Parts for your 2016 Mitsubishi Lancer-Tx valve

2016 Mitsubishi Lancer TX Valve – what it does and when to replace it

Based on technical sources, the 2016 Mitsubishi Lancer is fitted with a thermal expansion valve (TXV). Mitsubishi Motors’ Lancer CF/CK Workshop Manual (HVAC – Air Conditioning) details the “expansion valve” at the evaporator inlet, the Mitsubishi ASA electronic parts catalogue lists an A/C expansion valve for 2016 Lancer variants, and major aftermarket catalogues (DENSO, Four Seasons) specify a direct-fit TXV for this model.

The TX valve meters refrigerant into the evaporator based on superheat, keeping the evaporator cold without icing and helping the cabin reach and hold the temp set on the climate control. On the Lancer, it’s a block-style valve mounted at the evaporator, with the lines passing through the firewall. When it’s behaving, you get quick cool-down, stable vent temps and a happy compressor.

Typical clues a TXV is playing up include weak cooling at idle, frosty or sweating lines at the firewall, fluctuating vent temps, a hissing or whooshing from the valve area, or pressure readings that don’t make sense. These symptoms can mimic low refrigerant, so proper diagnosis with gauges, temp probes and, ideally, a recovery machine is the go.

It isn’t a routine service item, but it’s smart to consider a TXV replacement if the system’s been contaminated (compressor failure, desiccant breakdown) or if there’s evidence of a stuck valve. Best practice when replacing the Lancer’s TXV includes:

• Recovering refrigerant and replacing the receiver-drier/desiccant bag.
• Accessing the valve behind the glovebox/evaporator housing and disconnecting lines at the firewall.
• Fitting new OEM-quality O-rings, adding the correct PAG oil balance, and torquing fasteners properly.
• Evacuating, then recharging by weight with the specified refrigerant (typically R-134a in AU/NZ—confirm the under-bonnet label).
• Leak-testing and verifying superheat/vent temps.

Expect around 1–2.5 hours labour plus an A/C regas, parts usually sit in the $80–$200 AUD/NZD range depending on brand. Because refrigerant handling is regulated, have it done by an ARCtick-licensed tech in Australia or a qualified NZ technician. As part of ongoing care, get the system performance-checked every couple of years, keep the condenser clean, and replace the cabin filter so airflow across the evaporator stays strong—your TXV will thank you.

Popular questions

Where is the TX valve on a 2016 Lancer?
It’s mounted on the evaporator assembly, effectively at the firewall. Access is from inside the cabin behind the glovebox area, while the refrigerant pipes are disconnected in the engine bay. No full dash-out is usually required, but trims and the glovebox come off.

How do I tell if the TX valve or low gas is the problem?
Low gas often gives steady but weak cooling and visible oil/dye at a leak point. A dodgy TXV tends to cause cycling temps, line frosting at the firewall, and odd high/low-side pressures even when the charge is correct. Proper diagnosis with gauges and a recovery machine is the best way to tell.

Do TX valves need regular replacement?
Not routinely. Replace if it’s sticking, leaking, or after major compressor/contamination events. When replacing, always renew the receiver-drier and O-rings, evacuate, and recharge by weight to protect the compressor and restore performance.