CSF 2526 Radiator

OE-Style BMW Cooling Replacement

This CSF radiator is built for BMW E36 applications that need a direct-fit cooling replacement with OE-style plastic tanks and an aluminum core. It is engineered for the 1992-1999 BMW 325i, 325is, 323i, 328i, 328is, and M3, with cross-flow construction and left inlet/right outlet routing.

Part number 2526 is designed around factory-style dimensions and connections for a clean fit in supported BMW 3 Series and M3 applications. The 1-row aluminum core and reinforced tank design help maintain stable coolant flow in demanding street use.

Key Features

• CSF radiator, part number 2526
• OE-style plastic tanks with aluminum core
• 1-row cross-flow design
• Core thickness: 1 1/4 in.
• Core width: 17 1/4 in.; core length: 21 11/16 in.
• Inlet diameter: 1 5/8 in. left
• Outlet diameter: 1 5/8 in. right
• Steel crimp strips used to strengthen the radiator assembly
• No radiator cap included

Product Details

CSF manufactures this radiator to OE-style specifications for BMW cooling system service. The aluminum core is paired with plastic tanks to match the factory layout, while the cross-flow configuration supports efficient coolant movement through the core. CSF states its radiators are engineered to high-performance standards and validated through wind-tunnel testing, with manufacturing experience across a broad range of vehicle applications. This part cross-references Spectra Premium CU1841 and APDI 8011841 for the same application.

Common Cooling Issues This Radiator Can Address

• Cracked or leaking radiator tanks
• Restricted coolant flow from an aging core
• Overheating caused by a worn factory radiator
• Cooling system service on BMW E36 chassis vehicles
• Replacement for damaged OE-style radiator assemblies

Installation Notes

Verify radiator dimensions, inlet and outlet orientation, and mounting points before installation. This radiator uses a left-side inlet and right-side outlet, so hose routing should match the vehicle configuration. For BMW 328i, 328is, 323i, and M3 applications, confirm E36 body-code fitment and compare the original radiator to the replacement unit before assembly.

Fits 1992-1997 BMW 325i, N/A; Fits 1992-1995 BMW 325is, N/A; Fits 1994-1999 BMW M3, N/A; Fits 1996-1998 BMW 328i, N/A; Fits 1996-1999 BMW 328is, N/A; Fits 1997-1998 BMW 323i, N/A; Fits 1999 BMW 328i, N/A.

Quality Assurance

CSF radiators are produced in ISO/TSO-certified factories and built to support consistent cooling performance across a wide range of vehicle applications. Part number 2526 reflects CSF’s OE-style manufacturing approach for BMW radiator replacement needs.