Toyota Hilux: KUN26 Front Upper Ball Joint Premature Wear

The front upper ball joints on the KUN26 double-wishbone suspension are documented to wear prematurely, particularly on vehicles used for towing, off-road work, or carrying sustained loads — all typical use cases for this platform. Worn upper ball joints create play in the steering geometry, producing a clunk over bumps and directional shimmy at highway speeds. Toyota issued a recall in Australia and a service campaign covering inspection and replacement of the upper ball joint assemblies on affected production runs.

• Clunking or knocking noise from front suspension when traversing bumps, dips, or steering lock
• Steering shimmy or vibration, particularly between 80-110 km/h
• Vehicle pulling to one side or vague and inconsistent steering feel
• Uneven or accelerated tyre wear on front inner or outer edges

With vehicle raised and front wheels off the ground, grasp each front wheel at 12 and 6 o'clock and attempt to rock it — any detectable play or clunk indicates ball joint wear. Visually inspect the upper ball joint boot for cracking or grease extrusion. Test drive at highway speed to assess for shimmy.

Parts involved: Ball joint.

$350 to $950 at New Zealand independent workshop rates. That is for this job on its own, not for the car.

An estimate, in NZD, for the repair as normally carried out. What a specific car costs depends on which part has failed and what it damaged on the way — treat this as the floor for a negotiation, not a quote.

• “Has the Toyota upper ball joint recall or service campaign been completed on this vehicle?”
• “Has any steering shimmy or front-end clunking over bumps been noticed?”
• “When were the front suspension components last inspected or replaced?”

The failure described above is documented in published sources — owner forums, technical service bulletins, recall notices and workshop write-ups — held in our fault database. The inspection instructions and the cost estimate are KickTyres’ own interpretation of them, and it is a starting point for an inspection rather than a manufacturer statement.