Rear Differential Lock Air Pump (4WD Locker Compressor)

This pneumatic pump is a key helper for your 4x4 rear diff lock system. When you press the locker switch, it builds air pressure and sends it through small hoses to the rear differential actuator. The actuator then slides the locking mechanism, making both rear wheels turn together for maximum traction on mud, sand, or rocks

Why this part is needed

Without steady air pressure, the locker cannot engage fully. This pump ensures fast engagement, stable holding pressure, and reliable disengagement when you return to normal driving.

How it works

• Electric motor spins an internal compressor.
• Pressure is routed via valves and lines to the diff lock actuator.
• System maintains pressure until the locker is released.

What happens if it fails

A weak or dead pump can cause the locker light to blink, slow engagement, or no lock at all. You may hear constant running, hissing leaks, or notice the locker disengaging under load. Driving with a half-engaged locker can accelerate gear wear and leave you stuck when traction is needed most ⚠️

Compatible models

• Pajero
• Pajero/Montero<Long>
• Pajero/Montero<Short>
• Pajero/Montero