One Stop Solutions 1906 Radiator

Radiator for Mitsubishi Diamante

This OSC Premium New Automotive Radiator is built for 1997-2004 Mitsubishi Diamante applications and is engineered for OES form and function. Part number 1906 is a direct-fit cooling replacement with a downflow design, plastic tanks, and a single-row aluminum core for dependable heat transfer.

• Fits 1997-2004 Mitsubishi Diamante
• Downflow radiator design with 15 3/4 in. core height and 28 1/4 in. core width
• 1 in. core thickness with a single-row core layout
• Plastic tanks with premium-grade aluminum construction
• Transmission oil cooler included with concentric cooler design
• Inlet and outlet diameters measure 1 3/8 in.
• Engine oil cooler not included
• Part number 1906 for Mitsubishi Diamante radiator replacement

Built for OE-Style Cooling Performance

OSC designs this radiator to match original equipment form and function while adding durability-focused improvements. The core, tanks, headers, and related components are engineered for factory-style fitment, and the unit is individually pressure tested during production. For Mitsubishi Diamante owners looking for a radiator replacement that follows OE cooling layout, part number 1906 provides the correct downflow configuration with an integrated transmission oil cooler.

This part cross-references Mitsubishi OE-style numbers such as 8011906 and A1906 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 fluid temperature concerns tied to a failing cooler circuit
• Reduced cooling efficiency from worn core fins or internal buildup
• Fitment issues when replacing an original Mitsubishi Diamante radiator

Installation Notes and Tips

Verify radiator dimensions, inlet and outlet size, and cooler line layout before installation. This unit is engineered for drop-in fit, form, and function on 1997-2004 Mitsubishi Diamante models, and all required fittings or hardware are included in the radiator assembly. Flush the cooling system, inspect hoses and clamps, and confirm proper transmission cooler line routing during installation.

Quality Assurance

OSC tests the transmission and engine oil coolers before tank installation, checks the radiator core prior to assembly, and tests the completed unit again after assembly. The radiator is also pressure tested individually to help confirm sealing and performance before it leaves production.