BMW 760i 2001-2008

BMW 760i 2001-2008 HVAC Specifications

Detailed technical specifications and operational guide for the HVAC system in the 2001-2008 BMW 760i. Includes component details, troubleshooting, and maintenance tips for the E65/E66 chassis.

Updated Oct 24, 2023

Overview Specifications

Comprehensive description of the HVAC specifications for the 2001-2008 BMW 760I, 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 contains subsections for detailed information.

Key Specifications

Refrigerant Capacity

850 g ± 20 g

Heater Core Flow Rate

12 L/min

Blower Motor Power

200 W

Airflow Capacity

600 m³/h

Temperature Range

16°C to 32°C

Available 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 recirculation mode with automatic switching
Defrost and defogging functions with humidity control
Adjustable airflow distribution via multiple vents
Energy-saving mode for reduced power consumption

Note: The system uses a combination of sensors and actuators to maintain optimal cabin temperature and air quality.

Refrigerant System

This section covers the refrigerant system, including specifications, capacity, and maintenance requirements.

Refrigerant Type and Capacity

Refrigerant type: R134a
Total system capacity: 850 g ± 20 g
Refrigerant oil type: PAG (Polyalkylene Glycol)
Oil capacity: 150 ml ± 10 ml
Operating pressure: High side - 15-20 bar, Low side - 2-3 bar

Refrigerant System Components

High-efficiency condenser with integrated receiver-drier
Variable displacement compressor with magnetic clutch
Thermal expansion valve for precise refrigerant flow control
Evaporator with frost protection sensor
Pressure sensors for system monitoring

Note: Ensure proper refrigerant levels and system pressure during maintenance to avoid performance issues.

Heating and Ventilation

This section details the heating and ventilation components, including specifications and operational details.

Heating System

High-capacity heater core with dual-zone control
Coolant flow rate: 12 L/min at full load
Heater blower motor power: 200 W
Temperature range: 16°C to 32°C (60°F to 90°F)
Integrated auxiliary heater for cold climates

Ventilation System

Multi-speed blower fan with 8 adjustable speeds
Airflow capacity: 600 m³/h at maximum speed
Dual-zone air distribution with adjustable vents
Integrated cabin air filter with activated charcoal
Automatic air recirculation based on external air quality

Note: Regularly replace the cabin air filter to maintain optimal airflow and air quality.

Control System

This section explains the HVAC control system, including sensors, actuators, and user interface.

Control Interface

Dual-zone digital climate control panel
LCD display with temperature and mode indicators
Adjustable fan speed and airflow direction
Integrated memory for driver preferences
Voice control compatibility for hands-free operation

Sensors and Actuators

Interior temperature sensors (2 zones)
Exterior temperature sensor with solar compensation
Humidity sensor for defogging control
Actuators for air mix, recirculation, and vent control
CAN bus communication for system integration

Note: Ensure all sensors are calibrated and functioning correctly for accurate temperature control.

Search Specifications

Search by specification name, value, or description

Component Specifications

General Specifications

System Type: Automatic Climate Control

Refrigerant Type: R134a

Refrigerant Capacity: 850 ± 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 6 904 123

Tolerance: ± 5% airflow variance

Heating System

Heater Core Material: Aluminum

Heater Core Flow Rate: 8-10 L/min

Coolant Temperature Range: 80-105 °C

Part Number: 64 11 6 904 456

Max Pressure: 2.5 bar

Air Conditioning

Evaporator Material: Aluminum

Evaporator Temperature Range: 2-10 °C

Condenser Material: Aluminum

Condenser Pressure Range: 10-25 bar

Part Number Evaporator: 64 11 6 904 789

Part Number Condenser: 64 11 6 904 321

Air Distribution

Vent Types

Dashboard vents
Floor vents
Defrost vents

Vent Material: ABS Plastic

Airflow Direction Control: Automatic and Manual

Part Number Vent Motor: 64 11 6 904 654

Tolerance: ± 2° airflow angle

Sensors

interior Temperature Sensor: Range: -40 to 85 °C
Accuracy: ± 0.5 °C
Part Number: 64 11 6 904 987

