Denso 221-9571 Radiator

Denso Radiator for Lexus RX Cooling

The Denso 221-9571 radiator is built for Lexus RX applications that need OE-style cooling performance and precise fitment. It is engineered with radiator dimensions, tank design, fin pitch, and materials that align with original equipment standards for dependable engine temperature control.

For Lexus RX350 and RX450h owners, this radiator supports consistent cooling under daily driving, towing, and demanding operating conditions. The Denso radiator line reflects OE supplier experience, with each unit passing durability and function testing before release.

Key Features

• Core height: 19.6460
• Core width: 29.4090
• Core thickness: 1.0240
• Inlet diameter: 1.3580
• Outlet diameter: 1.3580
• Transmission oil cooler included
• OE-style radiator configuration for accurate fitment
• Built to meet rigid OE manufacturer standards

Detailed Description

Denso part number 221-9571 is a radiator designed for select Lexus RX models, including 2020-2022 Lexus RX350, 2020-2022 Lexus RX350L, 2020-2022 Lexus RX450h, 2016-2019 Lexus RX350, 2019 Lexus RX450h, and 2016-2018 Lexus RX450h. This radiator is a direct-fit cooling component for vehicles that require stable coolant flow and integrated transmission oil cooling. It is also cross-referenced to one common aftermarket application number, such as Spectra Premium CU13602.

Denso’s OE background is reflected in the radiator’s construction and validation process. The core dimensions, inlet and outlet sizing, and integrated cooler design are selected to match the needs of the original cooling system, helping maintain proper engine operating temperature in Lexus RX350 and Lexus RX450h applications.

What This Radiator Helps Address

• Overheating caused by a worn or restricted radiator
• Coolant leaks from aging tanks or core damage
• Reduced cooling efficiency during towing or heavy use
• Transmission heat management in vehicles with an included oil cooler
• Fitment issues from non-OE-style replacement radiators

Installation Notes and Tips

Verify radiator dimensions, inlet and outlet diameter, and transmission cooler connections before installation. Drain the cooling system fully, inspect hoses and clamps for wear, and confirm the replacement unit matches the vehicle’s original configuration. Fits 2020-2022 Lexus RX350, N/A; Fits 2020-2022 Lexus RX350L, N/A; Fits 2020-2022 Lexus RX450h, Primary; Fits 2016-2019 Lexus RX350, N/A; Fits 2019 Lexus RX450h, N/A; Fits 2016-2018 Lexus RX450h, N/A.

Quality Assurance

Denso radiators are produced to OE-level standards and undergo durability and function testing to support reliable performance. The brand’s experience supplying radiators to vehicle manufacturers informs the fit, construction, and cooling performance of part number 221-9571.