Nissens 9991041 A/C Expansion Valve

Overview

This Nissens A/C expansion valve is a block-style HVAC flow restrictor built for precise refrigerant control in Subaru applications. It is identified by part number 9991041 and uses aluminum construction with R134 refrigerant compatibility.

Compatible With 2015-2021 Subaru WRX, WRX STI, Forester, Crosstrek, and Impreza applications, this valve is developed to OE-matching standards for pressure performance, tightness, opening behavior, set-point accuracy, and internal finish.

Key Features

• Block-style A/C expansion valve for controlled refrigerant metering.
• Aluminum construction for HVAC system integration.
• R134 refrigerant type support.
• Includes O-rings and mounting bolts when applicable.
• Built and validated to OE-matching performance standards.
• Part number 9991041 for accurate ordering and service lookup.

Detailed Description

Nissens 9991041 is an A/C expansion valve designed for Subaru HVAC systems that require a block-type flow restrictor. It regulates refrigerant flow through the evaporator circuit, helping maintain stable cooling performance and proper system balance. The valve is manufactured with attention to pressure control, sealing integrity, opening characteristics, and internal surface finish, all aligned with OE-level specifications.

This part cross-references UAC EX10623C for the same application. Use 9991041 when servicing Subaru WRX, WRX STI, Forester, Crosstrek, or Impreza models listed in the fitment data.

What It Helps Address

• Inconsistent cabin cooling output.
• Restricted or uneven refrigerant metering.
• Loss of A/C system sealing at the valve interface.
• Improper evaporator feed control.
• Service replacement for a worn expansion valve.

Installation Notes and Tips

Verify refrigerant type before installation; this valve is specified for R134 systems. Replace the O-rings during service and confirm all sealing surfaces are clean and undamaged. Follow the vehicle service procedure for evacuation, leak checking, and recharge after installation.

Quality Assurance

Nissens manufactures this expansion valve to strict OE-matching standards and subjects it to testing for pressure performance, tightness, opening behavior, set-point accuracy, and internal finish. Part number 9991041 is supported by that validation process for consistent HVAC service replacement.