One Stop Solutions 1304 Radiator

Radiator for Lexus LS400

This OSC Premium radiator is built for the 1990-1994 Lexus LS400 with an OE-style downflow layout and integrated transmission oil cooler. Part number 1304 is engineered for factory-style fit and cooling performance, with premium aluminum construction and plastic tanks for a direct replacement solution.

Key Features

• Fits 1990-1994 Lexus LS400, N/A
• Downflow radiator design with one-row core construction
• Transmission oil cooler included with concentric cooler type
• Premium-grade aluminum core with plastic tanks
• Core dimensions: 15 3/4 in. height, 29 13/16 in. width, 1 in. thickness
• 1 1/2 in. inlet and outlet diameters
• Engineered for OE form and function
• Part number 1304

Detailed Description

OSC part number 1304 is a replacement radiator for the Lexus LS400 that follows original equipment cooling layout and fitment. The radiator uses premium aluminum tubes and fins, plastic tanks, and a die-cut gasket design to help maintain a secure seal. It also includes a concentric transmission cooler and is built with factory-style header dimensions for a direct-fit installation on 1990-1994 Lexus LS400 models.

For buyers searching for a 1990 Lexus LS400 radiator, 1991-1994 Lexus LS400 cooling replacement, or an OE-style radiator with transmission cooler, this unit is built around the original application. The radiator is individually pressure tested during production and uses engineering updates aimed at improving durability and cooling consistency in higher-mileage vehicles. Part number 1304 is also cross-referenced with APDI 8011304 for the same application.

Common Problems This Radiator Can Address

• Coolant leaks from an aging radiator core or tank seam
• Overheating caused by restricted or weakened cooling passages
• Transmission fluid temperature concerns tied to a failing cooler circuit
• Reduced cooling efficiency from worn fins or deteriorated internal components
• Fitment issues when replacing a damaged OE-style Lexus LS400 radiator

Installation Notes and Tips

Verify inlet and outlet sizing, header dimensions, and cooler connection spacing before installation. Transfer any required vehicle-specific components from the original radiator if applicable, and inspect hoses, clamps, and mounts for wear before reassembly. This radiator is designed for direct replacement use on the listed Lexus LS400 applications.

Quality Assurance

OSC radiators are produced with multiple inspection steps during manufacturing, including testing of the cooler circuits before tank installation, core testing before assembly, and a final assembled-unit test. The design also incorporates updates such as improved fin density and enhanced core construction to address common failure points seen in higher-mileage vehicles.