BMW M4 2021-present

BMW M4 2021-present HVAC Specifications

Detailed technical specifications and documentation for the HVAC system in the 2021-Present BMW M4. Includes system components, performance metrics, climate control features, and diagnostic procedures.

Updated Oct 24, 2023

Overview Specifications

Comprehensive description of the HVAC specifications for the 2021-Present BMW M4, including key features, measurements, and technical details. This section provides detailed insights into the heating, ventilation, and air conditioning system, ensuring optimal performance and comfort.

How to Use

Use the search bar to locate specific HVAC specifications by entering keywords such as 'blower motor', 'refrigerant capacity', or 'temperature control'.

Navigate through the HVAC documentation sections using the table of contents or by scrolling through the page. Each section is clearly labeled for easy access.

Key Specifications

Refrigerant Capacity

550 g

Heater Core Output

5.5 kW

Blower Motor Power

300 W

Cooling Capacity

7.2 kW

Airflow Capacity

650 CFM

Available Specifications

Climate Control System

This section covers the advanced climate control system of the BMW M4, including its dual-zone automatic temperature control and air distribution features.

Dual-Zone Automatic Climate Control

Independent temperature control for driver and front passenger
Temperature range: 60°F to 84°F (15.5°C to 29°C)
Automatic air recirculation with air quality sensor
Microfilter system with activated charcoal for pollutant filtration

Air Distribution System

Multi-level air vents for precise airflow direction
Airflow capacity: Up to 650 cubic feet per minute (CFM)
Automatic defrost and defog functions
Rear seat ventilation ducts for passenger comfort

Note: The air distribution system is optimized for rapid cabin temperature adjustment.

Heating and Cooling Components

Detailed information on the heating and cooling components, including the heater core, evaporator, and refrigerant system.

Heater Core Specifications

Heater core material: Aluminum
Heat output: 5.5 kW at full capacity
Coolant flow rate: 12 liters per minute (L/min)
Integrated temperature control valve

Refrigerant System

Refrigerant type: R1234yf
Refrigerant capacity: 550 grams (g)
Compressor type: Variable displacement
Cooling capacity: 7.2 kW at maximum load

Note: The refrigerant system is designed for high efficiency and environmental compliance.

HVAC Electrical Components

This section provides details on the electrical components of the HVAC system, including the blower motor, sensors, and control modules.

Blower Motor

Blower motor power: 300 watts (W)
Speed control: 12-speed electronically controlled
Airflow range: 150 to 650 CFM
Noise level: < 60 decibels (dB) at maximum speed

Sensors and Control Modules

Interior temperature sensor accuracy: ±0.5°C
Sunload sensor for solar compensation
HVAC control module with CAN bus integration
Automatic humidity control for defogging

Note: The HVAC control module ensures seamless integration with the vehicle's infotainment system.

