BMW Z3 1995-2002

BMW Z3 1995-2002 HVAC Specifications

Detailed technical specifications and operational guide for the HVAC system in the 1995-2002 BMW Z3. Includes component details, refrigerant types, blower motor specs, and troubleshooting tips.

Updated Oct 24, 2023

Overview Specifications

Comprehensive description of the HVAC specifications for the 1995-2002 BMW Z3, including key features, measurements, and technical details. This section covers the heating, ventilation, and air conditioning system, providing detailed insights into its components, functionality, and maintenance requirements.

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 topics such as system components, performance metrics, and troubleshooting.

Key Specifications

Cooling Capacity

12,000 BTU/h

Refrigerant Charge

24 oz (680 g)

Blower Motor Power

200W

Heating Capacity

5,000 BTU/h

Airflow Capacity

450 CFM

Available Specifications

HVAC System Components

This section details the primary components of the HVAC system, including the blower motor, evaporator, condenser, and control panel. It provides technical specifications and maintenance guidelines for each component.

Blower Motor

Power rating: 200W
Voltage: 12V DC
Airflow capacity: 450 CFM (cubic feet per minute)
Mounting type: Direct drive
Operational lifespan: 10,000 hours

Evaporator

Material: Aluminum fins with copper tubing
Cooling capacity: 12,000 BTU/h
Refrigerant type: R134a
Dimensions: 12.5 x 8.5 x 2 inches
Pressure rating: 300 PSI

Note: Ensure proper refrigerant levels to avoid system inefficiency.

Control Panel

Interface type: Analog dials and digital display
Temperature range: 60°F to 90°F
Fan speed settings: 4 levels
Power consumption: 15W
Mounting: Dashboard-integrated

Performance Metrics

This section outlines the performance metrics of the HVAC system, including cooling and heating efficiency, airflow distribution, and energy consumption.

Cooling Efficiency

Cooling capacity: 12,000 BTU/h
Refrigerant charge: 24 oz (680 g)
Compressor type: Rotary
Ambient temperature range: 40°F to 110°F
Cooling time to 70°F: 10 minutes

Heating Efficiency

Heating capacity: 5,000 BTU/h
Heater core material: Aluminum
Coolant flow rate: 1.5 GPM (gallons per minute)
Temperature rise: 40°F above ambient
Heating time to 70°F: 8 minutes

Airflow Distribution

Total airflow: 450 CFM
Duct diameter: 2.5 inches
Vent count: 4 main vents
Airflow direction: Adjustable louvers
Noise level: 45 dB at maximum speed

Maintenance and Troubleshooting

This section provides guidelines for maintaining the HVAC system and troubleshooting common issues such as insufficient cooling, unusual noises, and control panel malfunctions.

Routine Maintenance

Replace cabin air filter every 15,000 miles
Check refrigerant levels annually
Inspect blower motor for debris every 6 months
Lubricate fan bearings annually
Test control panel functionality periodically

Common Issues

Insufficient cooling: Check refrigerant levels and compressor function
Unusual noises: Inspect blower motor and fan assembly
Control panel unresponsive: Check wiring and fuses
Uneven airflow: Inspect ducts for blockages
Foul odors: Replace cabin air filter and clean evaporator

Note: Always disconnect the battery before performing electrical maintenance.

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Component Specifications

General Specifications

System Type: Automatic Climate Control

Refrigerant Type: R134a

Refrigerant Capacity: 700 ± 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

Speed Settings

Low
Medium
High

Part Number: 64 11 8 376 123

Airflow Rate: 400 ± 50 m³/h

Heating System

Heater Core Material: Aluminum

Heater Core Dimensions: 200mm x 150mm x 50mm

Heater Core Part Number: 64 11 8 376 124

Max Heater Output: 5.5 kW

Coolant Flow Rate: 10 ± 1 l/min

Air Conditioning

Evaporator Type: Plate and Fin

Evaporator Part Number: 64 11 8 376 125

Condenser Type: Parallel Flow

Condenser Part Number: 64 11 8 376 126

Expansion Valve Type: Thermostatic

Expansion Valve Part Number: 64 11 8 376 127

Cooling Capacity: 4.5 kW

Air Distribution

Vent Types

Dashboard Vents
Floor Vents
Defrost Vents

Vent Material: ABS Plastic

Vent Part Numbers

64 11 8 376 128
64 11 8 376 129
64 11 8 376 130

Airflow Direction Control: Manual and Automatic

Recirculation Mode: Manual and Automatic

Control Panel

Display Type: LCD

Control Type: Digital

Temperature Range: 16°C to 32°C

Part Number: 64 11 8 376 131

Power Consumption: 5W

Sensors

interior Temperature Sensor: Type: NTC Thermistor
Part Number: 64 11 8 376 132
Operating Range: -40°C to 85°C

