Parts for your 2015 Subaru Exiga-Wheel hubs

2015 Subaru Exiga wheel hubs: what they do and how to look after them

Wheel hubs are absolutely used on the 2015 Subaru Exiga. Technical references including the Subaru Global Service Information (STIS) YA-series Exiga service manual (Suspension/Drive Shaft sections), the Subaru FAST electronic parts catalogue, and major bearing makers’ hub-unit catalogues for YA5/YA9 confirm the Exiga runs bolt-on, sealed hub-and-bearing assemblies front and rear, with integrated ABS encoder rings and five-wheel studs (5x100).

On the Exiga’s Symmetrical AWD platform, each hub unit anchors the wheel to the knuckle, houses the precision bearing, provides the mounting studs for the wheel, and feeds wheel-speed data to the ABS/Vehicle Dynamics Control. Because the bearing is built into the hub, it’s a sealed, non-serviceable part: when worn, the entire hub assembly is replaced.

There’s no scheduled greasing or adjustment, but regular servicing should include checks for roughness, play, and sensor damage. Typical signs it’s time for new hubs include:

• A humming or droning that rises with road speed and may change when cornering
• ABS/VDC warning light or erratic speed-sensor readings
• Disc runout, wheel wobble or uneven tyre wear
• Excess heat around the hub after a drive

Replacement on the Exiga is a straightforward bolt-off/bolt-on job, though corrosion can make hubs stubborn. Expect to remove the calliper and rotor, unplug the ABS sensor, undo the axle nut, then unbolt the hub from the rear of the knuckle. Refitting needs proper cleaning of mating faces, correct orientation for the ABS encoder, and all fasteners torqued to Subaru specifications. Replace single-use hardware like the axle nut and cotter pin, and avoid rattle-gunning the axle nut. If a front hub is replaced, a wheel alignment check is a smart add-on.

Good practices that help hubs last include:

• Using quality tyres and keeping pressures even
• Tightening wheel nuts to the correct torque, not “as tight as possible”
• Washing off coastal salt and road grime, especially in NZ conditions
• Inspecting ABS sensor wiring after off-road or gravel use

Many Exiga hubs run well past 150,000 km, but rough roads, big potholes, over-torqued wheel nuts, or water ingress can shorten that. Stick with reputable OEM-equivalent hub units for best longevity and quiet running.

Popular questions

Does the 2015 Subaru Exiga use separate bearings or complete hub assemblies?
It uses integrated hub-and-bearing units at both ends. The bearing isn’t serviced on its own