CSF 3723 Radiator

CSF 3723 Radiator for BMW SULEV Applications

CSF 3723 is an OE-style radiator built with an aluminum core and plastic tanks for select BMW SULEV applications. It is engineered for cross-flow cooling performance and uses quick-connect inlet and outlet pipe connections for a factory-style fit.

Key Features

• Aluminum core with plastic tanks
• Cross-flow radiator design
• Core thickness: 1 1/4 in.
• Core dimensions: 23 5/8 in. length x 13 5/8 in. width
• 1 1/2 in. left inlet and 1 1/2 in. right outlet
• Single-row core construction
• OE-style quick-connect inlet and outlet pipe
• No radiator cap included

Detailed Description

CSF part number 3723 is designed for BMW 328i and BMW 428i models equipped with SULEV. It follows an OE-style layout with plastic end tanks and an aluminum cooling core, matching the factory cross-flow configuration used in these applications. CSF manufactures radiators to high-performance standards and validates cooling performance through laboratory wind tunnel testing. This radiator is a direct-fit cooling replacement for 2012-2016 BMW 328i, N/A, w/ SULEV and 2014-2016 BMW 428i, N/A, w/ SULEV.

This part cross-references BMW 17117618808 and 17118672106 for the same application.

What It Helps Address

• Coolant leaks from a cracked or aging radiator tank
• Restricted coolant flow caused by internal radiator wear
• Overheating from reduced heat transfer efficiency
• Factory-style replacement needs on BMW SULEV cooling systems
• Fitment issues when replacing a damaged OE radiator

Installation Notes and Tips

Verify SULEV fitment before ordering, since this radiator is specific to those BMW applications. Confirm inlet and outlet orientation, as the inlet is on the left and the outlet is on the right. Inspect hoses, clamps, and quick-connect fittings during installation to ensure a secure seal. Part number 3723 is built to OE-style dimensions, which helps support a straightforward replacement process on the listed BMW 328i and BMW 428i models.

Quality Assurance

CSF radiators are manufactured in ISO/TSO-certified facilities and are engineered for cooling performance validation. The brand has supplied radiators worldwide for decades and produces a broad range of applications for leading vehicle platforms.