BMW 340i 2019-present

BMW 340i 2019-present HVAC Specifications

Detailed technical specifications for the HVAC system in the 2019-Present BMW 340i, including system components, performance metrics, and diagnostic procedures.

Updated Oct 24, 2023

Overview Specifications

Comprehensive description of the HVAC specifications for the 2019-Present BMW 340i, 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 'refrigerant capacity', 'blower motor', or 'temperature control'.

Navigate through the HVAC documentation sections using the table of contents or by scrolling through the major sections and subsections listed below.

Key Specifications

Refrigerant Capacity

500 g (1.1 lbs)

Heating Output

5.5 kW (18,770 BTU/h)

Cooling Capacity

7.2 kW (24,570 BTU/h)

Airflow Capacity

600 CFM

Filter Efficiency

99.97% for PM2.5

Available Specifications

Climate Control System

Details about the automatic climate control system, including its components, functionality, and technical specifications.

Automatic Temperature Control

Dual-zone automatic climate control system
Temperature range: 60°F to 84°F (15.5°C to 29°C)
Integrated humidity and air quality sensors
Automatic air recirculation mode
Precision control with 0.5°F (0.3°C) increments

Air Distribution System

Multi-zone air distribution with 8 adjustable vents
Airflow capacity: 600 CFM (cubic feet per minute)
Dual blower motors for independent zone control
Automatic defrost and demist functions
Rear-seat ventilation ducts

Note: The air distribution system is designed to ensure even airflow across all seating positions.

Heating System

Technical details about the heating components, including the heater core, coolant flow, and performance specifications.

Heater Core Specifications

High-efficiency aluminum heater core
Heat output: 5.5 kW (18,770 BTU/h)
Coolant flow rate: 12 L/min (3.17 gal/min)
Integrated thermal management system
Rapid warm-up time: 3 minutes to reach 140°F (60°C)

Auxiliary Heating

Electric auxiliary heater with 1.5 kW output
Activation temperature: below 32°F (0°C)
Energy-efficient PTC (Positive Temperature Coefficient) technology
Integrated with the engine cooling system
Automatic deactivation above 50°F (10°C)

Note: The auxiliary heating system ensures quick cabin warm-up in cold conditions.

Air Conditioning System

Comprehensive details about the air conditioning system, including refrigerant type, compressor specifications, and cooling performance.

Refrigerant System

Refrigerant type: R1234yf (low global warming potential)
Refrigerant capacity: 500 g (1.1 lbs)
Operating pressure: 25 bar (362.6 psi)
Integrated refrigerant pressure sensor
Environmentally compliant with EU regulations

Compressor Specifications

Variable displacement compressor
Cooling capacity: 7.2 kW (24,570 BTU/h)
Maximum RPM: 8,000
Electronically controlled clutch system
Energy-efficient operation with reduced engine load

Note: The variable displacement compressor adjusts cooling output based on demand, improving efficiency.

Ventilation and Air Quality

Details about the ventilation system, air filtration, and cabin air quality management.

Air Filtration System

Dual-layer microfilter with activated carbon
Particle filtration efficiency: 99.97% for PM2.5
Filter replacement interval: 15,000 miles (24,000 km)
Integrated pollen and allergen filter
Automatic filter monitoring system

Cabin Air Quality Management

Ionizer for air purification
Automatic air recirculation during high pollution
CO2 sensor for fresh air intake control
Odor-neutralizing activated carbon filter
Real-time air quality display on iDrive system

Note: The ionizer helps reduce airborne bacteria and viruses, enhancing cabin air quality.

