BMW X3 2017-2021

BMW X3 2017-2021 HVAC Specifications

Detailed technical specifications and repair information for the HVAC system in the 2017-2021 BMW X3. Includes component details, refrigerant specifications, and diagnostic procedures.

Updated Oct 24, 2023

Overview Specifications

Comprehensive description of the HVAC specifications for the 2017-2021 BMW X3, 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'.

Navigate through the HVAC documentation sections using the table of contents or by scrolling through the document. Each major section is clearly labeled for easy access.

Key Specifications

Refrigerant Capacity

500 grams

Heater Core Capacity

1.2 liters

Cooling Capacity

5.0 kW

Air Filter Replacement Interval

15,000 miles or 12 months

Temperature Range

60°F to 84°F (15.5°C to 29°C)

Available Specifications

Climate Control System

This section covers the advanced climate control system, including automatic temperature regulation, air distribution, and system components.

Automatic Climate Control

Dual-zone automatic climate control system
Temperature range: 60°F to 84°F (15.5°C to 29°C)
Includes humidity and air quality sensors
Automatic air recirculation mode
Microfilter for dust and pollen filtration

Air Distribution

Multi-level air vents for precise airflow control
Adjustable center and side vents
Rear seat ventilation with independent controls
Defrost and defog settings for windshield and side windows

Note: The air distribution system is designed to maintain consistent cabin temperature and reduce fogging.

Heating System

Details on the heating system, including the heater core, coolant flow, and temperature regulation.

Heater Core Specifications

Heater core capacity: 1.2 liters
Coolant flow rate: 12 liters per minute
Maximum heat output: 6.5 kW
Integrated temperature control valve

Heating Performance

Rapid cabin heating within 5 minutes at -20°C
Adjustable seat heating with 3 levels
Steering wheel heating option
Rear seat heating available in higher trims

Note: The heating system is optimized for quick warm-up in cold climates.

Air Conditioning System

Technical details of the air conditioning system, including refrigerant type, compressor specifications, and cooling performance.

Refrigerant and Compressor

Refrigerant type: R1234yf
Refrigerant capacity: 500 grams
Variable displacement compressor
Compressor power consumption: 400W

Cooling Performance

Maximum cooling capacity: 5.0 kW
Cabin temperature reduction to 20°C within 10 minutes at 35°C ambient
Eco Pro mode for reduced energy consumption
Automatic recirculation during high outside temperatures

Note: The system is designed for efficient cooling with minimal energy usage.

Ventilation and Air Quality

Information on the ventilation system, air filtration, and cabin air quality management.

Air Filtration System

Dual-layer microfilter with activated carbon
Filter replacement interval: 15,000 miles or 12 months
Removes up to 99% of airborne particles
Integrated ionizer for air purification

Ventilation Modes

Fresh air and recirculation modes
Automatic mode based on air quality sensors
Rear seat ventilation with adjustable speed
Defogging mode with optimized airflow

