CSF 3804 Radiator
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CSF

CSF 3804 Radiator

Brand CSF 3804
Box Height (in) 6 7/16
Box Length (in) 31 5/8
Box Weight (lbs) 9
Box Width (in) 22 3/16
Cap Included No
Core Length 14 13/16
Core Material Aluminum
Core Thickness 5/8
Core Width 28 11/16
Csf Cap Number 4503
Down Flow Or Cross Flow Type Down Flow
Hazardous Material No
Inlet Diameter 1 5/16 Left
Inlet Length (in) 29 1/2
Inlet Width (in) 1 5/8
Outlet Diameter 1 5/16 Centre
Outlet Length (in) 29 1/2
Outlet Width (in) 1 5/8
Radiator Core Row Quantity 1
Tank Material Plastic
Tech Note O.E.M. style Plastic tanks & Aluminum core.
Fits Mazda · 8 vehicles

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

Wind tunnel tested. Validated for cooling performance in laboratory testing.

Aluminum core. Lightweight construction helps support efficient heat transfer.

Cross-references APDI 8013367, BBB Industries 13367 and MA3010236 for the same application. See all 6.

$89.45Free shipping
In stock · usually ships same day before 1pm CST
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Step 2 — Quantity
Order total $89.45
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Free returns within 60 days if it doesn't fit when fitment is verified.
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OE-Style Radiator for Mazda 6

The CSF 3804 radiator is an OE-style cooling replacement built with an aluminum core and plastic tanks for the 2014-2021 Mazda 6. It is engineered for direct-fit service on the Mazda 6 cooling system, with down-flow construction and factory-style inlet and outlet sizing.

Key Features

  • Fits 2014-2020 Mazda 6 and 2021 Mazda 6
  • CSF part number 3804
  • Aluminum core with plastic tanks
  • Down-flow radiator design
  • Single-row core construction
  • Core dimensions: 28 11/16 in. wide, 14 13/16 in. long, 5/8 in. thick
  • Inlet: 1 5/16 in. left; outlet: 1 5/16 in. center
  • OE-style plastic tank and aluminum core layout

Detailed Description

Built for Mazda 6 applications, the CSF 3804 radiator follows an OE-style design that helps maintain factory cooling-system layout and fitment. The aluminum core supports efficient heat transfer, while the plastic tanks match the original-style construction used on many late-model passenger vehicles. CSF manufactures radiators to performance-focused standards and validates cooling performance through laboratory wind-tunnel testing.

This radiator is a direct replacement choice for drivers searching for a 2014-2021 Mazda 6 radiator, a 2021 Mazda 6 cooling replacement, or a CSF 3804 OE-style radiator for Mazda 6 service. It cross-references APDI 8013367 for the same application.

What It Helps Address

  • Overheating caused by a leaking or restricted radiator
  • Coolant loss from cracked tanks or aged core materials
  • Reduced cooling efficiency from corrosion or internal blockage
  • Fitment issues when replacing a damaged OE radiator
  • Cooling-system service on a Mazda 6 with factory-style routing

Installation Notes and Tips

Verify inlet and outlet orientation before installation: inlet is 1 5/16 in. left and outlet is 1 5/16 in. center. Confirm radiator dimensions and hose routing against the original unit before transfer. This radiator does not include a cap, and the listed CSF cap number is 4503 if a matching cap is needed separately.

Quality Assurance

CSF radiators are manufactured in ISO/TSO-certified facilities and built to high-performance standards. The brand has supplied radiators worldwide for decades and uses engineering validation to support cooling performance and OE-style fitment.

Related reading

This part fits 8 vehicles
Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
YearMakeModelLitersCylindersPositionNotes
2021Mazda62.5LL4N/A—
2020Mazda62.5LL4N/AOE style design ensures optimal fitment and performance.
2019Mazda62.5LL4N/AOE style design ensures optimal fitment and performance.
2018Mazda62.5LL4N/AOE style design ensures optimal fitment and performance.
2017Mazda62.5LL4N/AOE style design ensures optimal fitment and performance.
2016Mazda62.5LL4N/AOE style design ensures optimal fitment and performance.
2015Mazda62.5LL4N/AOE style design ensures optimal fitment and performance.
2014Mazda62.5LL4N/AOE style design ensures optimal fitment and performance.
Directly replaces or cross-references 6 part numbers
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.
APDI — 8013367BBB Industries — 13367MA3010236PE11-15-200PE11-15-200BPE16-15-200