Parts for your 2017 Toyota Land cruiser-Tx valve

2017 Toyota LandCruiser TX Valve (Cooler Expansion Valve)

Technical sources confirm the 2017 Toyota LandCruiser 200 Series is fitted with a thermal expansion valve (TX valve), commonly called the cooler expansion valve. The Toyota Repair Manual for J200 (Air Conditioning – Cooler Expansion Valve, 2016–2019) outlines removal and installation for both front and, where equipped, rear units. The Toyota Electronic Parts Catalogue (EPC) for URJ202/VDJ200 lists the “cooler expansion valve” for the front evaporator and an additional valve for vehicles with rear air. DENSO service literature on variable-displacement compressors further describes TXV-regulated systems used by Toyota in this model range.

On a 2017 LandCruiser, the TX valve’s job is to meter refrigerant into the evaporator based on temperature and pressure, keeping evaporator superheat in the sweet spot. That balance gives strong, stable cooling without icing the core, and it plays nicely with the LandCruiser’s DENSO variable-displacement compressor. Front A/C uses a block-style TX valve at the evaporator, many Aussie and Kiwi-delivered models with rear A/C have a second valve at the rear cooler assembly.

This isn’t a routine service item, but it does benefit from sensible A/C maintenance. If cooling fluctuates, if the low-side line ices up, if there’s a constant hiss at the firewall, or if vent temps are weak at idle but too cold on the highway, a sticking or restricted TX valve could be the culprit. Contamination from moisture or desiccant breakdown can gum up the valve, so any repair should include proper evacuation, filter-drier service, and clean oil handling.

Replacement is straight-forward for a licensed A/C tech: recover the refrigerant, remove the valve and O-rings, install a quality OEM-equivalent valve with new O-rings, torque to spec, evacuate, leak-test, and recharge with the correct refrigerant and oil. Most AU/NZ 2017 LandCruisers run R‑134a, but always check the under‑bonnet label. If the system’s been open or a compressor has failed, add these best practices:

• Replace the receiver/drier or desiccant element as specified in the Toyota manual.
• Flush lines and the condenser where recommended, never flush the compressor or TX valve.
• Vacuum for at least 30 minutes and pressure‑test with nitrogen before recharging.

Good habits help the TX valve live a long life: keep the cabin filter fresh, ensure the condenser is clean, and get an annual performance and leak check. For vehicles with rear A/C, remember there are two valves—diagnose both ends if rear cooling isn’t up to scratch.

Popular questions

Does a 2017 LandCruiser have one or two TX valves?
Most have one for the front system, and models fitted with rear air have a second TX valve at the rear evaporator. If rear cabin cooling is poor while the front is fine, the rear valve or rear circuit is a prime suspect.

When should the TX valve be replaced?
There’s no set interval—it’s replaced when faulty or contaminated. Signs include erratic vent temperatures, frosting on lines at the firewall, or poor low‑speed cooling. Any system opened for major work should get new O‑rings and a thorough evacuation, consider valve replacement if debris or moisture is suspected.

What does TX valve replacement typically cost?
Ballpark in AU/NZ: parts from roughly $120–$300, plus 1.5–3.0 hours’ labour for the front. Rear TX valve jobs can take 2.5–4.5 hours due to trim access. Add refrigerant, oil balancing, and leak testing. Actual pricing varies by workshop and spec.