Parts for your 2007 Nissan Dualis-Tx valve

TX-valve on a 2007 Nissan Dualis (J10): What it does and how to look after it

Yes, the 2007 Nissan Dualis (J10, also known as Qashqai) uses a TX-valve (thermal expansion valve). This is confirmed by multiple technical sources: the Nissan Electronic Service Manual (J10) in the Heater & Air Conditioning (HA) section illustrates a block-type expansion valve at the evaporator, the Nissan FAST parts catalogue lists a “Valve Assy – Expansion” for J10 models (commonly referenced as 92200‑JD00A and supersessions), and major A/C component catalogues from OEM suppliers (such as DENSO) specify a dedicated expansion valve for the Dualis/Qashqai J10 platform.

On the Dualis, the TX-valve is the metering brain of the air-con. It regulates the flow of R134a into the evaporator, reacting to temperature and pressure so the evaporator runs at the sweet spot. That delivers cold air without letting liquid refrigerant slug the compressor. When a TX-valve gets sticky, blocked or misreads superheat, the cabin cools poorly, pressures go out of whack, and you might see frost at the valve or hear odd hissing while the system struggles.

The J10 uses a compact block-type TX-valve mounted directly on the evaporator at the HVAC case. Access varies a bit by engine and RHD/LHD layout, but the valve sits where the two A/C pipes meet the evaporator at the bulkhead. It’s not a routine “service item”, yet it’s good practice during A/C servicing to inspect for oil staining at the fittings, check for temperature drop across the valve, and verify system pressures and vent temps. If the system has been contaminated (compressor failure, moisture ingress) or left open, that valve can suffer—best to address it before it causes compressor grief.

When replacing the TX-valve on a Dualis:

• Recover the refrigerant properly, disconnect the battery, and gain access at the bulkhead/HVAC case.
• Crack the line fittings, remove the old valve, and always fit new O-rings lubricated with the correct oil specified for the J10 compressor (Nissan ND-Oil equivalent).
• Tighten to the torque values in the Nissan ESM. Don’t overdo it—those alloy blocks and seats are easy to mark.
• Replace the receiver–drier whenever the system’s been opened. On many J10s it’s integrated with the condenser, so budget for a drier cartridge or condenser swap if required.
• Pressure test with dry nitrogen, evacuate thoroughly, and recharge with the exact R134a mass listed on the vehicle label. Then verify vent temps and pressure stability.

A well-functioning TX-valve keeps the Dualis cool on scorching summer runs, protects the compressor, and makes the whole system more efficient. If the air’s warm at idle, the lines frost oddly, or the gauges don’t behave, the TX-valve is high on the shortlist to check.

Popular questions about 2007 Nissan Dualis TX-valve

Where is the TX-valve on a 2007 Nissan Dualis?
It’s a block-type valve mounted directly to the evaporator on the HVAC case, where the two A/C pipes pass through the bulkhead. Depending on engine layout and tools, access may be from the engine bay near the firewall, some techs remove the wiper cowl for more room.

What are the common signs of a faulty TX-valve on a Dualis?
Poor cooling, big temperature differences across the valve, frost or sweating at the fittings, fluctuating high/low side pressures, and intermittent cold air are typical. After a compressor failure, debris can also jam the valve, so performance can nose-dive quickly.

Do I need to replace the drier when changing the TX-valve?
Yes, best practice is to replace the receiver–drier any time the system is opened. On many Dualis J10 models the drier is built into the condenser, so plan for a drier cartridge or condenser replacement to keep moisture out and safeguard the new valve and compressor.