Nissens 646948 Radiator

Nissens 646948 Radiator for Lexus IS

The Nissens 646948 radiator is an aluminum cooling component built for select Lexus IS applications. It is engineered to support stable engine temperature control with fitment for 2014-2015 Lexus IS250, 2014-2017 Lexus IS350, and 2016-2017 Lexus IS300, plus 2018 Lexus IS300 and IS350 models built to 10/2017.

Key Features

• Aluminum construction for efficient heat transfer
• Core dimensions: 28.9764 in. height, 15.7480 in. width, 0.6299 in. length
• Direct-fit radiator for select Lexus IS sedan applications
• Part number 646948 for accurate catalog matching
• Cross-reference: Bosch 13477

Product Details

Nissens develops thermal management components with a focus on OE-style fit and consistent cooling performance. The 646948 radiator is part of that lineup and is built in aluminum to help dissipate heat from the engine cooling system. For Lexus IS300, Lexus IS350, and Lexus IS250 applications, this radiator supports the vehicle’s cooling circuit and helps maintain proper operating temperature under daily driving conditions.

This part cross-references Bosch 13477 for the same application.

What This Radiator Helps Address

• Overheating caused by a restricted or failing radiator
• Coolant temperature instability during stop-and-go driving
• Leaks from a damaged or corroded radiator core
• Reduced cooling efficiency in high-mileage Lexus IS models
• Temperature control issues after radiator replacement service

Installation Notes and Tips

Verify radiator dimensions and vehicle build date before installation, especially for 2018 Lexus IS300 and IS350 models built to 10/2017. Confirm hose routing, mounting points, and transmission cooler connections where applicable. Flush the cooling system, inspect hoses and clamps, and refill with the correct coolant specification after installation. Use the part number 646948 to confirm the correct application before ordering.

Quality Assurance

Nissens is a market-leading manufacturer of thermal and engine efficiency components, and its products are developed and manufactured to consistent quality standards. The brand continues to expand its aftermarket coverage as vehicle technology changes, supporting reliable replacement options for Lexus IS cooling system service.