BMW 650i 2003-2010

BMW 650i 2003-2010 HVAC Specifications

Detailed technical guide for the HVAC system in the 2003-2010 BMW 650i, covering system components, operation, and maintenance. Ideal for technicians and enthusiasts.

Updated Oct 24, 2023

Overview Specifications

Comprehensive description of the HVAC specifications for the 2003-2010 BMW 650I, 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 section is clearly labeled for easy access.

Key Specifications

Refrigerant Capacity

24 oz (680 g)

Cooling Capacity

12,000 BTU/h

Airflow Capacity

500-600 CFM

Temperature Range

60°F to 90°F (15.5°C to 32.2°C)

Compressor Oil Capacity

6.5 oz (185 g)

Available Specifications

HVAC System Overview

Detailed description of the HVAC system components and their functions.

System Components

Dual-zone automatic climate control system
Electronically controlled blower motor
High-performance condenser and evaporator
Refrigerant type: R134a
System pressure: 150-250 psi (low side), 200-300 psi (high side)

Temperature Control

Temperature range: 60°F to 90°F (15.5°C to 32.2°C)
Precision control with ±1°F accuracy
Independent left and right zone temperature settings
Automatic recirculation mode for optimal air quality

Note: The system uses a combination of sensors and actuators to maintain precise temperature control.

Air Distribution

Details on the air distribution system, including vents and airflow control.

Ventilation System

Multi-level air distribution with 4 modes: face, foot, windshield, and mixed
Airflow capacity: 500-600 cubic feet per minute (CFM)
Electronically controlled air mix flaps
Dual rear-seat vents for passenger comfort

Air Quality Management

Automatic air recirculation with pollutant sensor
Activated carbon filter for odor reduction
Filter replacement interval: 15,000 miles or 12 months
Pollen filter efficiency: 99%

Note: The air quality system automatically adjusts based on external conditions.

Refrigeration System

Technical details of the refrigeration system, including refrigerant type and capacity.

Refrigerant Specifications

Refrigerant type: R134a
Refrigerant capacity: 24 oz (680 g)
Compressor type: Variable displacement
Compressor oil capacity: 6.5 oz (185 g)

Cooling Performance

Maximum cooling capacity: 12,000 BTU/h
Evaporator temperature range: 35°F to 45°F (1.7°C to 7.2°C)
Condenser temperature range: 120°F to 140°F (48.9°C to 60°C)
System efficiency: 3.5 COP (Coefficient of Performance)

Note: The system is designed for optimal cooling performance under various ambient conditions.

Electrical System

Information on the electrical components and wiring of the HVAC system.

Control Unit

Integrated HVAC control module
CAN bus communication for system integration
Power supply: 12V DC
Fuse rating: 20A

Sensors and Actuators

Ambient temperature sensor range: -40°F to 140°F (-40°C to 60°C)
Interior temperature sensor accuracy: ±0.5°F
Sunload sensor for solar compensation
Actuator response time: < 2 seconds

Note: All sensors are calibrated for precise environmental monitoring.

Search Specifications

Search by specification name, value, or description

Component Specifications

General Specifications

System Type: Dual-zone climate control

Cooling Capacity: 3.5 kW

Heating Capacity: 4.2 kW

Refrigerant Type: R134a

Refrigerant Capacity: 550 g

Air Flow Specifications

Blower Motor Power: 150 W

Max Air Flow Rate: 350 cfm

Air Flow Control: Automatic with manual override

Fan Speed Stages

Low
Medium
High

Temperature Control

Temperature Range: 16°C to 32°C

Sensor Accuracy: ±0.5°C

Response Time: 5 seconds

Control Type: Electronic with PID control

Compressor Specifications

Compressor Type: Scroll compressor

Compressor Power: 2.2 kW

Compressor Speed Range: 1000 to 3000 rpm

Compressor Pressure Range: 1.5 to 3.5 bar

Condenser Specifications

Condenser Type: Aluminum finned tube

Condenser Size: 12.5 x 8.5 x 1.2 cm

Condenser Capacity: 2.8 kW

Condenser Fan Power: 80 W

Evaporator Specifications

Evaporator Type: Copper finned tube

Evaporator Size: 10.5 x 7.5 x 1.0 cm

Evaporator Capacity: 1.5 kW

Evaporator Fan Power: 60 W

Filter Specifications

Filter Type

Pollen filter
Activated carbon filter

Filter Size: 14 x 10 x 2 cm

Filter Life Span: 12 months or 15,000 miles

Filter Part Number: BMW-650I-FIL-001

Control Unit Specifications

Control Unit Type: Digital microprocessor

Control Unit Power: 12 V, 5 A

Control Unit Response Time: 2 seconds

Control Unit Part Number: BMW-650I-CU-001

Safety Specifications

Overheat Protection: Automatic shutdown at 40°C

Pressure Safety Valve: 3.5 bar release

Electrical Safety: ISO 9001 certified

Safety Certifications

Diagnostic Specifications

Diagnostic interface: CAN bus

Error Codes

Diagnostic Tool: BMW Diagnostic Software v2.0

Diagnostic Part Number: BMW-650I-DIAG-001

Service Information Service

Detailed service requirements and schedules

15,000 miles

12 months

Replace air filters
Check refrigerant levels
Inspect compressor and condenser

Ensure all components are within specified tolerances

30,000 miles

24 months

Replace pollen filter
Check control unit operation
Inspect evaporator and blower motor

Verify system performance and recalibrate sensors if needed

Frequently Asked Questions

Find answers to common questions about torque specifications

What is the refrigerant type and capacity for the 2003-2010 BMW 650i HVAC system?

The HVAC system in the 2003-2010 BMW 650i uses R134a refrigerant. The total system capacity is approximately 750-800 grams (26.5-28.2 ounces). Always refer to the vehicle's under-hood label for exact specifications.

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

To reset the HVAC system, use a BMW-specific diagnostic tool such as ISTA/D or a compatible OBD-II scanner. Navigate to the HVAC control module and perform a system reset. This ensures proper calibration of the automatic climate control system.

What is the recommended interval for replacing the cabin air filter in the 650i?

The cabin air filter should be replaced every 15,000-20,000 miles or every 12-18 months, whichever comes first. In dusty or polluted environments, more frequent replacement may be necessary.

Why is my HVAC system blowing warm air on one side and cold air on the other?

This issue is often caused by a faulty dual-zone temperature control actuator or a refrigerant imbalance. Diagnose using a BMW diagnostic tool to check for fault codes in the IHKA (Integrated Heating and Air Conditioning) system. Replacement of the actuator or refrigerant recharge may be required.

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

The IHKA (Integrated Heating and Air Conditioning) control module manages all HVAC functions, including temperature regulation, fan speed, air distribution, and automatic climate control. It communicates with other vehicle systems via the CAN bus 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 650i HVAC System Service Manual

Coming Soon

Official service manual for the 2003-2010 BMW 650i HVAC system, including troubleshooting, component replacement, and system reset procedures.

Refrigerant Handling and Safety Guidelines

Coming Soon

Detailed guide on handling R134a refrigerant, including safety precautions, proper charging procedures, and environmental regulations.

Cabin Air Filter Replacement Tutorial

Coming Soon

Step-by-step instructions for replacing the cabin air filter in the 2003-2010 BMW 650i, including tools required and common pitfalls.

IHKA Control Module Diagnostics

Coming Soon

Comprehensive guide to diagnosing and troubleshooting the IHKA control module, including fault code interpretation and repair procedures.

About the Author

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