Nissens 999358 A/C Expansion Valve

Nissens A/C Expansion Valve for BMW HVAC Service

Nissens part 999358 is a block-style A/C expansion valve built for R134A systems and made from aluminum for BMW climate control service. It is a direct-fit HVAC flow restrictor for a wide range of BMW 3 Series, 5 Series, 7 Series, 8 Series, Z3, and M models from 1987-2001.

Key Features

• Block-style A/C expansion valve for automotive HVAC systems
• Aluminum construction for corrosion resistance and thermal stability
• Configured for R134A refrigerant
• O-rings included; mounting hardware not included
• Liquid and suction port thread diameters listed for accurate service matching
• Fits BMW applications including 740i, 740iL, 750iL, Z3, 318ti, M3, and more

Product Details

Nissens 999358 is an A/C expansion valve used to regulate refrigerant flow into the evaporator, helping the HVAC system maintain proper cooling performance. This block-type valve is specified for R134A refrigerant systems and uses aluminum construction with the listed inlet and outlet thread dimensions for liquid and suction connections. It is a practical replacement for BMW A/C service on models such as the BMW 740i, BMW 750iL, and BMW Z3, as well as multiple 3 Series, 5 Series, 7 Series, 8 Series, and M applications. This part cross-references Febi-Bilstein 38630 for the same application.

Vehicle Fitment

• Fits 1997-2001 BMW 740i, N/A
• Fits 1993-1995 BMW 740i, N/A
• Fits 1993-2001 BMW 740iL, N/A
• Fits 1988-2001 BMW 750iL, N/A
• Fits 1996-2000 BMW Z3, N/A
• Fits 1997-1999 BMW 318ti, N/A
• Fits 1999 BMW 323i, N/A, Convertible
• Fits 1998-1999 BMW 323is, N/A
• Fits 1999 BMW 328i, N/A, Convertible
• Fits 1996-1999 BMW 328is, N/A
• Fits 1995-1999 BMW M3, N/A
• Fits 1993-1998 BMW 318i, N/A
• Fits 1998 BMW 323i, N/A
• Fits 1996-1998 BMW 328i, N/A
• Fits 1992-1997 BMW 318is, N/A
• Fits 1994-1997 BMW 840Ci, N/A
• Fits 1993-1997 BMW 850Ci, N/A
• Fits 1992-1995 BMW 325i, N/A
• Fits 1992-1995 BMW 325is, N/A
• Fits 1989-1995 BMW 525i, N/A
• Fits 1994-1995 BMW 530i, N/A
• Fits 1994-1995 BMW 540i, N/A
• Fits 1994-1995 BMW 850CSi, N/A
• Fits 1989-1993 BMW 535i, N/A
• Fits 1991-1993 BMW M5, N/A
• Fits 1992 BMW 318i, N/A, Sedan
• Fits 1987-1992 BMW 735i, N/A
• Fits 1988-1992 BMW 735iL, N/A
• Fits 1991-1992 BMW 850i, N/A

Common Repair Uses

• Restores refrigerant metering when the A/C system is not cooling correctly
• Addresses uneven evaporator performance in BMW HVAC systems
• Helps correct refrigerant flow issues caused by a worn or restricted expansion valve
• Supports repair of BMW A/C systems that use R134A refrigerant
• Provides a replacement for leaking or damaged block-style expansion valves

Installation Notes and Tips

Verify refrigerant type, port dimensions, and vehicle application before installation. Replace the included O-rings during service and inspect the surrounding A/C lines, evaporator connections, and seals for wear or contamination. Proper evacuation, leak testing, and recharge procedures should be followed after installation to restore system performance.

Quality Assurance

Nissens develops and manufactures thermal management components to consistent quality standards across its aftermarket range. Part number 999358 is built as a service replacement for BMW HVAC applications and follows the brand’s established engineering approach for A/C system components.