BMW 750i 2001-2008

BMW 750i 2001-2008 HVAC Specifications

Detailed technical specifications for the HVAC system in the 2001-2008 BMW 750i, including component details, performance metrics, and troubleshooting tips for the E65/E66 chassis.

Updated Oct 24, 2023

Overview Specifications

Comprehensive description of the HVAC specifications for the 2001-2008 BMW 750i, including key features, measurements, and technical details. This section provides detailed insights into the heating, ventilation, and air conditioning system, ensuring optimal performance and maintenance.

How to Use

Use the search function to locate specific HVAC specifications by entering keywords such as 'blower motor', 'refrigerant capacity', or 'temperature control'. Use exact terms for precise results.

Navigate through the HVAC documentation sections using the table of contents. Each major section is divided into subsections for detailed technical information.

Key Specifications

Refrigerant Capacity

750g ± 20g

Heater Core Output

6.5 kW at 90°C

Blower Motor Airflow

450 m³/h

Compressor Displacement

160 cc/rev

Evaporator Cooling Capacity

4.2 kW

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 cabin air filter system
Refrigerant type: R134a

System Functionality

Automatic temperature regulation for driver and passenger zones
Air distribution control via electronically actuated flaps
Defrost and demist functions with automatic activation
Recirculation mode for improved air quality
Ambient temperature sensor integration

Note: The system uses a CAN bus for communication between components.

Heating System Specifications

Detailed technical specifications and measurements for the heating system components.

Heater Core

Material: Aluminum and plastic composite
Dimensions: 320mm x 220mm x 50mm
Heat output: 6.5 kW at 90°C coolant temperature
Coolant flow rate: 12 L/min
Operating pressure: 1.5 bar

Heater Control Valve

Type: Electrically actuated rotary valve
Voltage: 12V DC
Flow capacity: 8 L/min
Temperature range: -40°C to 120°C
Response time: < 2 seconds

Air Conditioning System Specifications

Technical details and measurements for the air conditioning system components.

Compressor

Type: Swash plate variable displacement
Displacement: 160 cc/rev
Refrigerant capacity: 750g ± 20g
Maximum pressure: 30 bar
Power consumption: 2.5 kW

Evaporator

Material: Aluminum
Dimensions: 400mm x 250mm x 60mm
Cooling capacity: 4.2 kW
Airflow resistance: 120 Pa
Refrigerant inlet/outlet diameter: 10mm/12mm

Note: The evaporator is equipped with a temperature sensor for frost protection.

Ventilation System Specifications

Technical specifications and measurements for the ventilation system components.

Blower Motor

Type: Brushless DC motor
Voltage: 12V DC
Power output: 200W
Airflow capacity: 450 m³/h
Noise level: < 65 dB

Air Distribution Flaps

Material: Reinforced plastic
Actuation: Electric servo motors
Position feedback: Integrated potentiometers
Response time: < 1 second
Operating temperature range: -30°C to 85°C

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 grams

Compressor Type: Variable Displacement

Compressor Oil Type: PAG oil

Compressor Oil Capacity: 150 ± 10 ml

Blower Motor

Power Rating: 200W

Voltage: 12V DC

Airflow Rate: 500-1500 m³/h

Part Number: 64 11 6 923 456

Heating System

Heater Core Material: Aluminum

Heater Core Dimensions: 300mm x 200mm x 50mm

Max Heater Output: 6 kW

Coolant Flow Rate: 10-15 L/min

Part Number: 64 11 6 923 457

Air Conditioning

Evaporator Material: Aluminum

Evaporator Dimensions: 250mm x 150mm x 30mm

Cooling Capacity: 4.5 kW

Expansion Valve Type: Thermostatic

Part Number: 64 11 6 923 458

Ventilation System

Air Distribution: Multi-zone

Airflow Direction Control: Automatic

Recirculation Mode: Automatic/Manual

Filter Type: Cabin Air Filter

Filter Part Number: 64 31 6 923 459

Filter Replacement interval: 15,000 miles or 12 months

Control System

Control Unit Type: IHKA (Integrated Heating and Air Conditioning)

Sensor Types

Interior Temperature Sensor
Exterior Temperature Sensor
Sunlight Sensor

Sensor Part Numbers

64 11 6 923 460
64 11 6 923 461
64 11 6 923 462

Operating Temperature Range: -40°C to 85°C

Voltage Supply: 12V DC

Ducting And Vents

Duct Material: Plastic

Vent Material: ABS Plastic

Vent Adjustment: Manual/Automatic

Part Number: 64 11 6 923 463

Pressure And Temperature Limits

High Pressure Cutoff: 30 bar

Low Pressure Cutoff: 1.5 bar

Max Operating Temperature: 120°C

Min Operating Temperature: -40°C

Diagnostic Specifications

Diagnostic Tool: BMW DIS/GT1

Fault Codes

IHKA-1
IHKA-2
IHKA-3

Diagnostic Procedures

System Pressure Check
Sensor Calibration
Control Unit Reset

Maintenance Specifications

Refrigerant Recharge interval: 24 months

Compressor Belt Tension: 500-700 N

Belt Replacement interval: 60,000 miles

System Leak Check interval: 12 months

Service Information Service

Detailed service requirements and schedules for the HVAC system

15,000

Replace Cabin Air Filter
Check Refrigerant Level
Inspect Compressor Belt

Ensure all connections are secure and free of leaks

30,000

Recharge Refrigerant
Inspect Heater Core
Check Blower Motor Operation

Perform a full system diagnostic using BMW DIS/GT1

60,000

Replace Compressor Belt
Inspect Evaporator
Check All Sensors

Replace any worn or damaged components

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 750i?

The HVAC system in the 2001-2008 BMW 750i uses R134a refrigerant. The total system capacity is approximately 850-900 grams (30-32 ounces). Always refer to the vehicle's service manual for precise specifications.

How do I reset the HVAC system after replacing the battery or performing maintenance?

To reset the HVAC system, turn the ignition to the 'ON' position without starting the engine. Set the temperature to maximum heat and fan speed to the lowest setting. Press and hold the 'AUTO' and 'REST' buttons simultaneously for 10 seconds. The system will reset and recalibrate.

What is the recommended interval for replacing the cabin air filter in the 2001-2008 BMW 750i?

The cabin air filter should be replaced every 15,000 to 30,000 miles or every 12-24 months, depending on driving conditions. A clogged filter can reduce HVAC efficiency and air quality.

Why is my 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 heater valve. The 2001-2008 BMW 750i uses a dual-zone system, and uneven temperatures may indicate a need for recalibration or component replacement.

What is the function of the IHKA control module in the HVAC system?

The IHKA (Integrated Automatic Heating and Air Conditioning) control module manages the HVAC system's operations, including temperature regulation, fan speed, and air distribution. It communicates with other vehicle systems to ensure optimal 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 HVAC System Service Manual

Coming Soon

Official service manual for the HVAC system in the 2001-2008 BMW 750i, including troubleshooting, repair procedures, and specifications.

Refrigerant Charging Guide

Coming Soon

Step-by-step guide for safely charging the R134a refrigerant in the HVAC system, including pressure specifications and safety precautions.

Cabin Air Filter Replacement Tutorial

Coming Soon

Detailed instructions for replacing the cabin air filter in the 2001-2008 BMW 750i, including tools required and step-by-step procedures.

IHKA Control Module Diagnostics

Coming Soon

Comprehensive guide to diagnosing and troubleshooting issues with the IHKA control module in the HVAC system.

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