One Stop Solutions 1815 Radiator

OE-Style Radiator for Honda and Isuzu

This OSC Premium New Automotive Radiator is built for OE form and function with a downflow design, plastic tanks, and a premium aluminum core. It is engineered for direct replacement use on select Honda Odyssey and Isuzu Oasis applications, including part number 1815.

Key Features

• Downflow radiator design with 1-row core construction
• Premium aluminum core with plastic tanks
• Transmission oil cooler included with concentric cooler design
• Core dimensions: 16 3/4 in. height, 26 3/4 in. width, 1 in. thickness
• 1 1/4 in. inlet and outlet diameters
• Die-cut gasket design for leak resistance
• Individually pressure tested during production
• Factory-style fitment for easier installation

Detailed Description

OSC part number 1815 is a replacement radiator engineered to match original equipment form and function for 1995-1998 Honda Odyssey and 1996-1999 Isuzu Oasis models. The unit uses premium-grade aluminum construction with plastic tanks and a concentric transmission oil cooler, helping maintain proper cooling performance in vehicles that rely on a direct-fit OE-style radiator. The radiator is built with factory-spec components and includes the necessary fittings or hardware for installation.

This radiator is designed around the original cooling layout, with a 27 11/16 in. inlet header length, 27 11/16 in. outlet header length, and a 12 13/16 in. distance between transmission cooler fittings. It is a practical choice for drivers searching for a Honda Odyssey radiator replacement, an Isuzu Oasis radiator replacement, or OSC 1815 for OE-style cooling system service.

This part cross-references Koyorad A1815 and Spectra Premium CU1815 for the same application.

Common Problems This Radiator Can Address

• Cracked or leaking radiator tanks
• Restricted coolant flow from an aging core
• Transmission cooler leakage or reduced cooler performance
• Overheating caused by worn internal radiator components
• Cooling system failure on high-mileage Honda Odyssey and Isuzu Oasis vehicles

Installation Notes and Tips

Verify inlet and outlet sizes, cooler style, and overall dimensions before installation. Inspect hoses, clamps, and surrounding cooling system components for wear, and flush the system if contamination or debris is present. This radiator is a direct replacement style unit, so fitment should be confirmed against the vehicle’s original radiator configuration before assembly.

Quality Assurance

OSC tests the radiator core before assembly, then tests the transmission and engine oil coolers prior to tank installation, and performs a final pressure test after assembly. The design also incorporates engineering updates aimed at improving durability and cooling performance over original failure points.