Global Parts 13596C Radiator - Primary

Radiator for Lexus RX350 and RX450h

Global Parts radiator 13596C is a direct-fit cooling system replacement for select Lexus RX models. It uses an aluminum core with plastic tanks and includes a transmission oil cooler to support stable operating temperatures in daily driving and stop-and-go traffic.

Key Features

• Aluminum core construction for efficient heat transfer
• Plastic tank design for OE-style fitment
• Transmission oil cooler included
• Cross-flow radiator layout
• 1.38 in. inlet diameter (35.05 mm)
• Engine oil cooler not included

Detailed Description

This Global Parts radiator, part number 13596C, is built for vehicles that need reliable engine cooling after the original radiator wears out or leaks. It is engineered for the 2016-2019 Lexus RX350, 2022 Lexus RX350, 2018-2019 Lexus RX350L, 2021-2022 Lexus RX350L, 2016-2022 Lexus RX450h, 2018-2022 Lexus RX450hL, and 2020 Lexus RX350L Primary w/ TOC. The aluminum core helps dissipate heat, while the plastic tanks follow a common OE-style radiator design for the Lexus RX platform. This part cross-references CSF 3820 for the same application.

Common Issues This Radiator Addresses

• Coolant leaks from a cracked or aging radiator tank
• Overheating caused by reduced heat dissipation
• Transmission temperature concerns when the radiator cooler circuit fails
• Cooling system performance loss from internal radiator deterioration
• Replacement needs after corrosion, impact damage, or long-term wear

Installation Notes and Tips

Verify radiator hose connection size, inlet diameter, and transmission cooler routing before installation. Drain the cooling system fully, inspect hoses and clamps, and flush the system if contamination is present. Confirm fitment by year, model, and configuration before ordering, especially for 2020 Lexus RX350L Primary w/ TOC applications.

Quality Assurance

Global Parts supplies replacement cooling components for late-model import applications, and this radiator is built to match the listed Lexus RX fitments and cooling-system requirements.