Parts for your 2019 Volkswagen Amarok-Tx valve

2019 Volkswagen Amarok TX Valve — Purpose, Location, and Servicing Tips

Based on Volkswagen’s official workshop information (ElsaPro/erWin, HVAC section for Amarok 2H), the factory parts catalogue (ETKA, Group 8: Air conditioning, evaporator/expansion valve illustration), and major HVAC component catalogues used in AU/NZ trade (DENSO and Behr-Hella listings for Amarok 2011–2020), the 2019 Volkswagen Amarok is fitted with a thermostatic expansion valve (TX valve, TXV). It’s a block-style metering device at the evaporator connections, not an orifice tube system.

The TX valve on the 2019 Amarok meters refrigerant flow into the evaporator so the air-con can cool consistently in the Aussie and Kiwi climates without drama. It reacts to evaporator outlet temperature/pressure and trims flow so the evaporator neither floods nor starves. That precise control helps deliver steady vent temps at idle, towing, or rolling up the motorway. On the Amarok, the TXV is a compact H-block mounted at the evaporator pipes where they pass through the firewall. Most AU/NZ 2019 Amaroks run R134a, always check the under‑bonnet label for the correct refrigerant and oil type.

Owners and fleet managers will usually notice TXV issues as weak cooling at idle, frosty or sweating lines at the firewall, temp swings, hissing at the dash, or a high/low side pressure mismatch on gauges. Because the valve is a precision bit of kit, contamination (moisture, metal fines) from an ageing compressor or a system opened to atmosphere can make it stick.

Good service practice for an Amarok air‑con when the TXV is disturbed includes:

• Recover the refrigerant with approved gear, then replace the TXV and all related O‑rings, lightly lubricated with the correct PAG oil.
• If the system has been open or a compressor has failed, fit a new receiver‑drier/desiccant element and flush as specified in the workshop manual.
• Vacuum for the time recommended in the VW procedure, confirm it holds vacuum, then charge by weight to the label spec.
• Run performance checks: vent temps, fan operation, pressure readings, and no unusual line frost patterns.

Replacement access on the Amarok is typically at the firewall where the A/C lines meet the evaporator block. Fasteners are modest torque—use manufacturer specs to avoid warping the valve or nicking the sealing faces. Keeping the cabin filter fresh and the condenser clean helps the TXV do its job, reducing cycling and keeping the ute cool on scorching summer runs or long gravel hauls.

• Where is the TX valve on a 2019 Volkswagen Amarok?
  On the Amarok (2H), the TXV sits at the evaporator connections on the firewall, where the two A/C hard lines pass into the cabin. It’s a small H‑block with two bolts and O‑ringed line fittings. Access is typically from the engine bay.
• What are common signs the Amarok’s TX valve is failing?
  Tell‑tales include weak or fluctuating cooling, noticeable hissing at the dash, icy or sweating lines at the firewall, and pressure readings that show a starved or flooded evaporator. After compressor issues or contamination, a sticky TXV is common.
• Does the 2019 Amarok use an orifice tube instead of a TX valve?
  No. Technical documentation and parts listings for the 2019 Amarok specify a thermostatic expansion valve at the evaporator. It’s not an orifice‑tube system.