Parts for your 2000 Mitsubishi Pajero-Receiver driers

2000 Mitsubishi Pajero receiver-drier — what it does and when to sort it

Based on the Mitsubishi Pajero NM/NP (circa 2000) workshop manual HVAC section and the Mitsubishi ASA electronic parts catalogue, this model uses a TXV-style air‑conditioning system with a high‑side receiver‑drier. Major A/C parts catalogues from Denso and Nissens, along with common AU/NZ aftermarket listings (e.g., Jayair, Four Seasons), also specify a serviceable receiver‑drier for the 2000 Pajero. On many builds it’s mounted to, or integrated with, the condenser assembly up front.

On this Pajero, the receiver‑drier has three key jobs: it stores liquid refrigerant, filters out fine debris, and—crucially—uses desiccant to absorb moisture. Moisture inside an R134a system reacts with refrigerant and oil to form acids, which can corrode internals and turn oil into sludge. That’s why a healthy drier is cheap insurance for the compressor and expansion valve.

As a rule of thumb, the drier should be replaced any time the system is opened to atmosphere, after a compressor or condenser change, or if the system’s been left discharged. Most brands recommend installing the new unit as close as possible to evacuation and recharge—don’t unseal the new drier until you’re ready—so the desiccant doesn’t saturate prematurely.

• Typical signs it’s time: restricted or erratic cooling, obvious contamination in recovered oil, evidence of moisture (frosting/icing at the TXV), or after any major A/C repair.
• Best practice during service: replace the drier and associated O‑rings, pressure‑test with dry nitrogen, evacuate properly, and recharge with the exact R134a amount shown on the under‑bonnet label. Use the compressor oil type and quantity specified in the Pajero service data.

DIYers should note that on some 2000 Pajeros the drier is integrated into the condenser tank. If that’s the case, you replace the condenser assembly or the drier cartridge if it’s a serviceable insert. Always cap lines immediately when disconnected, torque fittings to spec, and finish with a leak check (UV dye or an electronic detector). For dual‑air models, follow the workshop procedures carefully—charge amounts and component layouts can differ.

Look after the receiver‑drier and the Pajero’s A/C will keep blowing crisp air on those long Aussie and Kiwi runs, with the compressor living a much happier, longer life.

• Where is the receiver‑drier on a 2000 Mitsubishi Pajero?
  On most 2000 models it’s located in the engine bay, mounted to or within the condenser at the front of the vehicle. Some versions use a bolt‑on canister on the condenser side tank, others have an internal cartridge. Access typically involves removing the grille or upper shrouds. Always confirm layout against the vehicle’s build code and the workshop manual illustrations.
• How often should the receiver‑drier be replaced?
  There’s no fixed time interval, it’s condition‑ and event‑based. Replace it whenever the system is opened, after compressor or condenser replacement, or if the system has been flat or exposed to air. If the A/C performance is inconsistent or there’s contamination/moisture evidence, a new drier is a smart move during diagnosis.
• Do I need a new drier when fitting a new compressor?
  Yes—industry practice and manufacturer guidance say to fit a new receiver‑drier with a new compressor. It protects the fresh compressor from residual moisture and debris, helps validate the repair, and supports warranty on many new compressors. Evacuate thoroughly and recharge to the exact R134a spec shown under the bonnet.