Maserati Ghibli Levante Quattroporte A/C Expansion Valve TXV Kit 673003704

Precision A/C Expansion Valve / TXV Kit for Maserati – 673003704

Keep the climate-control system operating efficiently with a replacement thermostatic expansion valve corresponding with Maserati part number 673003704. The TXV regulates refrigerant flow into the evaporator, controlling pressure and refrigerant volume so the air-conditioning system can absorb cabin heat effectively and maintain stable cooling performance.

Materials & Workmanship

The valve body is precision-machined from lightweight metal for accurate refrigerant passage geometry, corrosion resistance and efficient thermal response. Internally controlled flow passages meter refrigerant through the A/C circuit while the compact block-style construction provides a rigid sealing surface for the connected refrigerant lines.

What It Does

The expansion valve reduces refrigerant pressure before it enters the evaporator and meters the correct amount of refrigerant according to system demand. A correctly functioning TXV helps the evaporator operate at the proper temperature, supports consistent vent cooling and prevents inefficient refrigerant flow through the circuit.

Fitment & Reference

Part number: 673003704. This TXV kit is used on selected Maserati Ghibli, Levante and Quattroporte M156 applications and replaces earlier reference 673000087 in relevant catalogues. Always match the vehicle part number and A/C line configuration before installation.

How to Replace

1. Have the refrigerant professionally recovered using approved A/C service equipment. Refrigerant must not be vented to the atmosphere.
2. Disconnect battery power where required and access the expansion-valve location at the evaporator / A/C line connection.
3. Disconnect the refrigerant lines and remove the existing TXV fasteners.
4. Remove the old valve and seals, clean the sealing surfaces and install the new valve with the correct compatible seals.
5. Reconnect the refrigerant lines and tighten fittings to the vehicle service specification.
6. Evacuate the system under vacuum, leak-test it and recharge with the specified refrigerant quantity.
7. Run the A/C system and verify vent temperature, pressures and compressor operation.

Why Replace It?

A failing expansion valve can cause weak cooling, inconsistent evaporator temperature, abnormal system pressures or frost-related performance issues. Replacing the TXV restores accurate refrigerant metering and helps the climate-control system work as designed.

FAQ

What is a TXV?
A thermostatic expansion valve meters high-pressure refrigerant into the evaporator at the correct rate.

Which Maserati models use 673003704?
The part number appears in applications for Maserati Ghibli, Levante and Quattroporte M156.

Does this replace 673000087?
673003704 is listed as a superseding TXV kit for 673000087 in relevant Maserati parts catalogues.

Can the valve be changed without recovering refrigerant?
No. The A/C circuit must be professionally recovered, evacuated and recharged using proper service equipment.

What benefit does a new valve provide?
It restores controlled refrigerant flow through the evaporator, supporting stable cooling and correct A/C system pressures.