Parts for your 2007 Nissan X-trail-Tx valve

2007 Nissan X‑Trail TX Valve (Thermal Expansion Valve)

Technical sources confirm a TX valve is indeed fitted to the 2007 Nissan X‑Trail. The Nissan X‑Trail Service Manual (HA – Heater & Air Conditioner) specifies a thermostatic expansion valve at the evaporator inlet, and the Nissan FAST/EPC lists an “Expansion Valve (part code family 92200)” for 2007 X‑Trail models. Major A/C catalogues from OEM suppliers such as DENSO also list a matching expansion/TX valve for T30 (late) and early T31 vehicles built in 2007. So, the TX valve is relevant to this model year.

On the 2007 X‑Trail, the TX valve’s job is to meter the right amount of R134a into the evaporator so the core runs cold without icing up. It reacts to temperature and pressure (superheat) at the evaporator outlet, keeping vent temps steady in stop‑start traffic and protecting the compressor from liquid slugging. That’s why a healthy TX valve is key to crisp, reliable air‑con on sweltering Aussie or Kiwi summer days.

It’s not a routine service item, but it should be checked whenever the A/C system is opened or performance drops. Typical symptoms of a crook TX valve include slow cool‑down, vent temps that swing hot‑cold, frost on the evaporator line, or odd high/low gauge readings. Because it sits at the evaporator inlet behind the dash (with pipe unions accessible at the firewall under the bonnet), replacement is a tidy job for an ARCtick‑licensed tech in Australia or a certified refrigerant handler in New Zealand.

When replacing the TX valve on an X‑Trail, a good workshop will:

• Recover the refrigerant, then disconnect the A/C lines at the firewall and access the valve at the heater box.
• Fit new HNBR O‑rings with the correct PAG oil, and torque the fittings properly.
• Pressure‑test with nitrogen, vacuum, then recharge with the specified R134a charge and oil per the service manual.
• Replace the receiver‑drier or desiccant bag (many X‑Trails use a condenser‑integrated drier) whenever the system is opened.

If the compressor has failed or there’s contamination, the valve should be replaced rather than flushed. Keeping the cabin filter clean helps airflow across the evaporator, which makes the TX valve’s job easier and improves overall cooling. Expect around 1.5–3 hours including evacuate and re‑gas, depending on model and access. DIY venting is illegal—leave refrigerant handling to the pros to protect the environment and your air‑con gear.

Does a 2007 Nissan X‑Trail have a TX valve or an orifice tube?

It uses a thermostatic expansion (TX) valve mounted at the evaporator inlet. The parts catalogue and service manual both identify an expansion valve for 2007 models, not an orifice tube/accumulator setup.

Where is the TX valve located on a 2007 X‑Trail?

It’s at the evaporator inlet inside the HVAC case behind the dash. The A/C line unions are accessed at the firewall in the engine bay, interior access is typically behind the glovebox to reach the valve and sensor bulb.

What are common signs the TX valve needs attention?

Slow cool‑down, fluctuating vent temps, frosting on the evaporator inlet line, hissing or hunting noises, and abnormal pressure readings. If there’s compressor debris in the system, the valve can stick—replacement is recommended during major A/C repairs.