Nissens 91298 Automatic Transmission Oil Cooler

Nissens 91298 Automatic Transmission Oil Cooler

The Nissens 91298 automatic transmission oil cooler is a direct-fit heat exchanger for BMW applications that need stable transmission fluid temperatures. Built with an aluminum core and supplied with a gasket or seal, it supports reliable oil cooling for consistent operation in the transmission system.

Key Features

• Aluminum construction for efficient heat transfer
• Conventional cooler design
• Core dimensions: 10.07 in. length, 4.41 in. width, 6.22 in. thickness
• 31-row core design
• Inlet diameter: 0.64 in.; outlet diameter: 0.55 in.
• Gasket or seal included
• Housing not included

Detailed Description

Nissens transmission oil coolers are engineered to help maintain proper fluid temperature in automatic transmissions, reducing thermal stress on lubricated components. Part number 91298 uses an aluminum core and a conventional layout to promote dependable heat exchange in BMW 320i, BMW 328i, BMW 428i, BMW 435i, BMW M235i, and related applications. This part cross-references Monroe Shocks & Struts (e.g., 172243) for the same application.

Compatible With: Fits 2015-2018 BMW 320i, N/A; Fits 2015-2018 BMW 320i xDrive, N/A; Fits 2015-2016 BMW 228i, N/A; Fits 2015-2016 BMW 228i xDrive, N/A; Fits 2015-2016 BMW 328i, N/A; Fits 2015-2016 BMW 328i GT xDrive, N/A; Fits 2015-2016 BMW 328i xDrive, N/A; Fits 2015-2016 BMW 335i GT xDrive, N/A; Fits 2015-2016 BMW 428i, N/A; Fits 2015-2016 BMW 428i Gran Coupe, N/A; Fits 2015-2016 BMW 428i xDrive, N/A; Fits 2015-2016 BMW 428i xDrive Gran Coupe, N/A; Fits 2015-2016 BMW 435i, N/A, M Sport Package; Fits 2015-2016 BMW 435i xDrive, N/A, M Sport Package; Fits 2015-2016 BMW M235i, N/A; Fits 2015-2016 BMW M235i xDrive, N/A; Fits 2015 BMW 335i, N/A, M Sport Package; Fits 2015 BMW 335i xDrive, N/A, M Sport Package.

What It Helps Address

• Excess transmission fluid temperature
• Heat-related fluid breakdown
• Reduced cooling efficiency in the transmission circuit
• Fluid leakage at the cooler seal interface
• Replacement needs for a worn or damaged BMW transmission oil cooler

Installation Notes and Tips

Verify the vehicle’s transmission cooler layout, inlet and outlet sizes, and housing configuration before installation. This unit is listed without housing, so reuse or replacement of the surrounding assembly should be confirmed during service. Always inspect the gasket or seal surface, flush the cooling circuit as needed, and confirm proper fluid level after installation.

Quality Assurance

Nissens backs this transmission oil cooler with in-house testing processes that verify compliance with quality standards and support long service life. Part number 91298 is built for dependable cooling performance in BMW automatic transmission applications.