Four Seasons 38686 A/C Expansion Valve - Front

Reliable A/C Expansion Valve for BMW Models

The Four Seasons Expansion Valve 38686 is engineered to regulate refrigerant flow in your vehicle's air conditioning system. Designed specifically for select BMW models, this aluminum block-type valve ensures precise temperature control and efficient A/C performance.

• Constructed from durable aluminum material for corrosion resistance
• Compatible with R134a refrigerant systems
• Block type design with two mounting holes for secure installation
• Female suction and liquid inlet/outlet fittings with specific thread diameters
• Includes green o-rings for proper sealing and leak prevention
• Meets or exceeds OEM specifications for reliable fit and function

Four Seasons Expansion Valve Product Line Overview

The Four Seasons Expansion Valve line focuses on delivering precise refrigerant flow control components tailored for various vehicle HVAC systems. The 38686 part number belongs to this line, offering a block-type valve designed to maintain optimal air conditioning efficiency in BMW vehicles. This product line emphasizes OEM compatibility and durable materials to support long-term system performance.

Detailed Product Description and Specifications

This A/C expansion valve is crafted from aluminum, providing strength and resistance to corrosion. It is designed for use with R134a refrigerant, common in modern automotive air conditioning systems. The block-type valve features two mounting holes for secure attachment. Both suction and liquid inlet/outlet fittings are female, with thread diameters of No. 10 and No. 12 for suction, and No. 6 and No. 8 for liquid lines, respectively. The fittings use insert o-ring types with included green o-rings (part numbers 24612 and 24606) to ensure a tight seal and prevent refrigerant leaks. The liquid inlet size measures 0.41 inches (10.5 mm), and the liquid outlet size is 0.54 inches (13.6 mm). This valve is designed to meet or exceed OEM standards, ensuring compatibility and reliable operation in BMW 525i, 528i, 530i, 540i, M5, X5, and Z8 models.

Common Applications and Issues Addressed

• Regulates refrigerant flow to maintain consistent cabin temperature
• Prevents compressor damage caused by improper refrigerant pressure
• Resolves A/C system inefficiencies such as fluctuating cooling performance
• Eliminates refrigerant leaks due to worn or damaged expansion valves
• Supports proper defrosting and prevents evaporator freezing

Installation Notes and Tips

• Ensure compatibility with BMW 525i, 528i, 530i, 540i, M5, X5, and Z8 models before installation
• Use proper tools to avoid damaging the aluminum valve body or fittings
• Replace green o-rings during installation to maintain a secure seal
• Follow manufacturer torque specifications for mounting bolts
• Check the A/C system for leaks and proper refrigerant charge after installation

Quality Assurance and Warranty

The Four Seasons Expansion Valve 38686 is manufactured to meet or exceed OEM quality standards, ensuring dependable performance in your BMW's air conditioning system. This part undergoes rigorous testing for material integrity and fitment accuracy. Warranty coverage details should be confirmed with the product provider or manufacturer.