Part #: 3541

CSF 3541 Radiator

1 Row Plastic Tank Aluminum Core
⚙️ 3 vehicles fit this part
🔍
Select your vehicle to confirm fitment
Verify this part fits before purchasing — free returns if it doesn't
$158.56Free Shipping
🚚Free ShippingNo Cost to Continental U.S.
🔄Free Returns*Wrong fit? No cost
🛡️60-Day ReturnsMoney back guarantee
*Free return shipping only qualifies if our fitment verification tool is used.
🔥
✅ In Stock · Ready To Ship Most orders ship same-day if ordered before 1pm CST.
OE Direct Replacement — Bolt-on fit, no modifications needed
📦1 Row Plastic Tank Aluminum Core
🚗Fitment: Mazda, 6
🔄Easy Returns — Return within 60 days for a full refund
🚚Fast Shipping — Most orders ship same business day before 1pm CST

Overview of CSF 3541 Radiator for Mazda 6

The CSF 3541 radiator is designed specifically for Mazda 6 models, featuring a durable aluminum core paired with plastic tanks. This radiator offers reliable cooling performance with a single-row core construction, engineered to meet OEM specifications.

  • Core thickness: 5/8 inch
  • Core width: 28 11/16 inches
  • Core length: 14 7/8 inches
  • Aluminum core material with plastic tanks
  • Down flow design for efficient coolant circulation
  • Inlet and outlet diameter: 1 3/8 inches, positioned on the left
  • Includes a high-efficiency concentric type oil cooler (13 3/4 inches)
  • Cap not included; compatible with CSF cap number 4540

About the 1 Row Plastic Tank Aluminum Core Product Line

The CSF 1 Row Plastic Tank Aluminum Core line combines lightweight plastic tanks with a robust aluminum core to provide effective heat dissipation and corrosion resistance. This product line is engineered to replicate OEM style and fitment, ensuring compatibility and performance for vehicles like the Mazda 6. The single-row core design balances cooling efficiency with compact size, suitable for applications requiring precise fitment and reliable operation.

Detailed Product Description

The CSF 3541 radiator features a 5/8 inch thick aluminum core measuring 28 11/16 inches wide and 14 7/8 inches long, optimized for the Mazda 6 cooling system. Its down flow configuration promotes effective coolant flow from top to bottom, enhancing heat exchange. Both the inlet and outlet have a 1 3/8 inch diameter and are located on the left side, matching factory specifications. The plastic tanks reduce weight while maintaining durability, and the integrated high-efficiency concentric oil cooler (13 3/4 inches) supports engine oil temperature regulation. This radiator does not include a cap but is compatible with CSF cap number 4540.

Common Applications and Issues Addressed

  • Replacement for leaking or damaged Mazda 6 radiators
  • Solves overheating caused by clogged or inefficient cooling cores
  • Addresses coolant flow restrictions due to core damage
  • Restores proper engine oil cooling with integrated oil cooler
  • Prevents corrosion and tank failure common in older radiators

Installation Notes and Tips

Ensure the radiator is compatible with your specific Mazda 6 model year before installation. Verify inlet and outlet hose connections match the 1 3/8 inch left-side configuration. Since the radiator does not include a cap, use the CSF cap number 4540 or an equivalent OEM cap. Inspect all hoses and clamps for wear during replacement to maintain a secure cooling system. Properly bleed the cooling system after installation to avoid air pockets.

Quality Assurance and Warranty

CSF radiators are manufactured to meet OEM standards, using corrosion-resistant aluminum cores and durable plastic tanks. This product is free of hazardous materials and designed for long-term reliability. Warranty details should be confirmed with the distributor or manufacturer, as they may vary by region.

BrandCSF
Part Number3541
Position1 Row Plastic Tank Aluminum Core
Core Thickness5/8
Core Width28 11/16
Core MaterialAluminum
Tank MaterialPlastic
Core Length14 7/8
Inlet Diameter1 3/8 left
Outlet Diameter1 3/8 left
Down Flow Or Cross Flow TypeDown flow
Radiator Core Row Quantity1
Cap IncludedNo
Box Height (in)5 4/16
Box Length (in)32 5/8
Box Weight (lbs)9
Box Width (in)21 15/16
Csf Cap Number4540
Hazardous MaterialNo
Inlet Length (in)29 1/2
Inlet Width (in)1 5/8
Oil Cooler (in)13 3/4 (high-effeciency concentric type)
Outlet Length (in)29 1/2
Outlet Width (in)1 5/8
Tech NoteO.e.m. style plastic tanks & aluminum core.

This part fits 3 vehicles. Search below:

YearMakeModelLitersCylindersPositionNotes
2013Mazda62.5LL4N/AOE style design ensures optimal fitment and performance.; 1 Row Plastic Tank Aluminum Core
2012Mazda62.5LL4N/AOE style design ensures optimal fitment and performance.; 1 Row Plastic Tank Aluminum Core
2011Mazda62.5LL4N/AOE style design ensures optimal fitment and performance.; 1 Row Plastic Tank Aluminum Core

* Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.

This part directly replaces or is cross-referenced with the following part numbers:

133898013389L5A3-15-200AL5A4-15-200AMA3010238

Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.