Parts for your 2010 Toyota Land cruiser-Tx valve

2010 Toyota Land Cruiser TX Valve (Thermostatic Expansion Valve)

Based on technical references including Toyota’s Land Cruiser 200 Series Repair Manual (Air Conditioning – Cooling Unit – Cooler Expansion Valve procedures), Toyota’s Electronic Parts Catalogue for UZJ200/VDJ200 (listing “Cooler Expansion Valve, Front” and, on dual A/C models, “Cooler Expansion Valve, Rear”), and DENSO air-conditioning service literature for TXV-type systems, the 2010 Toyota Land Cruiser is fitted with a TX valve. Many 200 Series with rear aircon have two valves—one at the front evaporator and another at the rear unit.

This TX valve is the metering heart of the Land Cruiser’s A/C system. It regulates how much liquid refrigerant enters the evaporator based on outlet temperature and pressure, keeping superheat in the sweet spot so the cabin cools quickly without flooding the compressor. On the 2010 model, the front valve is a block-type unit mounted at the evaporator (no fiddly external sensing bulb), and on dual A/C variants there’s a matching rear valve serving the rear evaporator.

As part of regular servicing, the TX valve isn’t a scheduled replacement item, but it relies on the rest of the system being healthy. Good practice includes: keeping the condenser clean, replacing the cabin filter on time, and ensuring any refrigerant work is done with the correct R‑134a charge by weight. A TX valve can stick or go lazy if moisture or debris gets in, so any time the system’s opened, a vacuum and proper dehydration are essential, and replacing the drier/desiccant (integrated with the condenser on many 200 Series) is smart policy.

Signs the TX valve may be playing up include slow or uneven cooling, frosty lines at the firewall, short cycling, or vent temps that swing hot–cold. On vehicles with rear A/C, the rear may behave differently to the front if only one valve is affected. A competent A/C tech will confirm with pressure readings and superheat checks rather than guessing.

Replacement is straightforward for a pro but fiddly at home: the system must be recovered, the valve unbolted from the evaporator block, O‑rings renewed and lightly lubricated with the correct oil (typically ND‑Oil 8/PAG 46, following Toyota specs), then reassembled, evacuated and recharged to the exact spec. It’s also worth leak-testing with nitrogen and performing a proper vacuum hold. In Australia and New Zealand, A/C work must be carried out by a licensed technician—great for peace of mind and to protect that tough-as-nails 200 Series compressor.

• Best practice when replacing a TX valve:
  • Use genuine-quality O‑rings and torque fasteners correctly.
  • Replace the desiccant/drier if the system’s been open.
  • Charge by weight and verify superheat and vent temps.

Popular questions about the 2010 Toyota Land Cruiser TX valve

Does a 2010 Land Cruiser have one or two TX valves?

Most 200 Series with only front aircon have one TX valve at the front evaporator. Models with rear A/C (common on higher trims) use a second TX valve for the rear evaporator. If the rear cabin cools differently to the front, it can hint that only one of the two valves is misbehaving.

Your VIN or build spec will confirm whether rear A/C is fitted, any Toyota parts counter or a glance at the rear quarter interior trim (for the rear unit) helps tell the story.

What symptoms point to a failing TX valve on a 200 Series?

Expect slow cooldown, temperature swings at the vents, frosting on the evaporator pipes near the firewall, compressor short cycling, or low suction/high head pressures when checked with gauges. On dual A/C models, the rear zone may act up independently.

Because similar symptoms can come from low refrigerant or a restricted condenser, a proper diagnostic with gauges, thermometer, and superheat readings is the way to separate a lazy TX valve from other issues.

Can the TX valve be cleaned or should it be replaced?

If contamination has caused the valve to stick, “cleaning” is rarely reliable. The better fix is to replace the TX valve, address the root cause (moisture, debris, incorrect oil), and renew the drier/desiccant. After replacement, evacuate thoroughly and recharge to spec.

Trying to flush a faulty TX valve in place often leads to repeat comebacks. Given the labour to recover and recharge, a new quality valve is typically the smarter, longer-term play.