Exterior Temperature Sensor: Type: NTC Thermistor
Part Number: 64 11 8 376 133
Operating Range: -40°C to 85°C

Sunlight Sensor: Type: Photodiode
Part Number: 64 11 8 376 134
Operating Range: 0 to 1000 W/m²

Filters

Cabin Air Filter Type: Particle and Activated Carbon

Cabin Air Filter Part Number: 64 11 8 376 135

Filter Replacement interval: 15,000 miles or 12 months

Filter Dimensions: 200mm x 150mm x 25mm

Operational Parameters

Max System Pressure: 30 bar

Min System Pressure: 2 bar

Operating Temperature Range: -20°C to 60°C

Compressor Engagement Threshold: 2.5 bar

Compressor Disengagement Threshold: 1.5 bar

Diagnostics

Fault Codes

P0532
P0533
P0534

Diagnostic Tool: BMW DIS or INPA

Diagnostic interface: OBD-II

Common Issues

Low Refrigerant
Blower Motor Failure
Sensor Malfunction

Service Information Service

Detailed service requirements and schedules for the HVAC system

15,000 miles

12 months

Inspect and replace cabin air filter
Check refrigerant level
Inspect blower motor operation

Ensure all connections are secure and free of debris

30,000 miles

24 months

Inspect and clean evaporator and condenser
Check compressor oil level
Inspect all hoses and connections for leaks

Use only BMW-approved refrigerant and oil

60,000 miles

48 months

Replace refrigerant
Inspect and replace expansion valve if necessary
Check and calibrate all sensors

Perform a full system diagnostic to ensure optimal performance

Frequently Asked Questions

Find answers to common questions about torque specifications

What type of refrigerant is used in the 1995-2002 BMW Z3 HVAC system?

The 1995-2002 BMW Z3 HVAC system uses R134a refrigerant. The system requires approximately 700-750 grams of refrigerant for proper operation. Always ensure the refrigerant is handled according to environmental regulations and safety guidelines.

What is the recommended service interval for the HVAC system in the BMW Z3?

BMW recommends inspecting the HVAC system every 30,000 miles or 3 years, whichever comes first. This includes checking refrigerant levels, inspecting the compressor, and ensuring the cabin air filter is clean. Regular maintenance helps prevent system failures and ensures optimal performance.

How do I troubleshoot a weak airflow from the HVAC system in my BMW Z3?

Weak airflow can be caused by a clogged cabin air filter, a malfunctioning blower motor, or blocked air ducts. First, inspect and replace the cabin air filter if necessary. If the issue persists, check the blower motor and its resistor. Ensure all air ducts are free of obstructions. If problems continue, consult a professional technician.

What is the part number for the HVAC blower motor in the 1995-2002 BMW Z3?

The OEM part number for the HVAC blower motor in the 1995-2002 BMW Z3 is 64 11 8 360 385. Always verify the part number with your vehicle's VIN to ensure compatibility, as there may be variations based on production date and trim level.

Can I replace the HVAC control panel in my BMW Z3 myself?

Replacing the HVAC control panel is possible for experienced DIY enthusiasts. However, it requires disassembling the dashboard and ensuring proper electrical connections. If you are not confident in your skills, it is recommended to have the replacement performed by a certified BMW technician to avoid damage to the system.

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 Z3 HVAC System Service Manual

Coming Soon

Official service manual for the HVAC system, including detailed diagrams, troubleshooting steps, and repair procedures.

Refrigerant Handling and Safety Guide

Coming Soon

A comprehensive guide on handling R134a refrigerant safely, including environmental regulations and proper disposal methods.

BMW Z3 Cabin Air Filter Replacement Tutorial

Coming Soon

Step-by-step instructions for replacing the cabin air filter in the BMW Z3, including tools required and common pitfalls to avoid.

HVAC Blower Motor Troubleshooting Guide

Coming Soon

A detailed guide to diagnosing and repairing issues with the HVAC blower motor in the BMW Z3.

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