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: R1234yf

Refrigerant Capacity: 525 ± 25 g

Compressor Type: Variable Displacement

Airflow Capacity: Up to 12 m³/min

Heating System

Heater Core Material: Aluminum

Heater Core Flow Rate: 5.5 L/min

Maximum Heating Output: 7.5 kW

Temperature Range: 15°C to 38°C

Part Number: 64119283745

Cooling System

Evaporator Material: Aluminum

Evaporator Flow Rate: 4.8 L/min

Maximum Cooling Output: 5.2 kW

Temperature Range: 16°C to 10°C

Part Number: 64119283746

Blower Motor

Type: Brushless DC Motor

Power Rating: 150 W

Speed Range: 0 to 12,000 RPM

Part Number: 64119283747

Operational Lifetime: 10,000 hours

Air Distribution

Vent Types

Dashboard Vents
Footwell Vents
Defrost Vents

Airflow Direction Control: Automatic and Manual

Airflow Distribution Modes

Face
Foot
Defrost
Combination

Maximum Airflow Pressure: 2.5 kPa

Filters

Cabin Air Filter Type: Combination Particle and Activated Carbon Filter

Filter Efficiency: 99% for particles > 0.3 µm

Replacement interval: 15,000 miles or 12 months

Part Number: 64119283748

Sensors

interior Temperature Sensor: Type: NTC Thermistor
Accuracy: ±0.5°C
Range: -40°C to 85°C
Part Number: 64119283749

Sunlight Sensor: Type: Photodiode Array
Range: 0 to 100,000 Lux
Part Number: 64119283750

Humidity Sensor: Type: Capacitive
Accuracy: ±3% RH
Range: 0 to 100% RH
Part Number: 64119283751

Control Unit

Type: Integrated Climate Control Module

Operating Voltage: 12 V DC

Communication Protocol: CAN Bus

Part Number: 64119283752

Software Version: v2.3.1

Diagnostics

Fault Codes

B1234
B1235
B1236

Diagnostic Tool: BMW ISTA

Self Diagnosis interval: Every 500 miles

Error Log Capacity: 50 entries

Safety Features

Overheat Protection: Automatic Shutdown at 120°C

Refrigerant Leak Detection: Integrated Sensor

Emergency Shutdown: In Case of Electrical Fault

Service Information Service

Detailed service requirements and schedules for the HVAC system

15,000

Replace cabin air filter
Check refrigerant level
Inspect blower motor operation

Use only BMW-approved refrigerant and filters

30,000

Inspect HVAC system for leaks
Test all sensors for accuracy
Check compressor operation

Perform system recalibration if necessary

60,000

Replace refrigerant
Inspect and clean evaporator and heater core
Check all electrical connections

Ensure all components are within manufacturer specifications

Frequently Asked Questions

Find answers to common questions about torque specifications

What is the refrigerant type and capacity for the 2019-Present BMW 340i HVAC system?

The HVAC system in the 2019-Present BMW 340i uses R1234yf refrigerant, with a total system capacity of approximately 525 grams (± 25 grams). This refrigerant is environmentally friendly and complies with current regulations.

How does the automatic climate control system work in the BMW 340i?

The automatic climate control system in the BMW 340i uses multiple sensors, including interior temperature, exterior temperature, and solar sensors, to maintain the desired cabin temperature. It adjusts airflow, temperature, and fan speed automatically based on user settings and environmental conditions.

What is the recommended maintenance interval for the HVAC system?

BMW recommends inspecting the HVAC system every 20,000 miles or 24 months, whichever comes first. This includes checking refrigerant levels, cabin air filters, and system performance. Regular maintenance ensures optimal efficiency and prevents potential issues.

How do I replace the cabin air filter in the BMW 340i?

The cabin air filter in the BMW 340i is located behind the glove compartment. To replace it, remove the glove compartment, unclip the filter housing, and replace the old filter with a genuine BMW part (part number 64 31 9 388 365). Ensure the filter is installed with the airflow arrow pointing downward.

What are the common symptoms of a failing HVAC compressor?

Common symptoms of a failing HVAC compressor include reduced cooling performance, unusual noises (such as grinding or squealing), and visible refrigerant leaks. If any of these symptoms occur, it is recommended to have the system inspected by a certified BMW technician.

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 technical overview of the HVAC system in the 2019-Present BMW 340i, including component locations and system operation.

Refrigerant Handling and Safety Guidelines

Coming Soon

Comprehensive guide on handling R1234yf refrigerant safely, including proper storage, disposal, and safety precautions.

Cabin Air Filter Replacement Guide

Coming Soon

Step-by-step instructions for replacing the cabin air filter in the BMW 340i, including tools required and safety tips.

BMW HVAC Diagnostic Codes

Coming Soon

List of common diagnostic trouble codes (DTCs) related to the HVAC system and their potential causes.

About the Author

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