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

Search Specifications

Search by specification name, value, or description

Component Specifications

General Specifications

System Type: Automatic Climate Control

Refrigerant Type: R1234yf

Refrigerant Capacity: 500 ± 20 g

Compressor Type: Variable Displacement

Blower Motor Type: Electronically Controlled

Air Filter Type: Cabin Microfilter with Activated Carbon

Temperature Control

Temperature Range: 16°C to 28°C

Temperature Resolution: 0.5°C

Temperature Sensor Accuracy: ±1°C

Auto Mode Response Time: 5-10 seconds

Airflow Specifications

Blower Motor Power: 200 W

Max Airflow Rate: 600 m³/h

Airflow Direction Control

Face
Footwell
Defrost
Combination

Air Distribution Zones

Driver
Front Passenger
Rear Passengers

Heating System

Heater Core Type: Aluminum

Heater Core Capacity: 5.5 kW

Max Heating Temperature: 60°C

Heater Control Valve Type: Electronically Controlled

Cooling System

Evaporator Type: Aluminum

Evaporator Capacity: 3.5 kW

Condenser Type: Parallel Flow

Condenser Capacity: 4.2 kW

Compressor Oil Type: PAG 46

Compressor Oil Capacity: 150 ± 10 ml

Air Quality System

Cabin Filter Part Number: 64 31 9 388 844

Filter Replacement interval: 15,000 miles or 12 months

Ionizer Present: true

Activated Carbon Filter: true

Air Quality Sensor Type: Particulate Matter and VOC Sensor

Operational Parameters

System Voltage: 12 V DC

Max Current Draw: 15 A

Operating Temperature Range: -30°C to 60°C

Humidity Tolerance: 5% to 95% RH

System Pressure Limits: Low Pressure Side: 1.5 to 3.5 bar
High Pressure Side: 10 to 25 bar

Diagnostic Specifications

Diagnostic interface: OBD-II

Fault Code Storage: Up to 50 codes

Self Diagnosis Capability: true

Common Fault Codes

B1234
B1235
B1236

Diagnostic Tool Requirements: BMW ISTA or compatible

Maintenance Specifications

Refrigerant Recharge interval: Every 2 years or 30,000 miles

Compressor Belt Tension: 500 ± 50 N

Blower Motor Lubrication: Not required

System Leak Test interval: Every 2 years or 30,000 miles

Cabin Filter Replacement Interval: 15,000 miles or 12 months

Safety information

Refrigerant Handling: Use only R1234yf certified equipment

High Pressure Warning: Do not exceed 25 bar

Electrical Safety: Disconnect battery before servicing

Fire Hazard: Avoid open flames near refrigerant

Service Information Service

Detailed service requirements and schedules for the HVAC system

15,000

Replace cabin air filter
Check refrigerant level
Inspect compressor belt tension

Follow BMW service guidelines for accurate maintenance

30,000

Recharge refrigerant
Perform system leak test
Inspect blower motor operation

Use only BMW-approved refrigerant and equipment

Frequently Asked Questions

Find answers to common questions about torque specifications

What is the refrigerant type and capacity for the 2017-2021 BMW X3 HVAC system?

The 2017-2021 BMW X3 HVAC system uses R-1234yf refrigerant. The total system capacity is approximately 525 grams (18.5 ounces). Always refer to the vehicle's under-hood label for exact specifications.

How do I reset the HVAC system in my BMW X3?

To reset the HVAC system, turn the ignition to the ON position without starting the engine. Set the temperature to maximum heat, then press and hold the AC button for 10 seconds. The system will reset, and the AC light will flash to confirm. This procedure may vary slightly depending on the trim level.

What is the recommended maintenance interval for the cabin air filter in the BMW X3?

The cabin air filter in the 2017-2021 BMW X3 should be inspected every 15,000 miles and replaced every 30,000 miles or as needed, depending on driving conditions. A clogged filter can reduce HVAC efficiency and air quality.

How does the automatic climate control system work in the BMW X3?

The automatic climate control system in the BMW X3 uses sensors to monitor cabin temperature, sunlight, and humidity. It adjusts fan speed, air distribution, and temperature automatically to maintain the desired comfort level. The system also includes a microfilter to improve air quality.

What is the purpose of the auxiliary electric heater in the BMW X3 HVAC system?

The auxiliary electric heater in the BMW X3 provides additional heating during cold starts or when the engine is not producing sufficient heat. It ensures faster cabin warming and improves comfort in low-temperature conditions.

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 X3 HVAC System Overview

Coming Soon

Detailed technical overview of the HVAC system, including components, operation, and specifications for the 2017-2021 BMW X3.

Cabin Air Filter Replacement Guide

Coming Soon

Step-by-step instructions for replacing the cabin air filter in the 2017-2021 BMW X3, including tools required and safety precautions.

Refrigerant Handling and Safety

Coming Soon

Guidelines for safely handling R-1234yf refrigerant, including equipment requirements, environmental considerations, and safety warnings.

Automatic Climate Control Troubleshooting

Coming Soon

Common issues and troubleshooting steps for the automatic climate control system in the 2017-2021 BMW X3.

About the Author

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