Nissens 90988 Automatic Transmission Oil Cooler

Nissens 90988 Automatic Transmission Oil Cooler

The Nissens 90988 automatic transmission oil cooler is an aluminum replacement component built for BMW applications that require stable transmission fluid temperature control. It supports thermal management in vehicles such as the BMW 640i, 535i, and 750i, helping maintain consistent transmission operation under everyday driving and higher-load conditions.

Key Features

• Aluminum construction for efficient heat transfer and corrosion resistance
• Core dimensions: 8.4300 in. length, 4.37 in. width, and 3.1500 in. height
• 14-row core design for transmission fluid cooling performance
• 0.64 in. inlet and outlet diameters
• No gasket or seal included
• Direct replacement application for select BMW automatic transmission cooling systems

Detailed Product Overview

Nissens 90988 is an automatic transmission oil cooler engineered for select BMW models, including the 2015-2018 BMW 640i and 640i Gran Coupe, 2015-2017 BMW 535i GT and 535i GT xDrive, 2015-2016 BMW 535i and ActiveHybrid 5, and 2015 BMW 740i, 740Li, 750i, 750i xDrive, 750Li, 750Li xDrive, and ActiveHybrid 7. This part number, 90988, is built to match the cooling-system requirements of these vehicles with aluminum construction and compact core sizing for transmission fluid heat exchange. Nissens develops thermal management components with a focus on consistent manufacturing quality across its aftermarket range.

This part cross-references OE-style numbers such as 7572540 and 7638678 for the same application.

What It Helps Address

• Transmission fluid overheating
• Heat-related transmission performance issues
• Reduced cooling efficiency in the transmission circuit
• Replacement needs after cooler leakage or damage
• Service repair on BMW automatic transmission cooling systems

Installation Notes and Tips

Verify inlet and outlet sizing before installation and confirm the cooler matches the vehicle’s transmission cooling layout. Because no gasket or seal is included, reuse or replacement of sealing components should be planned separately as needed. Always inspect surrounding lines, fittings, and mounting points for wear or contamination during service.

Quality Assurance

Nissens positions this cooler within its Genuine Nissens Quality standard, reflecting the brand’s focus on thermal and engine-efficiency components for the aftermarket. Part number 90988 is manufactured as a quality replacement for select BMW automatic transmission applications.