Four Seasons 74893 HVAC Heater Control Valve

Four Seasons 74893 Heater Valve Overview

The Four Seasons Heater Valve 74893 is an OE replacement HVAC heater control valve for BMW applications that use a 3-port, electric, non-bypass design. Built with thermoplastic and steel construction, it uses female terminals and 0.750 in. openings for a direct-fit style repair on select BMW 525i, 735i, 750iL, and related models.

Four Seasons Heater Valve line components are built for temperature-control service in the HVAC system, helping restore proper coolant flow through the heater circuit. This part number, 74893, is listed for multiple BMW chassis and matches the original equipment style for the applications shown below.

Key Features

• OE replacement HVAC heater control valve
• Multiple solenoid electronic heater valve design
• Electric valve operation with non-bypass style
• 3 hose connectors and 3 terminals
• Female terminal connection
• 0.750 in. end openings
• Thermoplastic / steel construction
• Direct replacement for select BMW heater valve applications

Vehicle Fitment

• Fits 1993-1999 BMW 850Ci, Heater Valve
• Fits 1994-1997 BMW 840Ci, Heater Valve
• Fits 1989-1995 BMW 525i, Heater Valve
• Fits 1994-1995 BMW 530i, Heater Valve
• Fits 1994-1995 BMW 540i, Heater Valve
• Fits 1994-1995 BMW 850CSi, Heater Valve
• Fits 1993-1994 BMW 740i, Heater Valve
• Fits 1993-1994 BMW 740iL, Heater Valve
• Fits 1988-1994 BMW 750iL, Heater Valve
• Fits 1993 BMW 525iT, Heater Valve
• Fits 1987-1993 BMW 535i, Heater Valve
• Fits 1991-1993 BMW M5, Heater Valve
• Fits 1985-1992 BMW 735i, Heater Valve
• Fits 1988-1992 BMW 735iL, Heater Valve
• Fits 1991-1992 BMW 850i, Heater Valve
• Fits 1988 BMW 535is, Heater Valve

What This Part Helps Address

• Inconsistent cabin heat on BMW HVAC systems
• Heater output that stays too hot or too cold
• Coolant flow control issues in the heater circuit
• Electrical heater valve failure in temperature control operation
• Replacement needs for worn OE-style heater valves

Installation Notes

Verify connector style, port count, and 0.750 in. fitting size before installation. Mounting hardware is not included. This part cross-references BMW applications such as 64111382299 and 64111390170 for the same heater valve use case. Confirm the vehicle’s HVAC layout and replace any damaged hoses or terminals during service for a clean repair.

Quality Assurance

Four Seasons 74893 is an OE replacement heater valve built to match the original application requirements for select BMW 850Ci, 525i, 735i, and related models. The part number 74893 is cataloged for direct application matching within the listed BMW heater valve fitments.