BMW 340i 2005-2011

BMW 340i 2005-2011 HVAC Specifications

Detailed technical specifications for the HVAC system in the 2005-2011 BMW 340I, including component details, performance metrics, and troubleshooting tips.

Updated Oct 24, 2023

Overview Specifications

Comprehensive description of the HVAC specifications for the 2005-2011 BMW 340I, 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

600 ± 20 g

Blower Motor Power

200 W

Maximum Heating Output

6 kW

Maximum Cooling Capacity

4.5 kW

Operating Pressure (High Side)

15-20 bar

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-performance condenser and evaporator
Integrated cabin air filter system
Refrigerant type: R134a

System Functionality

Automatic temperature regulation with dual-zone control
Adjustable airflow distribution (face, foot, windshield)
Defrost and demist functions with automatic activation
Energy-saving mode for reduced power consumption
Integrated air quality sensor for automatic recirculation

Note: The dual-zone system allows the driver and front passenger to set individual temperature preferences.

Refrigerant System Specifications

This section details the refrigerant system, including capacity, pressure, and maintenance requirements.

Refrigerant Capacity

Total refrigerant capacity: 600 ± 20 g
Refrigerant type: R134a
Operating pressure: High side - 15-20 bar, Low side - 2-3 bar
Refrigerant oil capacity: 120 ± 10 ml
Recommended service interval: Every 2 years or 30,000 miles

Refrigerant System Components

High-efficiency condenser with 12 rows
Aluminum evaporator with 16 rows
Thermostatic expansion valve (TXV) for precise flow control
High-pressure switch with a cutoff at 32 bar
Low-pressure switch with a cutoff at 1.5 bar

Note: Ensure proper refrigerant levels to avoid system inefficiency or damage.

Blower Motor and Air Distribution

This section covers the blower motor, air distribution system, and related controls.

Blower Motor Specifications

Blower motor power rating: 200 W
Maximum airflow: 450 m³/h
12-speed electronically controlled fan
Noise level at maximum speed: 65 dB
Service life: 10 years or 150,000 miles

Air Distribution System

Adjustable vents with 4-way directional control
Automatic air recirculation based on cabin air quality
Dual-zone airflow control with independent settings
Defrost vents with optimized airflow for windshield clearing
Footwell vents with adjustable temperature settings

Note: The air distribution system ensures optimal comfort for all occupants.

Heating and Cooling Performance

This section provides details on the heating and cooling performance of the HVAC system.

Heating Performance

Maximum heating output: 6 kW
Heating element type: PTC (Positive Temperature Coefficient)
Time to reach maximum temperature: 5 minutes
Temperature range: 16°C to 32°C
Integrated heat exchanger for efficient operation

Cooling Performance

Maximum cooling capacity: 4.5 kW
Evaporator temperature range: 2°C to 10°C
Time to reach minimum temperature: 7 minutes
Temperature range: 16°C to 32°C
Energy-efficient compressor with variable displacement

Note: The cooling system is designed for rapid temperature reduction and energy efficiency.

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Component Specifications

General Specifications

System Type: Automatic Climate Control

Refrigerant Type: R134a

Refrigerant Capacity: 600 ± 25 grams

Compressor Type: Variable Displacement

Compressor Oil Type: PAG 46

Compressor Oil Capacity: 150 ± 10 ml

Blower Motor

Power Rating: 200W

Voltage: 12V DC

Airflow Rate: Max 450 m³/h

Part Number: 64116920417

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

Heating System

Heater Core Material: Aluminum

Heater Core Flow Rate: 5.5 ± 0.5 liters/min

Heater Core Part Number: 64116920418

Max Heater Output: 6.5 kW

Coolant Temperature Range: 80°C to 105°C

Air Conditioning

Evaporator Material: Aluminum

Evaporator Part Number: 64116920419

Evaporator Temperature Range: 2°C to 10°C

Condenser Material: Aluminum

Condenser Part Number: 64116920420

Condenser Pressure Range: 10 to 30 bar

Air Distribution

Vent Types

Dashboard Vents
Floor Vents
Defrost Vents

Vent Material: ABS Plastic

Vent Actuator Type: Stepper Motor

Vent Actuator Part Number: 64116920421

Airflow Direction Control: Automatic and Manual

Filters

Cabin Air Filter Type: Combination Filter (Particle and Activated Carbon)

Cabin Air Filter Part Number: 64116920422

Filter Replacement interval: 15,000 miles or 12 months

Filter Efficiency: Particle Filtration: 95%, Odor Reduction: 85%

Control Unit

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

Control Unit Part Number: 64116920423

Operational Voltage: 12V DC

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

Humidity Sensor Range: 5% to 95% RH

Sensors

interior Temperature Sensor: Type: NTC Thermistor
Part Number: 64116920424
Range: -40°C to 85°C
Accuracy: ±0.5°C

Exterior Temperature Sensor: Type: NTC Thermistor
Part Number: 64116920425
Range: -40°C to 85°C
Accuracy: ±1°C

Sunlight Sensor: Type: Photodiode
Part Number: 64116920426
Range: 0 to 100,000 Lux
Accuracy: ±5%

Diagnostics

Diagnostic interface: OBD-II

Fault Codes

P0532
P0533
P0534
P0535

Diagnostic Tool: BMW ISTA/D

Self Diagnosis Capability: Yes

Error Code Storage: Up to 20 codes

Safety

High Pressure Cutoff: 30 bar

Low Pressure Cutoff: 2 bar

Overheat Protection: 105°C

Electrical Fuse Rating: 20A

Emergency Shutoff: Automatic in case of system failure

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
Test HVAC control unit functionality

Ensure all connections are secure and free of debris

30,000

Inspect and clean evaporator and condenser
Check heater core for leaks
Inspect all sensors and actuators
Perform system pressure test

Use only BMW-approved refrigerant and lubricants

60,000

Replace refrigerant and oil
Inspect and replace compressor if necessary
Check and recalibrate control unit
Perform full system diagnostic

Ensure all components meet BMW specifications

Frequently Asked Questions

Find answers to common questions about torque specifications

What is the refrigerant type and capacity for the 2005-2011 BMW 340i HVAC system?

The HVAC system in the 2005-2011 BMW 340i uses R134a refrigerant. The total system capacity is approximately 700-750 grams (24.7-26.5 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, a system reset is required. Use a BMW-specific diagnostic tool (e.g., ISTA/D or INPA) to reset the IHKA (Integrated Automatic Heating and Air Conditioning) control module. This ensures proper calibration and functionality.

What is the recommended interval for cabin air filter replacement?

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

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

Weak airflow can result from a clogged cabin air filter, a malfunctioning blower motor, or obstructed air ducts. Inspect the cabin air filter first, then test the blower motor and check for debris in the ducts. Use a diagnostic tool to verify the IHKA module's operation.

What are the common symptoms of a failing HVAC compressor?

Common symptoms include insufficient cooling, unusual noises (e.g., grinding or squealing), refrigerant leaks, and the A/C clutch not engaging. If the compressor fails, replace it with a genuine BMW part to ensure compatibility and 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 Overview

Coming Soon

A detailed guide to the HVAC system in the 2005-2011 BMW 340i, including component locations and functions.

Refrigerant Handling and Safety

Coming Soon

Learn about proper refrigerant handling, safety precautions, and environmental regulations for R134a.

IHKA Control Module Reset Procedure

Coming Soon

Step-by-step instructions for resetting the IHKA control module using BMW diagnostic tools.

Cabin Air Filter Replacement Guide

Coming Soon

A visual guide to replacing the cabin air filter in the 2005-2011 BMW 340i.

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