Nissens 890634 A/C Compressor

Nissens 890634 A/C Compressor Overview

The Nissens 890634 is a first-fit A/C compressor built for Mercedes-Benz HVAC systems that use R134A refrigerant and PAG 46 oil. It is a direct replacement for a wide range of Mercedes-Benz models, including G-Class, ML-Class, E-Class, S-Class, and SLK applications.

With pre-filled PAG oil and a 7SEU16C compressor design, this unit is built for efficient service replacement on vehicles that require a specific-fit compressor. Nissens 890634 is a practical choice when replacing a worn Mercedes-Benz A/C compressor on 2000-2012 applications.

Key Features

• Part number: 890634
• A/C compressor for HVAC systems using R134A refrigerant
• Compatible with PAG 46 refrigerant oil
• 7SEU16C compressor type
• 6-groove pulley design
• Pre-filled with PAG oil
• First-fit design for faster installation
• Fits a broad range of Mercedes-Benz models from 2000-2012

Detailed Description

Nissens develops thermal management components with a focus on OE-style fit and consistent manufacturing quality. The 890634 A/C compressor is engineered for Mercedes-Benz vehicles that require R134A refrigerant and PAG 46 oil, making it a direct service replacement for many popular luxury SUV and sedan platforms. This compressor cross-references Valeo 813137 and Delphi CS20084 for the same application.

Compatible vehicle coverage includes Fits 2009-2012 Mercedes-Benz G550, N/A; Fits 2009-2012 Mercedes-Benz GL450, N/A; Fits 2009-2012 Mercedes-Benz GL550, N/A; Fits 2003-2011 Mercedes-Benz G55 AMG, N/A; Fits 2006-2009 Mercedes-Benz E350, N/A; Fits 2007-2009 Mercedes-Benz E550, N/A; Fits 2000-2006 Mercedes-Benz S500, N/A; and Fits 2005-2011 Mercedes-Benz SLK350, N/A. Additional coverage extends across many other Mercedes-Benz chassis listed in the fitment data.

Common Replacement Reasons

• Loss of cabin cooling performance
• Noisy or seized compressor operation
• Refrigerant system pressure issues
• Compressor failure on Mercedes-Benz R134A systems
• Service replacement for worn OE-style A/C components

Installation Notes and Tips

Verify refrigerant type, pulley groove count, and compressor type before installation. This compressor is pre-filled with shipping oil only in certain listed applications, so drain and refill as required by the vehicle note and service procedure. Confirm the vehicle VIN breakpoints and auxiliary A/C notes where listed, especially on ML63 AMG, CL63 AMG, S63 AMG, and other chassis-specific applications. Always replace O-rings and follow the correct evacuation and recharge procedure for Mercedes-Benz A/C service.

Quality Assurance

Nissens positions this compressor within its Genuine Nissens Quality standard, reflecting the brand’s focus on manufactured thermal components for the aftermarket. Part number 890634 is built for specific-fit Mercedes-Benz applications and follows the refrigerant and oil requirements listed above.