One Stop Solutions 2309 Radiator

Radiator for Ford Explorer and Mountaineer

Restore cooling performance with this OSC Premium New Automotive Radiator, part number 2309. Built for OES form and function, it uses premium-grade aluminum construction with plastic tanks and a crossflow design to match the original layout on select Ford, Mercury, and Mazda applications.

Fits 2001-2005 Ford Explorer Sport Trac, N/A, w/ 2" TOP/BOTTOM CHANNEL; Fits 2001-2003 Ford Explorer Sport, N/A, w/ 2" TOP/BOTTOM CHANNEL; Fits 2000-2001 Ford Explorer, N/A; Fits 2001 Mercury Mountaineer, N/A, 2" CHANNELS; Fits 2000 Mercury Mountaineer, N/A; Fits 2000 Mazda B4000, N/A, 2" TOP/BOTTOM CHANNELS.

Key Features

• Part number 2309 radiator for select Ford Explorer, Explorer Sport Trac, Explorer Sport, Mercury Mountaineer, and Mazda B4000 applications
• Premium aluminum core with plastic tanks for OE-style fit and function
• Crossflow design with one-row core construction
• Transmission oil cooler included with plated cooler type
• Die-cut gasket design helps maintain a leak-resistant seal
• Individually pressure tested during production
• Factory-spec fitted and torqued components
• Multi-fit engineering without changing the original appearance

Detailed Description

OSC part number 2309 is a replacement radiator engineered around original equipment dimensions and cooling requirements. Core measurements include a 20 13/16-inch height, 23 5/16-inch width, and 1-inch thickness, with 1 1/2-inch inlet and outlet diameters. The unit includes a plated transmission oil cooler and uses premium tubes, fins, headers, and tanks to support durable operation in higher-mileage vehicles. This radiator is a direct-fit choice for 2000-2001 Ford Explorer, 2001-2003 Ford Explorer Sport, 2001-2005 Ford Explorer Sport Trac, 2000-2001 Mercury Mountaineer, 2001 Mercury Mountaineer, and 2000 Mazda B4000 applications listed above. If you are replacing a worn radiator on a Ford Explorer or Mercury Mountaineer, part number 2309 is built to match the original cooling package and mounting layout.

This part cross-references Spectra Premium CU2309 for the same application.

Common Problems This Radiator Can Address

• Coolant leaks from a cracked or aging radiator tank
• Overheating caused by restricted or weakened radiator flow
• Transmission temperature concerns related to a failing cooler circuit
• Corrosion or internal wear in an original radiator core
• Poor fitment after a previous replacement with incorrect dimensions

Installation Notes and Tips

Verify the vehicle’s channel size and radiator configuration before installation, especially on Explorer Sport Trac, Explorer Sport, and Mountaineer models with 2-inch top/bottom channels. Confirm inlet and outlet hose alignment, cooler line routing, and mounting points before filling the system. Flush the cooling system and inspect hoses, clamps, and related components so the new radiator can operate with clean coolant and proper flow.

Quality Assurance

OSC tests the transmission and engine oil coolers before assembly, checks the radiator core prior to assembly, and tests the completed unit again after assembly. The design also incorporates engineering updates aimed at improving durability and cooling performance in demanding, high-mileage use.