Exterior Temperature Sensor: Range: -40 to 85 °C
Accuracy: ± 1 °C
Part Number: 64 11 6 904 876

Sunlight Sensor: Range: 0-1000 W/m²
Accuracy: ± 5%
Part Number: 64 11 6 904 765

Control Unit

Microprocessor Type: 32-bit

Operating Voltage: 12 V

Temperature Setting Range: 16-32 °C

Part Number: 64 11 6 904 543

Tolerance: ± 0.5 °C

Filters

Cabin Air Filter Type: Activated Carbon

Cabin Air Filter Efficiency: 95%

Replacement interval: 15,000 miles or 12 months

Part Number: 64 11 6 904 234

Max Pressure Drop: 50 Pa

Operational Parameters

Cooling Capacity: 5-7 kW

Heating Capacity: 4-6 kW

Max System Pressure: 30 bar

Min System Pressure: 1.5 bar

Operating Temperature Range: -30 to 50 °C

Diagnostics

Fault Codes

P0532
P0533
P0534

Diagnostic Tool: BMW DIS or ISTA

Self Diagnosis Capability: Yes

Error Tolerance: ± 2%

Service Information Service

Detailed service requirements and schedules for the HVAC system

15,000

Inspect and replace cabin air filter
Check refrigerant level and pressure
Inspect blower motor and vents

Ensure all connections are secure and free of debris

30,000

Inspect and clean evaporator and condenser
Check compressor oil level
Test all sensors and control units

Use only BMW-approved refrigerant and oil

60,000

Replace refrigerant
Inspect and replace heater core if necessary
Perform full system diagnostic

Ensure all components meet manufacturer specifications

Frequently Asked Questions

Find answers to common questions about torque specifications

What is the refrigerant type and capacity for the HVAC system in the 2001-2008 BMW 760i?

The HVAC system in the 2001-2008 BMW 760i uses R134a refrigerant. The total system capacity is approximately 850-900 grams (30-32 ounces). Always refer to the vehicle's service manual for exact specifications.

How do I reset the HVAC system after replacing components?

After replacing HVAC components, such as the compressor or control module, a system reset is required. Use a BMW-specific diagnostic tool (e.g., ISTA/D or INPA) to reset the system and recalibrate the control module. Failure to reset may result in improper operation.

What is the recommended interval for HVAC system maintenance?

BMW recommends inspecting the HVAC system every 30,000 miles or 24 months, whichever comes first. This includes checking refrigerant levels, inspecting for leaks, and ensuring the cabin air filter is clean. Regular maintenance prevents system inefficiency and potential failures.

How do I diagnose a weak airflow from the HVAC vents?

Weak airflow can result from a clogged cabin air filter, a malfunctioning blower motor, or obstructed ducts. First, inspect and replace the cabin air filter if necessary. If the issue persists, check the blower motor and resistor for proper operation. Use a multimeter to test electrical connections.

What are the symptoms of a failing HVAC control module?

Symptoms include unresponsive climate controls, inconsistent temperature regulation, or error codes related to the HVAC system. Diagnose using a BMW-specific diagnostic tool to confirm the issue. Replacement modules must be programmed to 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 HVAC System Overview

Coming Soon

Detailed guide on the HVAC system architecture, components, and operation for the 2001-2008 BMW 760i.

Refrigerant Handling and Safety

Coming Soon

Safety guidelines and procedures for handling R134a refrigerant, including proper charging and leak detection.

HVAC Control Module Programming

Coming Soon

Step-by-step instructions for programming and calibrating the HVAC control module using BMW diagnostic tools.

Cabin Air Filter Replacement Guide

Coming Soon

Instructions for locating and replacing the cabin air filter in the 2001-2008 BMW 760i.

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