Denso 221-9423 Radiator

Denso 221-9423 Radiator for Infiniti Cooling Repair

The Denso 221-9423 radiator is built for direct-fit cooling system service on select Infiniti models, including the Q70, Q70L, and M37. With OE-style dimensions and carefully matched inlet and outlet sizing, it supports consistent coolant flow and dependable engine temperature control.

For drivers searching for a radiator for 2011-2013 Infiniti M37 or a radiator for 2014-2018 Infiniti Q70 and 2015-2018 Infiniti Q70L, this Denso unit is engineered to match the original application closely.

Key Features

• Core height: 25.0000
• Core width: 17.5591
• Core thickness: 0.6299
• Inlet diameter: 1.3780
• Outlet diameter: 1.3780
• OE-style radiator configuration for accurate fitment
• Built to Denso’s OE manufacturing standards for radiator performance

Detailed Description

Denso Part Number 221-9423 is a replacement radiator developed with the same OE-focused engineering approach Denso supplies to vehicle manufacturers worldwide. The radiator’s core dimensions, tank configuration, fin pitch, and materials are selected to align with original equipment requirements, helping maintain proper engine cooling under everyday driving and demanding conditions. This makes it a practical choice for Infiniti cooling system repair where fitment and thermal performance matter.

This part cross-references Spectra Premium CU13284 and APDI 8013284 for the same application. It is a strong match for Infiniti Q70 cooling system service, Infiniti Q70L radiator replacement, and Infiniti M37 radiator replacement needs.

What It Helps Address

• Overheating caused by a failing or restricted radiator
• Coolant leaks from cracked or aged radiator components
• Reduced cooling efficiency from damaged core passages
• Temperature instability during stop-and-go or highway driving
• Replacement needs after corrosion, impact, or long-term wear

Installation Notes and Tips

Verify the vehicle’s year, model, and cooling system layout before installation. Confirm inlet and outlet sizing, mounting points, and surrounding component clearance against the original radiator. After installation, refill the cooling system with the correct coolant, bleed air from the system, and inspect for leaks and proper operating temperature.

Quality Assurance

Denso radiators are produced to meet OE manufacturer standards and are subjected to durability and function testing before release. That OE experience supports reliable fitment and consistent cooling performance for select Infiniti applications.