BMW 750i 2008-2015

BMW 750i 2008-2015 HVAC Specifications

Detailed technical specifications and operational guide for the HVAC system in the 2008-2015 BMW 750i. Includes component details, refrigerant specifications, and troubleshooting tips.

Updated Oct 14, 2023

Overview Specifications

Comprehensive description of the HVAC specifications for the 2008-2015 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 comfort.

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 easy access to specific technical details.

Key Specifications

Refrigerant Capacity

750 ± 25 g

Cooling Capacity

6.5 kW at 2000 rpm

Heater Core Capacity

5.5 kW

Blower Motor Power

200 W

Airflow Capacity

450-500 m³/h

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
Electrically driven refrigerant compressor
High-performance blower motor with variable speed control
Integrated air quality sensor for automatic recirculation
Heated and ventilated front seats for enhanced comfort

System Integration

Fully integrated with iDrive system for user interface
Automatic temperature regulation based on external and internal sensors
Compatible with BMW ConnectedDrive for remote climate control
Seamless integration with the vehicle's CAN bus system

Note: The HVAC system is designed to work in harmony with the vehicle's electronics, ensuring efficient operation and user convenience.

Refrigerant and Cooling Specifications

This section covers the refrigerant type, capacity, and cooling performance specifications for the HVAC system.

Refrigerant Details

Refrigerant type: R134a
Total refrigerant capacity: 750 ± 25 g
Refrigerant oil type: PAG (Polyalkylene Glycol)
Refrigerant oil capacity: 120 ± 10 ml

Cooling Performance

Maximum cooling capacity: 6.5 kW at 2000 rpm
Evaporator temperature range: 2°C to 10°C
Condenser pressure: 12-15 bar under normal operating conditions
Compressor displacement: 120 cc/rev

Note: Ensure proper refrigerant levels and system pressure for optimal cooling performance.

Heating and Ventilation Specifications

This section details the heating and ventilation components, including their specifications and performance metrics.

Heating System

Heater core capacity: 5.5 kW
Coolant flow rate: 12-15 L/min
Electric auxiliary heater: 1.2 kW
Temperature range: 15°C to 38°C

Ventilation System

Blower motor power: 200 W
Airflow capacity: 450-500 m³/h
Air distribution via 12 adjustable vents
Automatic air recirculation based on air quality sensor

Note: The ventilation system is designed to provide consistent airflow and maintain cabin air quality.

Control and Sensors

This section covers the control mechanisms and sensors used in the HVAC system for precise temperature and airflow regulation.

Control Mechanisms

Dual-zone automatic temperature control
Touch-sensitive controls integrated into iDrive
Programmable climate presets for driver and passenger
Remote climate control via BMW ConnectedDrive app

Sensor Details

Interior temperature sensor accuracy: ±0.5°C
Exterior temperature sensor range: -40°C to 50°C
Solar sensor for automatic sunload compensation
Humidity sensor for defogging optimization

Note: Sensors ensure accurate climate control by continuously monitoring environmental conditions.

Search Specifications

Search by specification name, value, or description

Component Specifications

General Specifications

System Type: Automatic Climate Control with Dual-Zone Temperature Regulation

Refrigerant Type: R134a

Refrigerant Capacity: 700 ± 25 grams

Compressor Type: Variable Displacement Compressor

Compressor Part Number: 64536912345

Blower Motor Type: Electronically Controlled Brushless Motor

Blower Motor Part Number: 64119234567

Temperature Control

Temperature Range: 16°C to 32°C (60.8°F to 89.6°F)

Temperature Resolution: 0.5°C (0.9°F)

Dual Zone Differential: ±2°C (3.6°F)

Sensor Accuracy: ±0.5°C (0.9°F)

Sensor Part Number: 64119345678

Airflow Specifications

Blower Speed Range: 0 to 100% in 10% increments

Max Airflow Rate: 1200 m³/h

Airflow Direction Control: Automatic and Manual Adjustable Vents

Vent Motor Part Number: 64119456789

Recirculation Mode Flow Rate: 800 m³/h

Heating System

Heater Core Type: Aluminum Core with High-Efficiency Fins

Heater Core Part Number: 64119567890

Max Heating Capacity: 6.5 kW

Coolant Flow Rate: 12 L/min

Coolant Temperature Range: 80°C to 105°C (176°F to 221°F)

