Parts for your 2022 Toyota Land cruiser-Tx valve

TX valve on the 2022 Toyota Land Cruiser 300

Yes, the 2022 Toyota Land Cruiser 300 Series runs a TX valve (thermostatic expansion valve) in its air-con system. Toyota’s service literature for the 300 Series Heating/Air Conditioning section details “cooler expansion valve” removal/installation procedures, and the Toyota Electronic Parts Catalog lists an “expansion valve sub-assembly” for the front cooler and, on dual A/C models, a separate rear valve. This aligns with common modern OEM practice noted in automotive A/C design guides and SAE references, where large SUVs with dual-zone or rear A/C use TXV-based systems rather than fixed orifice tubes.

The TX valve’s job on a 2022 Land Cruiser is to meter refrigerant into the evaporator based on temperature sensed at the outlet, keeping the right superheat so the evaporator runs cold without flooding the compressor. That means steady vent temps, quick pull-down on hot days, and solid compressor protection out bush or around town. On LC300s with rear air, there’s typically a dedicated rear TX valve doing the same gig for the rear evaporator.

It’s not a routine service item, so no need to swap it on a schedule. Instead, think of it as “inspect if there’s a symptom.” Clues a TX valve’s unhappy include inconsistent cabin temps, evaporator icing, a faint hiss that never settles, poor cooling at idle but better on the move, or odd high/low-side pressures during a gauge check. A blocked desiccant, debris from a failing compressor, or moisture in the system can all make a TX valve stick or restrict.

If replacement is on the cards, it’s a pro-only task in Australia and New Zealand: refrigerant recovery, component R&,R, O-rings replaced and lightly oiled, correct torque on the fittings, evacuation to deep vacuum, and recharge by weight to the under‑bonnet label. The LC300 may use R‑1234yf or R‑134a depending on market—always match the label for type and charge mass. A post-job leak test and performance check seal the deal. While you’re there, it’s smart to assess the receiver-drier/desiccant (if serviceable), ensure the cabin filter’s fresh, and clean the condenser fins, all of that helps the TX valve do its best work.

Handy prevention tips:

• Run the A/C regularly year-round to keep seals lubricated.
• Replace the cabin filter on time to maintain airflow across the evaporator.
• Fix any refrigerant leaks promptly to avoid contamination that can foul the valve.

Popular questions about the 2022 Toyota Land Cruiser TX valve

Does the 2022 Land Cruiser 300 use a TX valve or an orifice tube?

The LC300 uses a TX valve (often listed by Toyota as a cooler expansion valve). Many models with rear A/C also have a second valve for the rear evaporator. This setup offers tighter control of evaporator superheat than a fixed orifice tube, which helps with stable cooling in varied Aussie and Kiwi climates.

What are the signs the TX valve is failing on a 300 Series?

Look for slow or uneven cooling, evaporator icing, cycling that feels off, or unusual gauge readings during an A/C test. If debris or moisture are in the system, the valve can stick or restrict. Because symptoms can mimic low charge or a weak condenser fan, a proper diagnostic by a licensed A/C tech is the best shout.

Can a DIYer replace the TX valve at home?

Best left to a licensed technician. In AU/NZ, refrigerant handling is regulated and the job needs recovery gear, vacuum equipment, accurate charging by weight, and leak testing. A pro will also replace O-rings, verify torque, and check for root causes like contamination so the fix actually lasts.