Parts for your 2001 Mitsubishi Pajero-Receiver driers

2001 Mitsubishi Pajero receiver-drier: what it does and when to replace it

Technical sources including the Mitsubishi Pajero/Montero 2001 Workshop Manual (HVAC/Group 55), the Mitsubishi ASA parts catalogue for NM/NP series, and major aftermarket catalogues from Denso and Nissens all list a receiver‑drier for the 2001 Mitsubishi Pajero. That means this model does use a receiver‑drier on the air‑conditioning system (R134a, TXV-type). It’s fitted on the high‑pressure side, typically near the condenser, to keep moisture and debris out of the system.

On the 2001 Pajero, the receiver‑drier does a few simple but vital jobs: it stores liquid refrigerant, filters out fine particles, and uses desiccant to absorb moisture that sneaks in when components are opened or seals age. Moisture is the enemy in A/C systems—it forms acids, corrodes internals, and can freeze into ice that chokes the expansion valve. Keep the drier healthy and the Pajero’s A/C will cool harder, last longer, and be far less likely to lunch a compressor.

As part of servicing, the receiver‑drier should be replaced whenever the system’s been opened to atmosphere (e.g., condenser, hose or compressor work), after a compressor failure, or if there’s known contamination. In hot Aussie and Kiwi conditions, many techs also treat it as preventative maintenance every few years, especially on older vehicles like the NM Pajero, to protect the expansion valve and compressor.

• Always replace the drier with new O‑rings, lightly lubricated with the correct PAG oil for the Pajero’s compressor.
• Have an ARCtick‑licensed technician recover any refrigerant, fit the new drier, evacuate under deep vacuum (30–45 minutes), nitrogen leak‑test, then weigh in the specified R134a charge shown on the under‑bonnet label.
• If the system’s been open for days, assume the old drier is saturated and bin it—desiccant can’t be reliably “dried out” once exposed.
• After compressor failure, add an in‑line filter where appropriate and flush lines and condenser if the design allows, otherwise, replace the condenser if it’s the parallel‑flow type that can’t be flushed effectively.

Done right, a fresh receiver‑drier is cheap insurance that keeps the Pajero’s A/C frosty and the compressor happy for the long haul.

Popular questions

How do you know the receiver‑drier needs replacing on a 2001 Pajero?
Tell‑tales include weak cooling after recent A/C work, rapid moisture return in the system, pressure readings that don’t stabilise properly, or a noisy/straining compressor. If the system’s been opened, just plan to replace it—it’s standard practice to protect the expansion valve and compressor.

Do you have to change the receiver‑drier every time the A/C is opened?
Yes—best practice is to replace it any time the circuit’s opened to air, after a leak repair, or following compressor failure. The desiccant saturates quickly once exposed, and a saturated drier can’t safeguard the system from moisture and acid formation.

Where is the receiver‑drier on a 2001 Pajero?
It’s on the high‑pressure side of the A/C plumbing, commonly mounted near or on the condenser assembly at the front of the vehicle. Exact placement can vary by engine and market spec, so checking the service manual or following the high‑pressure line from the condenser will pinpoint it.