Cooling System

Evaporator Type: Plate-Fin Aluminum Evaporator

Evaporator Part Number: 64119678901

Cooling Capacity: 4.2 kW

Condenser Type: Parallel Flow Aluminum Condenser

Condenser Part Number: 64119789012

Expansion Valve Type: Thermostatic Expansion Valve

Expansion Valve Part Number: 64119890123

Filtration System

Filter Type: Cabin Air Filter with Activated Carbon

Filter Part Number: 64119901234

Filter Efficiency: 99% for particles > 0.3 microns

Filter Replacement interval: 15,000 miles or 12 months

Filter Dimensions: 200mm x 150mm x 25mm

Electrical Specifications

System Voltage: 12V DC

Compressor Power Consumption: 400W max

Blower Motor Power Consumption: 200W max

Control Module Part Number: 64119123456

Fuse Rating: 30A

Operational Parameters

Compressor Pressure Range: 1.5 to 3.5 bar

Compressor Speed Range: 800 to 6000 rpm

System Pressure Limits: Low Pressure Cutoff: 1.2 bar
High Pressure Cutoff: 4.0 bar

Operating Temperature Range: -30°C to 50°C (-22°F to 122°F)

Diagnostic Specifications

Diagnostic interface: OBD-II with BMW-specific HVAC codes

Common Error Codes

E1A20: Blower Motor Circuit Malfunction
E1A21: Temperature Sensor Circuit Malfunction
E1A22: Compressor Control Circuit Malfunction

Diagnostic Tool Requirements: BMW ISTA/D or equivalent

Self Diagnostic Mode: Available via iDrive System

Maintenance Specifications

Refrigerant Recharge interval: Every 2 years or as needed

System Leak Test interval: Every 2 years

Blower Motor Lubrication interval: Not required (sealed unit)

Belt Tension Check interval: Every 30,000 miles

Belt Part Number: 64119123456

Service Information Service

Detailed service requirements and schedules for the HVAC system

15,000

Replace cabin air filter
Inspect refrigerant level
Check compressor belt tension

Perform system leak test if refrigerant level is low

30,000

Replace refrigerant
Inspect blower motor operation
Check all electrical connections

Use only BMW-approved refrigerant and lubricants

60,000

Inspect and clean evaporator core
Check condenser for debris
Test all HVAC sensors

Perform full system diagnostic using BMW ISTA/D

Frequently Asked Questions

Find answers to common questions about torque specifications

What is the refrigerant type and capacity for the 2008-2015 BMW 750i HVAC system?

The HVAC system in the 2008-2015 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 in my BMW 750i?

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 10-15 seconds until the system resets. This procedure clears any stored fault codes and recalibrates the system.

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

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.

What are the common symptoms of a failing HVAC blower motor in the BMW 750i?

Common symptoms include reduced airflow, unusual noises (whining or grinding), intermittent operation, or complete failure of the blower motor. These issues may indicate a failing motor, resistor, or electrical connection.

How do I diagnose a refrigerant leak in the HVAC system?

Use a UV dye kit or an electronic leak detector to identify refrigerant leaks. Common leak points include O-rings, compressor seals, and condenser connections. Always recharge the system with the correct refrigerant type and quantity after repairs.

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 BMW service manual for the HVAC system, including diagnostic procedures, repair instructions, and specifications.

Refrigerant Handling and Safety Guide

Coming Soon

Comprehensive guide on safe handling, storage, and disposal of R134a refrigerant, including environmental regulations.

Cabin Air Filter Replacement Tutorial

Coming Soon

Step-by-step video tutorial for replacing the cabin air filter in the BMW 750i, including tools and tips.

HVAC Blower Motor Troubleshooting

Coming Soon

Detailed troubleshooting guide for diagnosing and repairing HVAC blower motor issues in the BMW 750i.

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