Four Seasons 74931 HVAC Heater Control Valve

Four Seasons 74931 Heater Valve Overview

The Four Seasons 74931 heater valve is a single solenoid electronic bypass valve built for precise coolant flow control in the HVAC system. It uses a thermoplastic and steel construction with an electric valve operation and three connectors for vehicle-specific integration.

Four Seasons Heater Valve products are backed by more than 50 years of mobile A/C experience, with engineering and testing focused on dependable operation in daily service.

Key Features

• Single solenoid electronic heater valve
• Bypass style for HVAC temperature control
• Electric valve operation
• Thermoplastic / steel construction
• 3 connectors with 2 terminal pins
• Opening dimensions: 0.79 in, 0.78 in, and 0.80 in
• Cross-reference: Dorman - HELP 74931

Detailed Description

This Four Seasons 74931 HVAC heater control valve regulates heater core coolant flow to support accurate cabin temperature control. It is a direct-fit style replacement for select Chrysler, BMW, and Mini applications, including 2017-2022 Chrysler Pacifica, 2020-2022 Chrysler Voyager, 2016-2018 BMW 330e, 2016-2018 BMW 330i, 2017-2018 BMW 330i GT xDrive, 2017-2018 BMW 330i xDrive, 2018-2019 BMW 530e, 2018-2019 BMW 530e xDrive, 2018-2019 BMW 530i, 2018-2019 BMW 530i xDrive, 2017-2019 BMW 740e xDrive, 2017-2019 BMW 740i, 2017-2019 BMW 740i xDrive, 2017 BMW 740Le xDrive, 2014-2017 BMW i8, and 2018-2019 Mini Cooper Countryman. The part number 74931 is also referenced across related OE and aftermarket listings for the same application.

Use this heater valve when servicing HVAC temperature control on vehicles that rely on an electronically controlled bypass valve. The part number 74931 appears in interchange listings tied to OE references such as 68237835AA and 64119147347.

What It Helps Address

• Inconsistent cabin heat output
• Heater core coolant flow control issues
• HVAC temperature changes that do not respond correctly
• Electronic heater valve failure codes or valve response problems
• Loss of proper bypass function in the heating circuit

Installation Notes

Verify connector count, terminal pin layout, and opening dimensions before installation. Confirm vehicle application by year, make, and model, especially on BMW, Chrysler Pacifica, Chrysler Voyager, and Mini Cooper Countryman HVAC systems. Inspect the electrical connector and coolant hoses for wear or contamination during replacement.

Quality Assurance

Four Seasons engineers and tests its HVAC components for dependable service life, drawing on more than 50 years of mobile A/C experience. The brand positions this heater valve line for repair work where accurate fit and consistent operation matter.