BMW 640i 2018-present

BMW 640i 2018-present HVAC Specifications

Explore the comprehensive technical specifications for the HVAC system in the 2018-Present BMW 640I, including detailed maintenance and troubleshooting guidelines.

Updated Oct 14, 2023

Overview Specifications

Comprehensive description of the HVAC specifications for the 2018-Present BMW 640I, including key features, measurements, and technical details.

How to Use

Use the search function to locate specific HVAC specifications by entering keywords such as 'cooling capacity', 'blower motor', or 'refrigerant type'.

Navigate through the HVAC documentation sections using the table of contents or by scrolling through the document. Each section is labeled with a clear title and subsection headers.

Key Specifications

Cooling Capacity

6.5 kW (22,200 BTU/h)

Heating Capacity

5.8 kW (19,800 BTU/h)

Maximum Airflow Rate

450 m³/h

HEPA Filter Efficiency

99.97% at 0.3 microns

System Voltage

12V DC

Available Specifications

HVAC System Overview

This section provides an overview of the HVAC system, including its components, functionality, and integration with the vehicle's electronics.

System Components

Dual-zone automatic climate control system
Electronically controlled blower motor
High-efficiency particulate air (HEPA) filter
Refrigerant type: R1234yf
System voltage: 12V DC

System Integration

Integrated with iDrive infotainment system
Automatic temperature control with sun sensor
Air quality sensor for automatic recirculation
Heated and ventilated front seats integration
Rear-seat climate control option

Note: The HVAC system is designed to work seamlessly with the vehicle's electronics for optimal performance and user convenience.

Cooling and Heating Specifications

This section details the cooling and heating capabilities of the HVAC system, including performance metrics and technical specifications.

Cooling Capacity

Cooling capacity: 6.5 kW (22,200 BTU/h)
Evaporator temperature range: 2°C to 10°C
Compressor type: Variable displacement
Refrigerant flow rate: 120 g/s
Cooling system pressure: 15-20 bar

Heating Capacity

Heating capacity: 5.8 kW (19,800 BTU/h)
Heater core temperature range: 80°C to 95°C
Electric auxiliary heater: 1.5 kW
Heat exchanger efficiency: 92%
Heating system pressure: 1.5-2.5 bar

Note: The electric auxiliary heater provides additional heating power in cold weather conditions.

Air Distribution and Filtration

This section covers the air distribution and filtration system, including airflow rates, filter specifications, and air quality management.

Airflow Specifications

Maximum airflow rate: 450 m³/h
Airflow distribution: 4-zone control
Blower motor speed range: 0 to 12,000 RPM
Air duct diameter: 80 mm
Airflow direction: Adjustable vents with 360° rotation

Filtration System

HEPA filter efficiency: 99.97% at 0.3 microns
Activated carbon filter for odor removal
Filter replacement interval: 15,000 miles or 12 months
Filter dimensions: 200 mm x 150 mm x 25 mm
Air quality sensor sensitivity: 0.1 ppm

Note: The HEPA filter is highly effective in removing allergens and pollutants from the cabin air.

Control and User Interface

This section explains the control mechanisms and user interface of the HVAC system, including display options and control settings.

Control Interface

Touchscreen control via iDrive system
Physical control knobs for temperature and fan speed
Voice command compatibility
Mobile app integration for remote control
Automatic mode with adaptive learning

Display and Feedback

10.25-inch central display for HVAC settings
Real-time temperature and humidity display
Visual feedback for air distribution
Warning indicators for filter replacement
Ambient lighting integration for mode indication

Note: The system provides intuitive feedback to ensure user-friendly operation.

