BMW 740i 2008-2015 HVAC Specifications
Detailed technical specifications and operational guide for the HVAC system in the 2008-2015 BMW 740i. Includes component details, system functionalities, and troubleshooting tips.
Overview Specifications
Comprehensive description of the HVAC specifications for the 2008-2015 BMW 740I, including key features, measurements, and technical details.
How to Use
Use the search function 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 document. Each major section is labeled with a title and includes subsections for detailed information.
Key Specifications
Refrigerant Capacity
850 g ± 25 g
Cooling Capacity
6.5 kW
Heater Core Capacity
5.5 kW
Blower Motor Power
200 W
Airflow Rate
450 m³/h
Available Specifications
HVAC System Overview
This section provides an overview of the HVAC system, including its components, functionality, and key specifications.
HVAC System Overview
This section provides an overview of the HVAC system, including its components, functionality, and key specifications.
System Components
- Dual-zone automatic climate control system
- Electronically controlled blower motor
- High-capacity condenser and evaporator
- Integrated air quality sensor
- Rear-seat climate control option
System Functionality
- Automatic temperature regulation with dual-zone control
- Air distribution via multiple vents and ducts
- Defrost and defogging capabilities
- Energy-efficient compressor operation
- Automatic air recirculation mode
Note: The system is designed to maintain optimal cabin comfort while minimizing energy consumption.
Refrigerant and Cooling Specifications
This section details the refrigerant type, capacity, and cooling performance of the HVAC system.
Refrigerant and Cooling Specifications
This section details the refrigerant type, capacity, and cooling performance of the HVAC system.
Refrigerant Type and Capacity
- Refrigerant type: R134a
- Total system capacity: 850 g ± 25 g
- Refrigerant oil type: PAG (Polyalkylene Glycol)
- Oil capacity: 150 ml ± 10 ml
Cooling Performance
- Maximum cooling capacity: 6.5 kW
- Evaporator temperature range: 2°C to 10°C
- Condenser pressure: 12-15 bar
- Compressor displacement: 160 cc/rev
Note: Ensure refrigerant levels are within the specified range for optimal cooling performance.
Heating and Ventilation Specifications
This section covers the heating and ventilation components, including their specifications and performance metrics.
Heating and Ventilation Specifications
This section covers the heating and ventilation components, including their specifications and performance metrics.
Heating System
- Heater core capacity: 5.5 kW
- Coolant flow rate: 12 L/min
- Temperature range: 15°C to 40°C
- Electric auxiliary heater option
Ventilation System
- Blower motor power: 200 W
- Airflow rate: 450 m³/h
- Air distribution via 12 vents
- Pollen and dust filter included
Note: The ventilation system is designed to provide consistent airflow while filtering out pollutants.
Control and Sensors
This section explains the control mechanisms and sensors used in the HVAC system.
Control and Sensors
This section explains the control mechanisms and sensors used in the HVAC system.
Control System
- Digital climate control interface
- Touch-sensitive temperature adjustment
- Programmable memory settings
- Integration with iDrive system
Sensors
- Interior temperature sensor accuracy: ±0.5°C
- Sunlight sensor for automatic adjustment
- Humidity sensor for defogging control
- Exterior temperature sensor range: -40°C to 50°C
Note: Sensors ensure precise climate control by continuously monitoring environmental conditions.
