Parts for your 2013 Subaru Xv-Tx valve

2013 Subaru XV TX-valve: what it does and how to look after it

Yes, the 2013 Subaru XV runs a thermal expansion valve (TX-valve) in its air-con system. This isn’t guesswork—factory technical sources back it up. The Subaru factory service manual for the GP/GG Impreza/XV platform, DENSO’s A/C component catalogue, and OEM Subaru parts catalogues all list a block-type A/C expansion (TX) valve fitted at the evaporator inlet on the 2013 XV. It’s the bit that meters refrigerant into the evaporator to keep cabin temps steady and cool.

The TX-valve’s job is to regulate how much liquid refrigerant enters the evaporator based on the outlet temperature/pressure there. Do it right and you get crisp, consistent cooling without the system hunting or icing up. On the XV, it’s paired with an R134a system and a DENSO compressor, so correct metering is crucial to avoid erratic vent temps or compressor strain.

There’s no routine “service” item for a TX-valve, but it should be assessed any time the A/C system is opened, the compressor is replaced, or performance drops off. Because the XV’s valve is mounted at the evaporator in the HVAC box (passenger side behind the glove box area), access is a bit fiddly and best left to an A/C tech.

• Common symptoms of a tired or sticking TX-valve: weak cooling at idle but colder on the move, evaporator frosting, rapid temperature swings at the vents, or odd high/low-side gauge readings.
• Best practice with replacement: recover refrigerant, replace the receiver–drier/desiccant, install new OE-quality O-rings, add the correct PAG oil amount for component loss, evacuate, leak-test, and recharge by weight with R134a.
• Legal note: In Australia and New Zealand, refrigerant handling must be carried out by a licensed A/C technician (ARCtick in AU). DIY venting is a no-go.

If the XV’s air-con hasn’t been as chilly as it used to be, a proper diagnosis is worth it before throwing parts at it—contamination, moisture, a weak compressor, or airflow issues can mimic a crook TX-valve. But when the valve is the culprit, fitting a quality replacement and doing the recharge by the book usually brings the system back to factory-cool, ready for summer road trips.

Popular questions

Where is the TX-valve on a 2013 Subaru XV?

It’s a block-style valve mounted at the evaporator inlet inside the HVAC unit on the passenger side. Access typically involves removing the glove box and trim, then working at the evaporator connections. It’s tight, but a trained A/C tech does these all the time.

How much does TX-valve replacement usually cost?

Costs vary with parts quality and labour time, but as a ballpark, expect a few hundred dollars for labour plus the valve, O-rings, receiver–drier/desiccant, oil top-up, and an R134a recharge. A shop will quote more accurately after pressure testing and confirming the fault.

Can a TX-valve be cleaned instead of replaced?

If it’s sticking due to debris or moisture, cleaning is rarely reliable. Once contamination’s present, replacement of the valve and drier, plus a proper vacuum and recharge, is the dependable fix—and it protects the compressor too.