Parts for your 2018 Subaru Exiga-Wheel hubs

2018 Subaru Exiga wheel hubs

Wheel hubs are absolutely relevant and fitted to the 2018 Subaru Exiga. Technical sources such as the Subaru Factory Service Manual (FSM) for the Exiga/Crossover 7 (Front Axle and Rear Axle sections) specify bolt-on hub unit bearings at each corner with integrated wheel studs and ABS encoder rings. Subaru’s official electronic parts catalogues (FAST/Microcat) also list complete front and rear hub assemblies for the 2018 model, confirming the design and service approach.

On the 2018 Exiga, the wheel hubs do the heavy lifting behind the scenes. Each hub unit supports the vehicle’s weight via a sealed bearing, locates the wheel with press-fitted studs, interfaces with the brake rotor, and provides the encoder signal for the ABS/vehicle dynamics system. Being a sealed “hub unit bearing”, it’s maintenance-light: there’s no regreasing schedule, and when wear sets in, the whole assembly is replaced rather than rebuilt.

Owners will usually first notice a worn hub as a low, speed-dependent humming that changes on gentle steering input, a faint vibration through the cabin, or play when rocking the wheel at the 12 and 6 o’clock positions. An illuminated ABS light or erratic speed readings can also stem from a damaged encoder ring in the hub. Tyre roar can mimic hub noise, so a proper road test and on-hoist inspection are smart before ordering parts.

During servicing, a technician should check for bearing play, roughness when the wheel spins, uneven tyre wear, and any ABS faults. If replacement’s on the cards, the Exiga’s hub units are designed to unbolt from the knuckle, with the driveshaft passing through the front hubs. Good practice includes: cleaning the mating face so the new hub sits perfectly square, avoiding hammer blows through the bearing path, torquing the axle nut and wheel nuts to factory spec with a torque wrench, and inspecting the ABS sensor and wiring for damage or corrosion. Wheel alignment usually isn’t required unless the knuckle or strut bolts have been disturbed, but it’s wise to check if suspension hardware has been loosened.

Quality hub assemblies matter. Cheap units can introduce rumble within a few thousand kilometres, so sticking with reputable OEM-equivalent brands is a sound plan. Replacing hubs “in pairs” isn’t mandatory, though if both fronts have similar age and kilometres, many workshops will recommend doing both to save a second visit down the track. With correct installation and sane wheel-nut torque, a new hub should deliver years of quiet, confident running—just what an all-rounder like the Exiga is built for.

• Typical signs of trouble: humming with speed, wheel play, ABS warning, uneven tyre wear.
• Care tips: avoid kerb hits, torque wheel nuts correctly, and keep the hub/rotor mating faces clean.

Popular questions about 2018 Subaru Exiga wheel hubs

How do they tell a failing hub from noisy tyres?
A technician will road test at different speeds and gently weave to load each side. Hub noise often changes when loading one side, tyre noise usually doesn’t. On a hoist, they’ll spin the wheel and feel for roughness, and check bearing play at the rim. Rotating tyres front-to-rear is another quick cross-check.

Do Exiga wheel hubs need regular servicing?
They’re sealed hub unit bearings, so there’s no periodic regreasing. During routine servicing, the check is inspection-only: listen for rumble, feel for play, and scan for ABS faults. If worn, the whole hub assembly is replaced.

Should both hubs be replaced at once?
Not strictly. If only one hub is noisy or loose, replacing that side is fine. However, if both fronts or both rears have similar age and kilometres, many workshops recommend doing them together to minimise downtime and return visits.