CSF OEM Plastic Radiator Subaru Legacy 3.6L 2015-2019 | 3803

Product Fitment: 

2015-2019 Subaru Legacy 3.6L

The CSF 3803 Radiator is a direct-fit replacement designed for 2015–2019 Subaru Legacy and Subaru Outback models with the 3.6L engine. It features an aluminum core and reinforced plastic tanks, built to OEM-style specifications for reliable performance and long-term durability.

This radiator uses a single-row, down-flow core with approximate dimensions of 27.00" × 13.75" × 1.25", providing efficient coolant flow and heat dissipation under daily driving or heavier load conditions. Multi-louvered fins maximize surface area for optimal cooling, and the unit is thoroughly leak- and pressure-tested to ensure long-term reliability.

The CSF 3803 matches OEM inlet/outlet layout and mounting geometry, allowing for a straightforward, drop-in installation with no modifications required. It’s an excellent choice for replacing a failing radiator, restoring cooling system efficiency, or upgrading an aging unit for better performance.

Key Features

• Direct-fit radiator for 2015–2019 Subaru Legacy and Outback 3.6L

• Aluminum core with reinforced plastic tanks for durability

• Single-row down-flow core for efficient cooling

• Core dimensions: ~27.00" × 13.75" × 1.25"

• Multi-louvered fin design for maximum heat dissipation

• OEM-style inlet/outlet and mounting points for easy installation

• Leak- and pressure-tested for reliable long-term performance

Benefits

• Maintains stable engine temperatures and restores proper cooling

• OEM-spec fitment ensures easy, bolt-in installation

• Durable construction suitable for daily use or higher-load driving

• Ideal replacement for worn, clogged, or leaking factory radiators