Parts for your 2011 Mitsubishi Lancer-Tx valve

2011 Mitsubishi Lancer TX Valve: What It Does and How to Look After It

Yes, the 2011 Mitsubishi Lancer is fitted with a thermostatic expansion valve (TX valve). This isn’t guesswork—Mitsubishi’s Lancer CJ/CY/CZ service manual (Group 55A: Heating, Ventilation and Air Conditioning) identifies the A/C expansion valve mounted at the evaporator inlet, and the Mitsubishi ASA electronic parts catalogue lists an air conditioner expansion valve for these models. Major aftermarket catalogues for the 2008–2015 Lancer also specify a TX valve, not an orifice tube.

The TX valve’s job is to meter R‑134a into the evaporator so the system cools efficiently under different conditions. It reacts to evaporator outlet temperature and pressure, keeping superheat in the sweet spot so the evaporator doesn’t ice up and the compressor isn’t fed liquid refrigerant. In short, it helps the Lancer’s A/C stay cold at the lights and on the motorway, in a Tassie winter or a Top End summer.

When a TX valve plays up, the cabin can swing from chilly to lukewarm, pressures on the gauges may wander, and you might see frost or sweating near the evaporator connections. Contamination (moisture, debris from a tired compressor) can make the valve stick or restrict flow.

For servicing, a licensed A/C technician (ARCtick in AU, appropriately certified in NZ) should handle any refrigerant work. Typical best practice on a Lancer includes:

• Recovering refrigerant, then accessing the valve at the evaporator (behind the glovebox area on most trims).
• Replacing the TX valve with quality parts, fitting new O‑rings lubricated with the correct PAG oil.
• Renewing the receiver‑drier or desiccant bag (where applicable), and flushing lines if there’s compressor debris.
• Evacuating, leak‑testing, and recharging with R‑134a to the under‑bonnet label amount, using the specified oil type/quantity for the vehicle.

There’s no scheduled replacement interval for the TX valve—treat it as “replace on condition.” To help it live a long life: run the A/C for 10–15 minutes weekly to keep seals and the valve happy, keep the condenser clean of bugs and fluff, replace the cabin filter regularly, and make sure the radiator fans kick in when the A/C is on.

Technical confirmation sources: Mitsubishi Motors Lancer CJ/CY/CZ Service Manual (Group 55A, HVAC), Mitsubishi ASA EPC component listings for A/C expansion valve on 2007–2015 Lancer, and major aftermarket catalogues specifying a TX valve for MY2011 Lancer.

Where is the TX valve on a 2011 Lancer?

It’s mounted at the evaporator inlet inside the HVAC case, typically accessed from the passenger side after removing the glovebox and related trim. The refrigerant pipes pass through the firewall to this point. Expect tight quarters and delicate sensors nearby.

Does a TX valve need regular replacement?

No set interval. It’s replaced if faulty, contaminated, or when an A/C system has suffered a compressor failure. When the system is opened, good practice is to renew O‑rings and the receiver‑drier or desiccant bag.

What refrigerant and oil does it use?

The 2011 Lancer uses R‑134a. The correct charge weight and PAG oil type/amount are on the under‑bonnet label and in the service manual. Don’t guess—charge by weight and use the specified oil to avoid damaging the compressor or TX valve.