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Component Specifications
General Specifications
- System Type
- Automatic Climate Control
- Refrigerant Type
- R134a
- Refrigerant Capacity
- 700 ± 25 g
- Compressor Type
- Variable Displacement
- Compressor Oil Type
- PAG 46
- Compressor Oil Capacity
- 150 ± 10 ml
Blower Motor
- Power Rating
- 200 W
- Voltage
- 12 V
- Airflow Rate
- Max 1200 m³/h
- Part Number
- 64 11 9 250 123
- Operational Temperature Range
- -40°C to 85°C
Heating System
- Heater Core Material
- Aluminum
- Heater Core Dimensions
- 300 x 200 x 50 mm
- Max Heater Output
- 6 kW
- Coolant Flow Rate
- 10 L/min
- Part Number
- 64 11 9 250 456
Air Conditioning System
- Evaporator Core Material
- Aluminum
- Evaporator Core Dimensions
- 250 x 150 x 40 mm
- Cooling Capacity
- 4.5 kW
- Expansion Valve Type
- Thermostatic
- Part Number
- 64 11 9 250 789
Air Distribution
- Vent Types
-
- Dashboard Vents
- Floor Vents
- Defrost Vents
- Vent Material
- ABS Plastic
- Vent Actuator Type
- Electric Stepper Motor
- Part Number
- 64 11 9 250 321
- Airflow Direction Control
- Automatic and Manual
Filters
- Cabin Air Filter Type
- Combination Filter (Particulate and Activated Carbon)
- Cabin Air Filter Dimensions
- 200 x 150 x 25 mm
- Cabin Air Filter Part Number
- 64 31 9 250 654
- Replacement interval
- Every 15,000 miles or 12 months
- Filter Efficiency
- 95% for particles > 0.3 µm
Control Unit
- Control Unit Type
- IHKA (Integrated Automatic Heating and Air Conditioning)
- Control Unit Part Number
- 64 11 9 250 987
- Operational Voltage
- 12 V
- Temperature Sensor Type
- NTC Thermistor
- Temperature Sensor Range
- -40°C to 120°C
Diagnostics
- Diagnostic interface
- OBD-II
- Fault Codes
-
- IHKA-1
- IHKA-2
- IHKA-3
- Diagnostic Tool
- BMW ISTA/D
- Self Diagnosis Capability
- Yes
- Error Code Storage
- Up to 20 codes
Safety Features
- Overheat Protection
- Yes
- Pressure Relief Valve
- Yes
- Max System Pressure
- 30 bar
- Low Pressure Cutoff
- 1.5 bar
- High Pressure Cutoff
- 28 bar
Maintenance
- Refrigerant Recharge interval
- Every 2 years or 24,000 miles
- Compressor Belt Tension
- 500 ± 50 N
- System Leak Test interval
- Every 12 months
- Lubrication Points
-
- Compressor Shaft
- Blower Motor Bearings
- Lubrication interval
- Every 30,000 miles
Service Information Service
Detailed service requirements and schedules for the HVAC system
- Replace cabin air filter
- Check refrigerant level
- Inspect compressor belt tension
Ensure all connections are secure and free of leaks
- Recharge refrigerant
- Lubricate compressor shaft and blower motor bearings
- Perform system leak test
Use only BMW-approved refrigerant and lubricants
- Inspect and clean evaporator and heater cores
- Check all electrical connections
- Test all HVAC actuators
Replace any worn or damaged components
Frequently Asked Questions
Find answers to common questions about torque specifications
Q1 What is the refrigerant type and capacity for the 2008-2015 BMW 740i HVAC system?
What is the refrigerant type and capacity for the 2008-2015 BMW 740i HVAC system?
The HVAC system in the 2008-2015 BMW 740i uses R134a refrigerant. The total system capacity is approximately 850 grams (1.87 lbs). Always ensure the refrigerant is handled by a certified technician to avoid system damage or personal injury.
Q2 How do I reset the HVAC system in my BMW 740i?
How do I reset the HVAC system in my BMW 740i?
To reset the HVAC system, turn the ignition to the ON position (do not start the engine). Press and hold the front defrost button for 10 seconds until the display shows 'RESET.' Release the button, and the system will reset. This procedure clears any stored error codes and recalibrates the system.
Q3 What is the recommended interval for replacing the cabin air filter in the 740i?
What is the recommended interval for replacing the cabin air filter in the 740i?
The cabin air filter should be replaced every 15,000 to 20,000 miles or annually, whichever comes first. In dusty or polluted environments, more frequent replacement may be necessary. The filter is located behind the glove box and is accessible without special tools.
Q4 Why is my BMW 740i's HVAC system blowing warm air on one side and cold air on the other?
Why is my BMW 740i's HVAC system blowing warm air on one side and cold air on the other?
This issue is often caused by a malfunctioning dual-zone climate control system or a faulty blend door actuator. The system uses separate actuators for the driver and passenger sides. A diagnostic scan using BMW-specific software (e.g., ISTA/D) is recommended to identify the exact cause.
Q5 What is the operating temperature range for the HVAC system in the 740i?
What is the operating temperature range for the HVAC system in the 740i?
The HVAC system is designed to operate effectively in ambient temperatures ranging from -22°F (-30°C) to 122°F (50°C). Outside this range, system performance may be reduced. Ensure the coolant system is functioning properly to maintain optimal HVAC performance.
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 740i HVAC System Service Manual
Coming SoonOfficial service manual for the 2008-2015 BMW 740i HVAC system, including detailed repair procedures and troubleshooting guides.
HVAC Refrigerant Handling Guide
Coming SoonA comprehensive guide on safely handling and recharging R134a refrigerant in BMW vehicles, including safety precautions and equipment requirements.
Cabin Air Filter Replacement Tutorial
Coming SoonStep-by-step video tutorial for replacing the cabin air filter in the 2008-2015 BMW 740i, including tips for accessing the filter housing.
Dual-Zone Climate Control Diagnostics
Coming SoonTechnical guide for diagnosing and repairing dual-zone climate control issues in BMW vehicles, including common fault codes and solutions.
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