CSF 3891 Radiator

CSF 3891 Radiator for Nissan Altima

CSF 3891 is an OE-style radiator built with an aluminum core and plastic tanks for direct replacement service on select Nissan Altima applications. It features a cross-flow design, 1 1/4-inch core thickness, and integrated high-efficiency plate-type oil cooler construction for the listed fitments.

Key Features

• OE-style plastic tank and aluminum core construction
• Cross-flow radiator design
• 1 1/4-inch core thickness with single-row core layout
• Right-side 1 3/8-inch inlet and left-side 1 3/8-inch outlet
• Built for 2020-2024 Nissan Altima and 2019 Nissan Altima applications
• Part number 3891 for catalog and fitment verification

Detailed Description

CSF 3891 is engineered as a direct-fit radiator for Nissan Altima models listed in the fitment data, including 2019 and 2020-2024 vehicles. The radiator uses an aluminum core with plastic tanks in an OE-style layout, helping maintain factory-style routing and packaging. Core dimensions include 28 3/8 inches in length, 15 5/8 inches in width, and 1 1/4 inches in thickness, with a cross-flow configuration and a single core row. The unit also includes a high-efficiency plate-type oil cooler section and is designed with a right-side inlet and left-side outlet. If you are searching for a replacement radiator for a 2020-2024 Nissan Altima or a 2019 Nissan Altima, CSF 3891 provides the specified fitment and construction details needed for a direct replacement decision.

What This Radiator Helps Address

• Overheating caused by a restricted or leaking radiator
• Coolant loss from cracked tanks or damaged core seams
• Reduced cooling performance from age-related wear
• Transmission or fluid temperature management concerns on listed applications
• Fitment issues when replacing an OE-style Nissan Altima radiator

Installation Notes and Tips

Verify the inlet and outlet orientation, core dimensions, and oil cooler configuration before installation. This radiator is listed with no cap included, so reuse or source the correct cap separately if required by the vehicle setup. Confirm all hose connections, mounting points, and surrounding cooling-system components match the OE-style layout before final assembly. Fits 2020-2024 Nissan Altima, N/A. Fits 2019 Nissan Altima, N/A.

Quality Assurance

CSF states that its radiators are manufactured to high-performance standards, with production supported by ISO/TSO-certified factories and validation testing for cooling performance. The brand also notes long-term global supply experience across a wide range of radiator applications. This part cross-references Partslink NI3010249 for the same application.