Nissens 999392 A/C Expansion Valve - Front

Nissens A/C Expansion Valve for Metris

The Nissens 999392 A/C expansion valve is a block-style HVAC flow restrictor built for R134A systems. It is a direct-fit service part for the front A/C circuit on select Mercedes-Benz Metris models, with aluminum construction and included O-rings for a cleaner replacement process.

Key Features

• Block-style A/C expansion valve for HVAC refrigerant control
• Aluminum construction for use in automotive A/C service
• Designed for R134A refrigerant systems
• Includes mounting hardware and O-rings
• Direct application for Mercedes-Benz Metris front A/C service
• Part number 999392 for ordering and cross-reference

Product Details

Nissens 999392 is an A/C expansion valve used to regulate refrigerant flow into the evaporator on the front HVAC system. It is specified for 2016-2021 Mercedes-Benz Metris, front, and is built as a block-type valve with aluminum construction. The included O-rings and mounting hardware support a complete service replacement, while the R134A refrigerant specification matches the intended system design. This part cross-references Monroe Shocks & Struts (e.g., 0008352500, A0008352500) for the same application.

What It Helps Fix

• Weak or inconsistent cabin cooling
• Incorrect refrigerant metering at the evaporator
• Front HVAC performance issues on Mercedes-Benz Metris models
• Leaks at the expansion valve connection points
• Service failures caused by worn internal valve components

Installation Notes and Tips

Fits 2016-2021 Mercedes-Benz Metris, front. Replace the O-rings during installation and verify the system is clean, evacuated, and recharged with the correct R134A refrigerant specification. Confirm the valve orientation and connection points before assembly to avoid leaks or restricted flow. Part number 999392 should be matched to the vehicle’s front HVAC configuration before service.

Quality Assurance

Nissens develops and manufactures thermal management components to controlled quality standards for the aftermarket. The 999392 expansion valve reflects that product focus with application-specific construction and OE-style service fitment for Mercedes-Benz Metris front A/C repair.