mounting face for the brake rotor and wheel, and on the rear it provides the signal for ABS/ESC via an integrated encoder. Being a sealed, unitised design, there’s no periodic greasing, instead, good servicing is about inspection, correct fastener torque, and protecting the assembly from impact and contamination.

Owners typically notice a tired hub by a low droning that follows road speed, slight vibration through the seat or floor, or an ABS light if the encoder/sensor interface is unhappy. Left to worsen, a worn hub can affect braking feel, chew out tyres, and add stress to suspension components.

• Inspection cues: listen for a hum that changes when gently weaving at highway speed, feel for roughness or notchiness when the wheel is spun off the ground, and check for play at 12 and 6 o’clock.
• Replacement tips: use new hub bolts/axle nut where specified, keep the hub face spotless so the rotor and wheel sit dead flat, and follow the Mark X repair manual torque specs to the letter. Avoid rattle-gunning wheel nuts—over-torque is a bearing killer.
• Service habits: torque wheel nuts evenly, avoid kerb strikes, and consider earlier checks if running wider wheels or low-profile tyres on rough Kiwi or Aussie roads.

On kilometre-heavy Mark X examples, hubs can become noisy anywhere from roughly 120,000–200,000 km depending on use. Technicians usually replace the noisy side first, doing both sides on the same axle can make sense if the vehicle has identical age and use on each side. Always reconnect and route ABS sensor leads carefully and confirm no contact with rotating parts. A short road test on smooth and coarse-chip surfaces helps confirm a quiet, tight result.

Popular questions

Q: What are the common signs of a failing 2019 Mark X wheel hub?

A: A steady humming or growl that gets louder with speed, a change in tone when gently steering left-right, faint vibration through the seat, and in some cases an ABS/traction light point to a hub issue. Jacked up, the suspect wheel may feel rough when spun or show slight play at the rim.

Q: Do the front and rear hubs differ on a 2019 Mark X?

A: Yes. The front is a bolt-on hub and bearing unit with wheel studs. The rear hub also integrates the bearing but includes an encoder for ABS/ESC. Part designs vary between GRX130 (RWD) and GRX135 (4WD), so matching by VIN in the Toyota EPC is the safe move.

Q: Is it safe to keep driving with a noisy hub?

A: It’s not ideal. Continued driving can increase bearing heat, affect braking consistency, accelerate tyre wear, and in extreme cases risk further damage. Prompt replacement restores quiet running and keeps the Mark X tracking straight and stable.