One Stop Solutions 2426 Radiator

Radiator for Infiniti M45 and Q45

One Stop Solutions 2426 is a premium replacement radiator built for OE-style form and function. It is engineered for the 2002-2004 Infiniti Q45 and 2003-2004 Infiniti M45, with a downflow design, plastic tanks, and a PA core for direct-fit cooling performance.

• Fits 2003-2004 Infiniti M45, N/A
• Fits 2002-2004 Infiniti Q45, N/A
• Downflow radiator design with 1-row core construction
• Core dimensions: 17 11/16 in. height, 27 1/16 in. width, 5/8 in. thickness
• Transmission oil cooler included with concentric cooler design
• Inlet and outlet diameters: 1 5/16 in.
• Plastic tanks with PA core material
• Part number 2426 cross-references Spectra Premium CU2426 for the same application

Product Details

This One Stop Solutions radiator is built to match original cooling system layout and fitment for Infiniti M45 and Infiniti Q45 applications. The radiator uses premium-grade materials, cadmium-plated tubes, and factory-style component placement to help maintain proper coolant flow and transmission fluid cooling. Each unit is individually pressure tested during production, and the design includes engineering updates such as improved fin density and a thicker core to address heat load in higher-mileage vehicles. Part number 2426 is a direct replacement choice for drivers servicing the cooling system on 2003-2004 Infiniti M45 and 2002-2004 Infiniti Q45 models.

Common Problems This Radiator Can Address

• Coolant leaks from a cracked or aging radiator tank
• Overheating caused by restricted or inefficient heat transfer
• Transmission fluid temperature issues related to a failing cooler circuit
• Reduced cooling performance from worn core fins or internal deterioration
• Fitment problems when replacing an original downflow radiator

Installation Notes

Verify inlet and outlet sizing, header dimensions, and cooler routing before installation. This radiator is designed for drop-in fitment on the listed Infiniti applications, but the cooling system should be inspected for contamination, hose wear, and mounting condition before the new unit is installed. Confirm that the transmission cooler connections match the vehicle’s original configuration.

Quality Assurance

OSC radiators are produced with OE-style engineering standards and are tested during manufacturing before release. The radiator core and cooler circuits are checked as part of the production process to help confirm leak resistance and proper assembly.