Denso 471-1490 A/C Compressor

Overview of the Denso 471-1490 A/C Compressor

The Denso 471-1490 A/C compressor is engineered for reliable performance in select BMW models, including the 545i, 550i, 645Ci, and 650i. Designed to work with R134a refrigerant, this compressor ensures efficient air conditioning operation tailored to your vehicle's specifications.

• Compatible with BMW 545i, 550i, 645Ci, and 650i models
• Uses R134a refrigerant for optimal cooling
• Clutch maximum diameter of 110.0 mm for precise engagement
• Serpentine pulley belt type for smooth power transmission
• Bolt tangent mounting type for secure installation

Technical Details and Features

This A/C compressor from Denso features a clutch with a maximum diameter of 110.0 mm, designed to engage and disengage efficiently with the serpentine belt system found in the specified BMW models. The bolt tangent mounting type provides a stable and secure fit, minimizing vibration and ensuring consistent compressor operation. Compatible with R134a refrigerant, the unit meets the cooling requirements of the BMW 545i, 550i, 645Ci, and 650i, maintaining proper cabin temperature control.

Compatible BMW Models and Applications

The Denso 471-1490 A/C compressor is specifically compatible with the following BMW vehicles:

• BMW 545i
• BMW 550i
• BMW 645Ci
• BMW 650i

This compatibility ensures that the compressor integrates seamlessly with the factory HVAC system, providing reliable air conditioning performance.

Common Issues Addressed by This Compressor

• Loss of cooling efficiency in BMW 5 and 6 Series models
• Clutch slippage or failure causing intermittent A/C operation
• Noise or vibration from worn or damaged compressor components
• Leaks or refrigerant loss affecting system pressure
• Failure to engage the compressor clutch during A/C activation

Installation Notes and Tips

When installing the Denso 471-1490 A/C compressor, ensure the following:

• Use the correct bolt tangent mounting hardware to secure the compressor
• Verify the serpentine belt routing and tension for proper pulley operation
• Confirm the system is evacuated and recharged with R134a refrigerant according to manufacturer specifications
• Inspect related components such as the clutch coil and electrical connections for proper function

Quality Assurance and Warranty

Denso manufactures this A/C compressor to meet OEM standards for durability and performance. The part number 471-1490 undergoes rigorous quality control to ensure compatibility and reliability in BMW 545i, 550i, 645Ci, and 650i models. Warranty coverage details should be confirmed at the point of purchase, typically including protection against defects in materials and workmanship.