Denso 221-9550 Radiator

Denso 221-9550 Radiator for Lexus RX350

The Denso 221-9550 radiator is built for 2013-2015 Lexus RX350 applications with the OE-style fitment and cooling dimensions needed for dependable engine temperature control. With core sizing, inlet and outlet diameters, and materials matched to OE standards, this radiator supports consistent cooling performance in daily driving and demanding conditions.

• Fits 2013-2015 Lexus RX350, N/A, excluding Japan-built vehicles and towing package models
• Core height: 15.7480 in.
• Core width: 30.2362 in.
• Core thickness: 0.6299 in.
• Inlet diameter: 1.3780 in.
• Outlet diameter: 1.3701 in.
• Denso part number 221-9550 for OE-style replacement selection

OE-Style Cooling Performance

Denso supplies radiators to vehicle manufacturers worldwide, and the 221-9550 reflects that OE engineering background. The radiator configuration, tank design, fin pitch, core dimensions, and material selection are built to meet strict manufacturer standards, helping maintain proper coolant flow and heat transfer in the Lexus RX350. This part cross-references Spectra Premium CU13116 for the same application.

Common Problems This Radiator Addresses

• Overheating caused by a leaking or restricted radiator
• Reduced cooling efficiency from damaged fins or internal blockage
• Coolant loss from cracked tanks or worn seams
• Temperature fluctuations during stop-and-go driving
• Cooling system service needs on a 2013-2015 Lexus RX350

Installation Notes and Tips

Verify vehicle configuration before ordering: this radiator excludes Japan-built vehicles and towing package models. Confirm inlet and outlet hose sizes, mounting points, and overall core dimensions against the original unit before installation. Flush the cooling system, inspect hoses and clamps, and refill with the correct coolant mixture after replacement.

Quality Assurance

Each Denso radiator passes durability and function testing before release. That testing process, combined with OE supplier experience, supports reliable fitment and cooling performance for Lexus RX350 radiator replacement applications.