Parts for your 2005 Mitsubishi Pajero-Tx valve

2005 Mitsubishi Pajero TX Valve: Fitment, Purpose, and Service Tips

Yes, a TX valve is used on the 2005 Mitsubishi Pajero. Technical references including the Mitsubishi Motors Pajero/Montero Workshop Manual (HVAC Group 55), the Mitsubishi ASA electronic parts catalogue, and DENSO air-conditioning system literature identify a thermostatic expansion valve (TXV) at the evaporator inlet on this model’s R134a air-con system.

On the 2005 Pajero, the TX valve meters refrigerant into the evaporator based on temperature and pressure, keeping superheat in the sweet spot so the cabin stays cool without icing up. It works hand-in-glove with the DENSO variable-displacement compressor, steadying vent temps at idle and under load, whether it’s towing up the Kaimais or crawling a bush track in WA.

It’s not a routine replacement item, but it’s critical for reliable cooling. A crook TX valve can show up as warm air at idle, intermittent cooling, frost on lines, a noisy hiss at the firewall, or odd high/low gauge pressures. Because it sits at the evaporator—typically behind the glovebox on the Pajero—replacement is a bit fiddly and best left to a licensed A/C tech. The job requires safely recovering the refrigerant, removing trims to access the evaporator housing, swapping the valve, and renewing green HNBR O-rings.

Smart servicing while you’re in there includes:

• Replace the receiver/drier whenever the system is opened or after a compressor event.
• Vacuum, leak-test, and recharge with the correct R134a charge and specified PAG oil.
• Fit a fresh cabin filter to help airflow and reduce evaporator icing.
• Inspect for UV dye traces and oil staining at the firewall fittings and under the dash.

DIY owners can check basics—cabin filter condition, condenser cleanliness, and that both condenser fans kick in with the A/C. But cracking lines or changing the TX valve itself needs pro gear and certification. When done right, a new TXV restores crisp, even cooling and protects the compressor from liquid slugging—a small part doing a big job in the Pajero’s tough, DENSO-built air-con setup.

Where is the TX valve on a 2005 Pajero?

It’s mounted at the evaporator inlet, typically accessed behind the glovebox area. The refrigerant pipes pass through the firewall to this point. Access involves trim removal and should be handled by a licensed A/C technician due to refrigerant recovery requirements.

What are the signs the TX valve needs replacing?

Common clues include weak cooling at idle, sudden temperature swings, frosting on the low-side line, a sharp hiss near the firewall, and abnormal gauge readings. If the compressor has failed or the system’s been contaminated, replacing the TX valve and receiver/drier together is good practice.

Does the TX valve need regular servicing?

It doesn’t have a scheduled replacement interval. Think of it as “inspect when the system is opened” or when symptoms appear. Any time the A/C is opened up, renew O-rings, replace the receiver/drier, and ensure the correct refrigerant charge and oil are used to extend TXV and compressor life.