Nissens 90623 Automatic Transmission Oil Cooler

Nissens 90623 Automatic Transmission Oil Cooler

The Nissens 90623 automatic transmission oil cooler is built with an aluminum core and integrated seal for direct replacement service in select BMW applications. It is engineered to help maintain transmission fluid temperature and support consistent automatic transmission operation in demanding driving conditions.

Key Features

• Aluminum construction for efficient heat transfer and corrosion resistance
• Core dimensions: 5.5900 in. length, 3.1500 in. height, and 2.0500 in. width
• 13-core row design
• 0.55 in. inlet and outlet diameters
• Gasket or seal included
• OE-style replacement for BMW 525i, 530i, 545i, 645Ci, 745i, and 745Li applications

Detailed Description

Nissens 90623 is an automatic transmission oil cooler made from aluminum and sized for the specified BMW fitments. Nissens develops thermal management components to high manufacturing standards, and this cooler reflects that focus with a compact core design, matched inlet and outlet sizing, and a seal included for service replacement. This part cross-references OE numbers 17217507974 and 17217519213 for the same application. It is a direct-fit solution for 2004-2005 BMW 525i, 530i, 545i, and 645Ci, as well as 2002-2005 BMW 745i and 745Li models.

What It Helps Address

• Transmission fluid temperature buildup during normal driving or stop-and-go traffic
• Reduced cooling efficiency from a leaking or restricted oil cooler
• Service replacement needs on BMW automatic transmission cooling systems
• Fluid seepage at the cooler connection points when the seal is worn

Installation Notes and Tips

Verify the part number and vehicle application before installation. Inspect the cooler lines, mounting points, and surrounding transmission cooling components for wear or contamination before fitting the new unit. Flush the transmission cooling circuit if the system shows signs of debris or fluid breakdown, and confirm all connections are properly seated after installation.

Quality Assurance

Nissens is a recognized manufacturer of thermal and engine efficiency components, and its products are developed and manufactured to consistent quality standards. The 90623 automatic transmission oil cooler is part of that OE-focused aftermarket range.

• Fits 2004-2005 BMW 525i
• Fits 2004-2005 BMW 530i
• Fits 2004-2005 BMW 545i
• Fits 2004-2005 BMW 645Ci
• Fits 2002-2005 BMW 745i
• Fits 2002-2005 BMW 745Li