CSF
1 Row Plastic Tank Aluminum Core

CSF 2812 Radiator

Brand CSF 2812
Box Height (in) 4 14/16
Box Length (in) 29 7/8
Box Weight (lbs) 8
Box Width (in) 19 3/16
Cap Included No
Core Length 12 15/16
Core Material Aluminum
Core Thickness 5/8
Core Width 27 1/16
Csf Cap Number 4503
Down Flow Or Cross Flow Type Down Flow
Hazardous Material No
Inlet Diameter 1 1/8 Left
Inlet Length (in) 27 13/16
Inlet Width (in) 1 5/8
Oil Cooler (in) 13 3/4 (high-effeciency Concentric Type)
Outlet Diameter 1 1/8 Right
Outlet Length (in) 27 13/16
Outlet Width (in) 1 5/8
Radiator Core Row Quantity 1
Tank Material Plastic
Tech Note O.E.M. style Plastic tanks & Aluminum core.
Product line 1 Row Plastic Tank Aluminum Core
Fits Mazda · 10 vehicles

OE-style construction. Plastic tanks and an aluminum core match the original design.

Wind tunnel tested. Engineered to validate cooling performance in the lab.

Down-flow design. Promotes efficient coolant flow through the radiator.

Cross-references Anchor 2446, Anchor 2447 and APDI 8012447 for the same application. See all 20.

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Step 2 — Quantity
Order total $116.09
Free shipping to the continental U.S.
Free returns within 60 days if it doesn't fit when fitment is verified.

OE-Style Cooling Replacement for Mazda Protege

Restore cooling system performance with the CSF 2812 radiator, built with an aluminum core and OEM-style plastic tanks. This down-flow design is engineered for the 1999-2003 Mazda Protege and 2002-2003 Mazda Protege5, making it a direct-fit choice for drivers replacing a leaking or inefficient factory radiator.

CSF manufactures radiators to high-performance standards and validates cooling performance through laboratory wind-tunnel testing. The 2812 follows an OE-style layout with a 1-row aluminum core, left-side inlet, right-side outlet, and integrated high-efficiency concentric oil cooler section.

Key Features

  • Part number 2812 radiator for Mazda Protege and Mazda Protege5 applications
  • 1-row aluminum core with plastic tanks for OE-style construction
  • Down-flow radiator design
  • Core thickness: 5/8 in.
  • Inlet diameter: 1 1/8 in. left; outlet diameter: 1 1/8 in. right
  • High-efficiency concentric oil cooler section
  • No cap included; CSF cap number 4503

Detailed Description

The CSF 2812 is designed for owners seeking a direct replacement radiator that matches the original cooling layout used in the Mazda Protege and Mazda Protege5. Its aluminum core helps transfer heat efficiently, while the plastic tank construction follows the OE-style design noted by CSF. With a down-flow configuration and application-specific inlet and outlet placement, this radiator supports proper coolant routing in the factory cooling system.

CSF has produced radiators for more than 50 years and supplies a wide range of vehicle applications worldwide. The 2812 reflects that experience with a lab-tested design intended to meet cooling performance requirements for daily driving and routine replacement service. This part number 2812 is also a practical cross-reference for related OE-style radiator listings used on the same application.

What This Radiator Helps Address

  • Coolant leaks from a cracked or aging radiator tank
  • Overheating caused by reduced heat dissipation
  • Restricted coolant flow from internal radiator wear
  • Corrosion or deterioration in the original cooling unit
  • Replacement needs after collision or front-end damage

Installation Notes and Tips

Verify inlet and outlet orientation before installation: left-side inlet and right-side outlet. Confirm the vehicle uses the OE-style down-flow layout and check surrounding cooling components, hoses, and fan operation before final assembly. This radiator is listed for 1999-2003 Mazda Protege and 2002-2003 Mazda Protege5, so match the vehicle year and model exactly before ordering.

Quality Assurance

CSF states that its factories are ISO/TSO certified and that its radiators are engineered and wind-tunnel tested for cooling performance validation. The brand has supplied radiators worldwide for decades across a broad range of vehicle applications.

This part fits 10 vehicles
Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
YearMakeModelLitersCylindersPositionNotes
2003MazdaProtege2.0LL4N/AOE style design with Mini 16 psi cap.; 1 Row Plastic Tank Aluminum Core
2003MazdaProtege52.0LL4N/AOE style design with Mini 16 psi cap.; 1 Row Plastic Tank Aluminum Core
2002MazdaProtege2.0LL4N/AOE style design with Mini 16 psi cap.; 1 Row Plastic Tank Aluminum Core
2002MazdaProtege52.0LL4N/AOE style design with Mini 16 psi cap.; 1 Row Plastic Tank Aluminum Core
2001MazdaProtege1.6LL4N/AOE style design with Mini 16 psi cap.; 1 Row Plastic Tank Aluminum Core
2001MazdaProtege2.0LL4N/AOE style design with Mini 16 psi cap.; 1 Row Plastic Tank Aluminum Core
2000MazdaProtege1.8LL4N/AOE style design with Mini 16 psi cap.; 1 Row Plastic Tank Aluminum Core
2000MazdaProtege1.6LL4N/AOE style design with Mini 16 psi cap.; 1 Row Plastic Tank Aluminum Core
1999MazdaProtege1.6LL4N/AOE style design with Mini 16 psi cap.; 1 Row Plastic Tank Aluminum Core
1999MazdaProtege1.8LL4N/AOE style design with Mini 16 psi cap.; 1 Row Plastic Tank Aluminum Core
Directly replaces or cross-references 20 part numbers
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.
Anchor — 2446Anchor — 2447APDI — 8012447DENSO Auto Parts — 221-3504DENSO Auto Parts — 221-3506FEL-PRO — 2302OSC — 2303Partslink Numbering System — MA3010139Spectra Premium — CU2303801230280123038012446B35S-15-200FS7P-15-200 AFS8M-15-200 AZL01 - 15 - 200 AZL33-15-200ZM02 - 15 - 200ZM39-15-200ZM43-15-200