Nissens 91378 Engine Oil Cooler

Nissens 91378 Engine Oil Cooler

The Nissens 91378 engine oil cooler is an aluminum thermal-management component built for direct-fit service on select Lexus and Toyota applications. It is specified for vehicles such as the Lexus RX350, RX350L, RX450h, Toyota Highlander, and Toyota Sienna, with 2022 applications noted as without housing.

• Aluminum construction for efficient heat transfer
• Core height: 3.1900
• Core width: 1.6100
• Core length: 4.25
• Engine oil cooler for thermal control in the lubrication system
• Compatible with select Lexus RX350 and Toyota Highlander applications

OE-Style Thermal Control

Nissens part number 91378 is engineered as an engine oil cooler for vehicles that rely on stable oil temperature to protect engine performance and lubrication quality. The aluminum core supports heat exchange in a compact package, making it a practical replacement for select Lexus RX350, Lexus RX350L, Lexus RX450h, Toyota Highlander, and Toyota Sienna models. This part cross-references OE numbers 157100P010 and 1571031060 for the same application.

Common Issues This Part Can Address

• Oil temperature running higher than normal
• Oil cooler leakage from age or corrosion
• Reduced cooling efficiency in the lubrication circuit
• Service replacement for a damaged or worn cooler assembly
• Fitment needs for Lexus RX350 and Toyota Highlander oil cooler service

Installation Notes and Tips

Verify the vehicle’s model year and configuration before installation. 2022 Lexus RX350, RX350L, RX450h, and 2022 Toyota Highlander applications are listed without housing. Confirm the existing cooler layout, mounting points, and OE reference numbers 157100P010 or 1571031060 before ordering. Professional installation is recommended to ensure proper sealing and system integrity.

Quality Assurance

Nissens develops thermal and engine-efficiency components for the aftermarket with a focus on consistent manufacturing quality. Part number 91378 is produced as a precision replacement oil cooler for the listed Lexus and Toyota applications.