Koyorad A2636 Radiator

Koyorad A2636 Radiator for BMW Cooling Service

The Koyorad A2636 radiator is an OE-equivalent replacement built for BMW cooling system service. It uses an aluminum core with plastic tanks and the correct 1.5-inch inlet and outlet sizing for the listed applications, making it a direct-fit solution for BMW Z4, Z3, 325i, 330i, and related models.

Koyorad Radiator products are developed with the technical experience needed to produce accurate replacement radiators that match factory-style fitment and cooling performance requirements. The A2636 follows that approach with a single-row aluminum core sized for the specified BMW chassis.

Key Features

• Part number: A2636
• OE-equivalent radiator replacement from Koyorad
• Aluminum core with plastic tanks
• Single-row core design
• Core dimensions: 22.8125 in. height, 18.4375 in. width, 1.0625 in. thickness
• 1.5 in. inlet and 1.5 in. outlet diameters
• Compatible with BMW Z4, BMW Z3, BMW 325i, BMW 330i, and other listed applications

Detailed Description

The Koyorad A2636 radiator is built for BMW owners replacing a worn or leaking cooling unit with an OE-style part. Its aluminum core helps transfer heat efficiently, while the plastic tank construction matches the factory-style layout used on the listed vehicles. This radiator is specified for 1997-2008 BMW applications, including 2003-2008 BMW Z4, 1997-2002 BMW Z3, and multiple E46 chassis models such as 325i and 330i. The part number A2636 is the reference to verify fitment before ordering.

This part cross-references no listed interchange numbers in the provided data.

Vehicle Fitment

• Fits 2003-2008 BMW Z4, N/A
• Fits 2001-2005 BMW 325Ci, N/A; External Oil Cooler; Koyorad Radiator
• Fits 2001-2005 BMW 325i, N/A
• Fits 2001-2005 BMW 325xi, N/A; External Oil Cooler; Koyorad Radiator
• Fits 2001-2005 BMW 330Ci, N/A; External Oil Cooler; Koyorad Radiator
• Fits 2001-2005 BMW 330i, N/A
• Fits 2001-2005 BMW 330xi, N/A; External Oil Cooler; Koyorad Radiator
• Fits 1997-2002 BMW Z3, N/A
• Fits 2000 BMW 323Ci, N/A; External Oil Cooler; Koyorad Radiator
• Fits 1999-2000 BMW 323i, N/A
• Fits 1999-2000 BMW 323ti, N/A; External Oil Cooler; Koyorad Radiator
• Fits 1999 BMW 323is, N/A; External Oil Cooler; Koyorad Radiator

Common Cooling Issues Addressed

• Coolant leaks from a cracked or aging radiator tank
• Restricted heat transfer from a clogged or deteriorated core
• Overheating caused by reduced radiator efficiency
• Fitment problems from using the wrong BMW radiator configuration
• Cooling system service on BMW Z4, Z3, 325i, and 330i models

Installation Notes and Tips

Verify the vehicle year, model, and cooling configuration before installation, especially on applications noted with an external oil cooler. Confirm inlet and outlet hose sizing, mounting points, and surrounding components before removing the original radiator. Inspect hoses, clamps, thermostat, and coolant condition during radiator replacement to help complete the repair correctly.

Quality Assurance

Koyorad manufactures OE-equivalent radiators using application-specific dimensions and materials for accurate replacement fitment. The A2636 is built to match the listed BMW applications and cooling system requirements.