CSF 3716 Radiator

OE-Style Cooling for BMW Applications

The CSF 3716 radiator is an OE-style replacement built with a 1-row aluminum core and plastic tanks for BMW cooling systems that use a cross-flow layout. It is engineered for direct-fit service on select BMW Z4, 135i, 135is, 335i, 335i xDrive, 335is, 1 Series M, and 335xi models.

CSF’s radiator line is developed from long-running manufacturing experience, with ISO/TSO-certified production and lab validation focused on cooling performance. The 3716 follows the original equipment style with quick-connect inlet and outlet pipe connections and includes the cooling circuit control sleeve specified for the application.

Key Features

• Part number: CSF 3716
• 1-row aluminum core with plastic tanks
• Cross-flow radiator design
• Core thickness: 1 1/4 in.
• Core size: 23 5/8 in. length x 13 5/8 in. width
• Inlet diameter: 1 1/2 in., left side
• Outlet diameter: 1 1/2 in., right side
• OE-style quick-connect inlet and outlet pipe design
• Supplied with cooling circuit control sleeve
• No radiator cap included

Detailed Description

The CSF 3716 radiator is built for BMW cooling systems that require an OE-style plastic tank and aluminum core construction. Its cross-flow layout, 1-row core, and quick-connect pipe connections match the factory-style configuration used on select BMW Z4 and 1 Series / 3 Series turbo applications. The design supports proper coolant routing and heat exchange while maintaining the original fitment profile for service replacement.

This part cross-references BMW 17 11 7 558 480 and CSF CU2973 for the same application. It is a practical choice for BMW 135i radiator replacement, BMW 335i radiator replacement, and BMW Z4 radiator replacement where the original cooling assembly uses the same OE-style layout. The CSF 3716 also aligns with the brand’s broader radiator line, which covers many vehicle applications and is built around validated cooling performance standards.

What This Radiator Helps Address

• Coolant leaks from aging plastic tank and core assemblies
• Reduced cooling efficiency from a worn or clogged radiator
• Overheating concerns caused by damaged internal passages
• Cracked inlet or outlet connections on the original radiator
• Service replacement needs for OE-style BMW cooling systems

Installation Notes and Tips

Verify inlet and outlet orientation before installation: inlet is left, outlet is right. Confirm the vehicle uses the OE-style quick-connect pipe arrangement and the included control sleeve specification. Because this radiator does not include a cap, reuse or replace the cap separately as needed based on the vehicle’s cooling system requirements.

Compatible With: 2009-2016 BMW Z4, N/A; 2008-2013 BMW 135i, N/A; 2013 BMW 135is, N/A; 2007-2013 BMW 335i, N/A; 2009-2013 BMW 335i xDrive, N/A; 2011-2013 BMW 335is, N/A; 2011 BMW 1 Series M, N/A; 2007-2008 BMW 335xi, N/A.

Quality Assurance

CSF manufactures radiators to high-performance standards using certified production processes and testing focused on cooling validation. The 3716 is built as an OE-style replacement for consistent fitment and dependable thermal management in the listed BMW applications.