Parts for your 2003 Mitsubishi Pajero-Wheel bearings

2003 Mitsubishi Pajero wheel bearings — purpose, care, and when to replace

Wheel bearings are absolutely fitted to the 2003 Mitsubishi Pajero (NM/NP series) and they’re very much relevant to safe, smooth motoring. The Mitsubishi Factory Service Manual for NM/NP models (Group 26: Front Axle and Group 27: Rear Axle) specifies sealed, double‑row hub bearings, with no routine adjustment. Gregory’s Pajero NM–NP 2000–2006 manual and the Haynes Montero/Pajero 2001–2012 manual echo this: the Pajero uses sealed‑for‑life hub bearings at both ends, replaced as an assembly when worn. Mitsubishi’s ASA parts catalogue also lists hub-and-bearing units for front and rear, confirming the design.

On this Pajero, wheel bearings let the wheels spin freely on the hubs while carrying the vehicle’s weight and coping with cornering loads, off‑road punishment, and plenty of Aussie and Kiwi kilometres. Being sealed units, they keep grease where it’s needed and road grit and water out, which is ideal for a 4WD that sees beach runs and corrugations.

Whilst there’s no regular greasing or preload setting to do, they still deserve attention during servicing. A quick check can stop a small rumble from turning into a big bill.

• Common signs they’re tired: a humming or growling that rises with speed, a rhythmic rumble that changes when weaving slightly, looseness felt when rocking the wheel at 12 and 6 o’clock, ABS warnings after severe play, and uneven tyre wear.
• Good service habits: at each service or tyre rotation, spin and listen at each corner, check for play, and feel for roughness. After water crossings or beach work, rinse the underbody and hubs with fresh water and avoid blasting directly at the hub seals.

Replacement on the 2003 Pajero is straightforward for a pro and doable for a well‑equipped DIYer: the hub/bearing is removed and replaced rather than rebuilt. The front typically involves removing the calliper and disc, undoing the axle/hub fasteners, and pressing or unbolting the unit depending on variant. The rear is a sealed hub bolted to the knuckle. Always follow the factory torque specs, use new axle/hub nuts where specified, and consider replacing in axle pairs if one side has failed. Quality parts (OEM, Koyo, NTN, SKF, Timken) are worth it for quiet running and long life.

Expect long service life on-road, frequent heavy towing, corrugations, or deep water can shorten it, so inspection intervals should match how the Pajero is used.

Do 2003 Mitsubishi Pajero wheel bearings need regular greasing?

No. The NM/NP Pajero uses sealed-for-life hub bearings, so there’s no provision for periodic greasing or preload adjustment. Servicing means inspecting for noise or play and replacing the hub/bearing unit if it’s worn.

What are the tell-tale signs a Pajero wheel bearing is failing?

Think steady humming that rises with speed, rumbling that changes when gently weaving, and detectable play when rocking the wheel at 12 and 6 o’clock. In advanced cases you might see ABS warnings or uneven tyre wear as the hub wobbles.

Is it safe to keep driving with a noisy wheel bearing?

Not really. A noisy bearing can quickly deteriorate, create heat, damage the hub and sensor rings, and in extreme cases jeopardise wheel retention. It’s best to book it in promptly and avoid long highway runs or heavy loads until it’s sorted.