Search Specifications

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Component Specifications

General Specifications

System Type: Automatic Dual-Zone Climate Control

Refrigerant Type: R1234yf

Refrigerant Capacity: 500 ± 20 g

Compressor Type: Variable Displacement

Blower Motor Power: 200 W

Airflow Capacity: 1200 m³/h

Temperature Control

Temperature Range: 16°C to 28°C

Temperature Resolution: 0.5°C

Sensor Accuracy: ±0.5°C

Auto Mode Response Time: 5-10 minutes

Air Distribution

Vent Modes

Face
Foot
Defrost
Combination

Airflow Direction Adjustment: 8-way adjustable

Rear Seat Ventilation: Yes

Rear Vent Airflow Capacity: 300 m³/h

Filtration System

Filter Type: Cabin Microfilter with Activated Carbon

Filter Part Number: 64 31 9 388 123

Filter Replacement interval: 15,000 miles or 12 months

Filter Efficiency: 99% for particles > 0.3 µm

Heating System

Heater Core Type: Aluminum

Heater Core Capacity: 6 kW

Water Valve Type: Electronically Controlled

Water Valve Part Number: 64 11 9 388 456

Max Heating Temperature: 60°C

Cooling System

Evaporator Type: Aluminum

Evaporator Capacity: 4.5 kW

Condenser Type: Parallel Flow

Condenser Part Number: 64 51 9 388 789

Max Cooling Capacity: 5.5 kW

Compressor Specifications

Compressor Part Number: 64 52 9 388 321

Compressor Displacement: 120 cc

Compressor Oil Type: PAG 46

Compressor Oil Capacity: 150 ± 10 ml

Compressor Max Rpm: 8000 rpm

Electrical Specifications

System Voltage: 12 V DC

Blower Motor Current: 16 A

Compressor Clutch Current: 4 A

Control Module Part Number: 64 11 9 388 654

Fuse Rating: 30 A

Diagnostic Specifications

Diagnostic interface: OBD-II

Fault Code Storage: Up to 50 codes

Self Diagnosis Capability: Yes

Diagnostic Tool Compatibility

BMW ISTA
Generic OBD-II Scanners

Maintenance Specifications

Refrigerant Recharge interval: 24 months or as needed

System Pressure Check interval: 12 months

Compressor Belt Tension: 500 ± 50 N

Lubrication Points

Compressor Shaft
Blower Motor Bearings

Lubrication interval: 30,000 miles

Service Information Service

Detailed service requirements and schedules for the HVAC system

15,000

Replace cabin air filter
Inspect refrigerant levels
Check compressor belt tension

Ensure all connections are secure and free of leaks

30,000

Recharge refrigerant
Lubricate compressor shaft and blower motor bearings
Inspect and clean evaporator and condenser coils

Use only BMW-approved refrigerant and lubricants

60,000

Replace compressor oil
Inspect and replace water valve if necessary
Perform full system diagnostic

Ensure all electrical connections are corrosion-free

Frequently Asked Questions

Find answers to common questions about torque specifications

What is the refrigerant type and capacity for the 2021-Present BMW M4 HVAC system?

The 2021-Present BMW M4 HVAC system uses R1234yf refrigerant, with a total system capacity of approximately 500-550 grams. This refrigerant is environmentally friendly and complies with EU regulations.

How does the automatic climate control system work in the BMW M4?

The BMW M4 features a 3-zone automatic climate control system with individual temperature settings for the driver, front passenger, and rear passengers. It uses sensors to monitor cabin temperature, humidity, and sunlight intensity, adjusting airflow and temperature automatically for optimal comfort.

What is the power consumption of the HVAC system in the BMW M4?

The HVAC system in the BMW M4 consumes approximately 1.5-2.5 kW under full load, depending on external conditions and system settings. The system is designed to balance performance and energy efficiency.

How often should the cabin air filter be replaced in the BMW M4?

The cabin air filter in the BMW M4 should be replaced every 15,000-20,000 miles or once a year, whichever comes first. This ensures optimal air quality and system performance.

Can the HVAC system be controlled via the BMW ConnectedDrive app?

Yes, the HVAC system in the BMW M4 can be controlled remotely using the BMW ConnectedDrive app. This allows users to pre-condition the cabin temperature before entering the vehicle.

Factory Service Resources

Access official service manuals, technical documents, and repair guides. These resources provide detailed procedures, specifications, and diagrams directly from the manufacturer.

BMW M4 HVAC System Overview

Coming Soon

Detailed technical overview of the HVAC system, including components, specifications, and functionality.

HVAC Maintenance Guide

Coming Soon

Step-by-step guide for maintaining the HVAC system, including filter replacement and system diagnostics.

BMW ConnectedDrive HVAC Control

Coming Soon

Instructions for using the BMW ConnectedDrive app to control the HVAC system remotely.

Refrigerant Handling and Safety

Coming Soon

Safety guidelines and procedures for handling R1234yf refrigerant in the BMW M4 HVAC system.

About the Author

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