Nissens 891643 A/C Compressor

Nissens A/C Compressor for Subaru Impreza, Legacy, Outback

The Nissens 891643 A/C compressor is built to OE standards for Subaru cooling systems that need stable refrigerant flow and consistent cabin air conditioning. It is a direct-fit replacement for 2005-2009 Subaru Impreza, Legacy, and Outback applications with R134A refrigerant and a serpentine belt drive.

Key Features

• OE-standard compressor construction from Nissens
• Designed for R134A refrigerant systems
• Pre-filled with shipping oil only; drain and refill before installation
• Compatible with PAG 46 refrigerant oil
• Includes clutch, pulley, hub, bearing, and wobble plate design elements for controlled operation
• 4-groove pulley with serpentine belt type
• 12-volt electrical system with 2-pin connector
• O-rings included; 2 O-ring sealing points specified
• Compressor type SCSA08C

Detailed Description

Nissens part number 891643 is an A/C compressor engineered for 2005-2009 Subaru Impreza, 2005-2009 Subaru Legacy, and 2005-2009 Subaru Outback models. It is built to OE-level specifications and uses a compressor design focused on pumping efficiency, low noise, reduced vibration, and long service life under demanding operating conditions. This unit is configured for R134A systems, uses PAG 46 oil, and features a 4-groove serpentine pulley with clutch included for straightforward replacement service. This part cross-references UAC CO11036C for the same application.

What This Compressor Helps Address

• Weak or inconsistent cabin cooling
• Noisy compressor operation from worn internal components
• Loss of refrigerant circulation in the A/C system
• Compressor clutch or pulley-related A/C engagement problems
• Restoration of proper A/C function on Subaru Impreza, Legacy, and Outback vehicles

Installation Notes and Tips

Fits 2005-2009 Subaru Impreza, N/A. Fits 2005-2009 Subaru Legacy, N/A. Fits 2005-2009 Subaru Outback, N/A. Before installation, drain the shipping oil and refill the compressor with the correct PAG 46 oil amount for the vehicle system. Verify refrigerant type, connector style, pulley alignment, and O-ring sealing surfaces before charging the system. Replace any contaminated or damaged A/C components as needed and evacuate the system before recharging.

Quality Assurance

Nissens manufactures this compressor to OE standards and validates it for high-stress operating conditions. The compressor design emphasizes durable critical components and stable performance for Subaru A/C service.