Nissens 999847 A/C Expansion Valve

Nissens A/C Expansion Valve for Tacoma

The Nissens 999847 thermal expansion valve regulates refrigerant flow in the air conditioning system to help maintain stable evaporator performance. It is a block-style, aluminum valve for R134 refrigerant applications and is built to OE-matching pressure, tightness, opening, set-point, and internal finish standards.

Compatible with 2006-2023 Toyota Tacoma A/C systems, this Nissens expansion valve is a direct-fit service part for restoring proper refrigerant metering in the HVAC circuit. The 999847 part number is also referenced in cross applications under UAC EX10311C.

Key Features

• Block-style A/C expansion valve for Toyota Tacoma HVAC service
• Aluminum construction for corrosion resistance and thermal stability
• Configured for R134 refrigerant systems
• Includes O-rings and mounting hardware where applicable
• Built and tested to OE-matching performance standards
• Part number 999847 for easy identification

Detailed Description

Nissens thermal expansion valves are engineered to control refrigerant flow into the evaporator based on system demand. By regulating pressure and refrigerant delivery, the valve helps the A/C system maintain consistent cooling performance across changing operating conditions. This makes the Nissens 999847 a practical replacement for 2006-2023 Toyota Tacoma models that use a block-type expansion valve with R134 refrigerant.

Manufacturing validation focuses on pressure performance, sealing integrity, opening behavior, set-point accuracy, and internal surface finish. Those checks help ensure the valve matches OE expectations for fit and function in Tacoma HVAC repair work. If you are searching for a 2006-2023 Toyota Tacoma A/C expansion valve, Nissens 999847 is a direct service option.

This part cross-references UAC EX10311C for the same application.

What It Helps Fix

• Weak or inconsistent cabin cooling
• Incorrect refrigerant metering at the evaporator
• A/C performance issues caused by a sticking or worn expansion valve
• Pressure imbalance in the HVAC refrigerant circuit
• Service repairs on Toyota Tacoma air conditioning systems

Installation Notes and Tips

• Verify the vehicle uses a block-style expansion valve and R134 refrigerant before installation.
• Replace the O-rings during service and lubricate them with the correct refrigerant oil.
• Inspect the evaporator, lines, and compressor for contamination or debris before reassembly.
• Recover and recharge the system according to factory service procedures.
• Confirm proper cooling performance after installation and leak testing.

Quality Assurance

Nissens manufactures this expansion valve to strict OE-matching standards and validates pressure control, sealing, opening characteristics, set-point calibration, and internal finish for consistent HVAC service quality.