Search Specifications

Search by specification name, value, or description

Component Specifications

General Specifications

System Type: Automatic 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 32°C

Temperature Resolution: 0.5°C

Sensor Accuracy: ±0.5°C

Dual Zone Control: true

Rear Seat Control: true

Air Distribution

Vent Modes

Face
Foot
Defrost
Auto

Vent Material: ABS Plastic

Vent Actuator Type: Stepper Motor

Vent Actuator Torque: 0.5 Nm

Vent Actuator Response Time: 0.2 s

Filtration System

Filter Type: Cabin Microfilter

Filter Part Number: 64 31 9 362 123

Filter Efficiency: 95% at 0.3 µm

Filter Replacement interval: 15,000 miles or 12 months

Activated Charcoal Layer: true

Heating System

Heater Core Material: Aluminum

Heater Core Capacity: 5.5 kW

Coolant Flow Rate: 10 L/min

Auxiliary Heater: true

Auxiliary Heater Power: 1.5 kW

Cooling System

Evaporator Material: Aluminum

Evaporator Capacity: 3.5 kW

Condenser Material: Aluminum

Condenser Capacity: 4.2 kW

Expansion Valve Type: Thermostatic

Compressor Specifications

Compressor Part Number: 64 51 9 362 456

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 9 362 789

Fuse Rating: 20 A

Diagnostic Specifications

Diagnostic interface: OBD-II

Fault Codes

B1234
B1235
B1236

Sensor Check interval: Every 10,000 miles

Self Diagnosis Mode: true

Diagnostic Tool Compatibility

BMW ISTA
Generic OBD-II Scanners

Maintenance Specifications

Refrigerant Recharge interval: 24 months

System Pressure Check interval: 12 months

Blower Motor inspection Interval: 15,000 miles

Compressor Belt Tension: 500 ± 50 N

Belt Replacement interval: 60,000 miles

Service Information Service

Detailed service requirements and schedules for the HVAC system

15,000

Replace cabin microfilter
Inspect blower motor
Check refrigerant level
Inspect compressor belt tension

Ensure all connections are secure and free of debris

30,000

Recharge refrigerant
Inspect evaporator and condenser
Check system pressure
Inspect electrical connections

Use only BMW-approved refrigerant and lubricants

60,000

Replace compressor belt
Inspect heater core
Check auxiliary heater functionality
Perform full system diagnostic

Replace any worn or damaged components immediately

Frequently Asked Questions

Find answers to common questions about torque specifications

What is the refrigerant type and capacity for the 2018-Present BMW 640i HVAC system?

The HVAC system in the 2018-Present BMW 640i uses R1234yf refrigerant. The total system capacity is approximately 525 grams (18.5 ounces). Always ensure the refrigerant is handled by a certified technician to avoid system damage or personal injury.

How do I reset the HVAC system in my BMW 640i?

To reset the HVAC system, turn the ignition to the ON position without starting the engine. Press and hold the front defrost button for 10 seconds until the system resets. This procedure clears any stored error codes and recalibrates the system. Refer to the owner's manual for detailed instructions.

What is the recommended cabin air filter replacement interval for the BMW 640i?

The cabin air filter should be replaced every 15,000 to 30,000 miles or as specified in the maintenance schedule. A clogged filter can reduce HVAC efficiency and air quality. Use only genuine BMW filters to ensure proper fit and performance.

What are the common symptoms of a failing HVAC blower motor in the BMW 640i?

Common symptoms include unusual noises (whining or grinding), reduced airflow, or complete failure of the blower motor. These issues may be caused by a faulty motor, resistor, or wiring. Diagnose and repair by a certified technician to avoid further damage.

How does the automatic climate control system work in the BMW 640i?

The automatic climate control system uses multiple sensors to monitor cabin temperature, humidity, and sunlight. It adjusts fan speed, air distribution, and temperature to maintain the desired comfort level. The system also includes a microfilter to improve air quality.

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 640i HVAC System Overview

Coming Soon

Detailed technical overview of the HVAC system, including components, operation, and maintenance tips.

Refrigerant Handling and Safety Guidelines

Coming Soon

Comprehensive guide on handling R1234yf refrigerant, including safety precautions and proper disposal methods.

Cabin Air Filter Replacement Procedure

Coming Soon

Step-by-step instructions for replacing the cabin air filter in the BMW 640i, including tools required and safety tips.

Diagnosing HVAC Blower Motor Issues

Coming Soon

Technical guide for diagnosing and troubleshooting common blower motor problems in the BMW 640i.

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