Nissens 999929 A/C Expansion Valve

Overview

The Nissens 999929 is a block-style A/C expansion valve for R134 refrigerant systems. It is built to OE matching standards for pressure performance, tightness, opening behavior, set-point control, and internal finish.

Compatible With Lexus GS, IS, and RC applications, plus select Toyota RAV4 models, this valve is a fitment-based replacement for vehicles using the specified block configuration. The Nissens 999929 is also supplied with O-rings and mounting bolts whenever applicable.

Key Features

• Block-style A/C expansion valve for R134 refrigerant systems
• Aluminum construction for HVAC service applications
• Manufactured to precise OE matching standards
• Validated for pressure performance, tightness, and opening control
• O-rings included; mounting bolts supplied whenever applicable

Detailed Description

Nissens 999929 is an A/C expansion valve engineered for vehicles that use a block-type thermal expansion valve in the HVAC system. It regulates refrigerant flow through the evaporator circuit, helping maintain proper system operation under the specified R134 refrigerant setup. This part number is used across Lexus GS, IS, and RC platforms, as well as select Toyota RAV4 applications, making fitment verification important before installation.

Nissens manufactures this valve with aluminum construction and subjects it to testing for pressure performance, sealing integrity, opening characteristics, set-point accuracy, and internal surface finish. This approach supports consistent operation in systems that require OE-level dimensional and functional matching. Part number 999929 is a direct reference for ordering and service lookup, and it cross-references Global Parts Distributors LLC 3411835 and 3411966 for the same application.

What It Is Used For

• Restoring refrigerant metering when the original valve is restricted or worn
• Addressing uneven evaporator performance caused by flow control issues
• Correcting A/C cooling problems related to improper pressure regulation
• Replacing a leaking valve that affects system tightness
• Servicing an OE-style block expansion valve in R134 systems

Installation Notes

Verify the vehicle’s refrigerant type, valve style, and application details before installation. Confirm the block configuration matches the original part and inspect sealing surfaces carefully during service. Replace the O-rings during installation and follow standard A/C evacuation and recharge procedures after the system is opened.

Quality Assurance

Nissens tests these expansion valves for pressure performance, tightness, opening behavior, set-point setting, and internal finish to OE matching standards. Part number 999929 is built under controlled manufacturing standards for consistent HVAC service replacement.