Four Seasons 74894 HVAC Heater Control Valve

BMW Heater Valve Replacement

Restore proper cabin temperature control with this Four Seasons Heater Valve, part number 74894. This OE replacement electric heater control valve is built for BMW heating systems that use a multiple-solenoid design and 0.75-inch hose connections.

Compatible with select BMW 3 Series and M Series applications, including BMW 318i, 318is, 318ti, 323i, 323is, 325i, 325is, 328i, 328is, M3, and M5 models. Four Seasons 74894 is a direct-fit HVAC heater control valve for vehicles that require a non-bypass, electronically operated valve.

Key Features

• Four Seasons Heater Valve line for HVAC temperature control service
• Electric valve operation with multiple solenoid electronic design
• Non-bypass style for direct heater circuit control
• OE replacement construction for factory-style fitment
• Thermoplastic and steel materials for HVAC use
• Three hose connectors, three ports, and three female terminals
• 0.75-inch openings on both ends

Product Details

This heater control valve regulates coolant flow through the heater core to help maintain consistent cabin heat. The Four Seasons 74894 is specified as a non-bypass electric heater valve with three connectors and a 3-port layout, matching BMW HVAC systems that rely on electronic coolant control. It cross-references Gates EHV101 for the same application.

Use this part when servicing BMW heater valve failures on 1992-1999 BMW 318i, 318is, 318ti, 323i, 323is, 325i, 325is, 328i, 328is, M3, and 1999 BMW M5 applications. The part number 74894 is also referenced under OE-style numbers including 64118375792.

Common Issues This Part May Address

• Loss of cabin heat
• Heat stuck on or stuck off
• Inconsistent temperature output from the HVAC system
• Coolant flow control problems at the heater core
• Electrical heater valve malfunction

Installation Notes

Verify hose routing, connector style, and valve orientation before installation. This valve uses three female terminals and does not include mounting hardware. Confirm the vehicle uses a non-bypass, electric heater valve with 0.75-inch hose connections before replacing the original unit.

Quality Assurance

Four Seasons supplies OE replacement HVAC components for temperature control service. Part number 74894 is built to match the specified BMW heater valve application and support factory-style heater system operation.