Nissens 999556 A/C Expansion Valve

Nissens A/C Expansion Valve for Mazda CX-7 and Mazda 6

The Nissens 999556 A/C expansion valve is built for precise refrigerant control in select Mazda HVAC systems. It is specified for R134A applications and includes O-rings for sealing at installation.

Key Features

• Direct-fit A/C expansion valve for select Mazda CX-7 and Mazda 6 applications
• Designed for R134A refrigerant systems
• Includes O-rings for sealing points where applicable
• Built to OE-matching standards for pressure performance, tightness, opening behavior, set-point accuracy, and internal finish
• Cross-reference part number: GJ6A61J14B
• Part number: 999556

Detailed Description

Nissens 999556 is a thermal expansion valve for the air conditioning system, used to regulate refrigerant flow across the evaporator. It is engineered for Mazda CX-7 and Mazda 6 models with R134A refrigerant, including 2007-2012 Mazda CX-7 and 2006-2007 Mazda 6 applications. The valve is manufactured and tested to control pressure performance, sealing integrity, opening characteristics, set-point calibration, and internal surface finish to OE-level specifications. The part number 999556 is a practical replacement choice when restoring proper A/C metering on these Mazda platforms.

Vehicle Fitment

• Fits 2007-2012 Mazda CX-7, N/A. Notes: Inlet 1: 34mm, Inlet 2: 25.6 mm, Outlet 1: 15.8 mm, Outlet 2: 15.8 mm
• Fits 2006-2007 Mazda 6, N/A. Notes: Inlet 1: 34mm, Inlet 2: 25.6 mm, Outlet 1: 15.8 mm, Outlet 2: 15.8 mm

Common A/C Issues This Part Addresses

• Irregular evaporator refrigerant metering
• Warm air from the vents when the A/C system is charged
• Erratic cooling performance during driving or idle
• Improper system pressure balance in the HVAC circuit
• Leak-related sealing concerns at the valve connection points

Installation Notes and Tips

Verify refrigerant type before installation; this valve is specified for R134A systems. Match the inlet and outlet dimensions to the original part before assembly, and replace the sealing O-rings during service. The part number 999556 is listed for Mazda CX-7 and Mazda 6 applications with the noted port sizes, so confirm the HVAC layout against the vehicle before installation.

Quality Assurance

Nissens manufactures this expansion valve under controlled testing and validation procedures to maintain pressure performance, tightness, opening behavior, set-point accuracy, and internal finish to OE-matching standards.