Home› Belts and Cooling > Radiators, Coolers and Related Components› CSF 3766 Radiator
CSF 3766 RadiatorOE Quality 60-Day Returns
Part #: 3766

CSF 3766 Radiator

⚙️ 17 vehicles fit this part
🔍
Select your vehicle to confirm fitment
Verify this part fits before purchasing — free returns if it doesn't
$131.48Free 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
🚗Fitment: Mazda, CX-5
🔄Easy Returns — Return within 60 days for a full refund
🚚Fast Shipping — Most orders ship same business day before 1pm CST
Not what you need? Click here for all Radiator options

Overview of CSF Radiator for Mazda CX-5

The CSF radiator part number 3766 is designed specifically for the Mazda CX-5, providing reliable cooling performance. Featuring an aluminum core and plastic tanks, this radiator supports efficient heat dissipation to maintain optimal engine temperature.

  • Core thickness: 5/8 inch
  • Core width: 28 11/16 inches
  • Core length: 16 7/8 inches
  • Aluminum core material with plastic tanks
  • Down flow radiator design
  • Inlet diameter: 1 5/16 inches (left side)
  • Outlet diameter: 1 5/16 inches (center)
  • Single core row construction
  • Cap not included (CSF cap number 4503 compatible)

Detailed Product Description

This CSF radiator (part number 3766) is engineered with an OEM-style design, featuring plastic tanks paired with a durable aluminum core. The down flow configuration ensures effective coolant flow through the radiator core, which measures 5/8 inch thick, 28 11/16 inches wide, and 16 7/8 inches long. The single core row construction balances cooling efficiency with compact size, suitable for the Mazda CX-5 cooling system requirements. The inlet and outlet diameters are both 1 5/16 inches, positioned on the left and center respectively, matching factory specifications for seamless integration.

Compatible Vehicles and Applications

  • Replacement radiator for Mazda CX-5 models requiring a down flow radiator
  • Addresses overheating issues caused by radiator core damage or clogging
  • Suitable for resolving coolant leaks from plastic tanks or core
  • Restores proper engine temperature regulation for improved performance
  • Ideal for vehicles experiencing reduced cooling efficiency or radiator corrosion

Installation Notes and Tips

When installing the CSF radiator 3766 on a Mazda CX-5, ensure the radiator cap is compatible with CSF cap number 4503, as the cap is not included. Verify inlet and outlet hose connections match the 1 5/16 inch diameter specifications. Properly bleed the cooling system after installation to prevent air pockets and ensure optimal coolant flow. Inspect mounting points for secure fitment and avoid damage to plastic tanks during handling.

Quality Assurance and Warranty

CSF radiators are manufactured to meet OEM standards, using high-quality aluminum cores and durable plastic tanks. This radiator is free of hazardous materials and designed for long-term reliability. While specific warranty details are not provided, CSF products typically come with manufacturer-backed quality assurance to support performance and durability in Mazda CX-5 applications.

BrandCSF
Part Number3766
Core Thickness5/8
Core Width28 11/16
Core MaterialAluminum
Tank MaterialPlastic
Core Length16 7/8
Inlet Diameter1 5/16 left
Outlet Diameter1 5/16centre
Down Flow Or Cross Flow TypeDown flow
Radiator Core Row Quantity1
Cap IncludedNo
Box Height (in)6 1/4
Box Length (in)31 5/8
Box Weight (lbs)9
Box Width (in)24 1/8
Csf Cap Number4503
Hazardous MaterialNo
Inlet Length (in)29 1/2
Inlet Width (in)1 5/8
Outlet Length (in)29 1/2
Outlet Width (in)1 5/8
Tech NoteO.e.m. style plastic tanks & aluminum core.

This part fits 17 vehicles. Search below:

YearMakeModelLitersCylindersPositionNotes
2023MazdaCX-52.5LL4N/ANon-Turbo Models Only
2022MazdaCX-52.5LL4N/ANon-Turbo Models Only
2021MazdaCX-52.5LL4N/AOE Style Design; Non-Turbo Models Only
2020MazdaCX-52.5LL4N/AOE Style Design; Non-Turbo Models Only
2019MazdaCX-52.5LL4N/AOE Style Design; Non-Turbo Models Only
2019MazdaCX-52.0LL4N/AOE style design ensures optimal fitment and performance.
2018MazdaCX-52.0LL4N/AOE style design ensures optimal fitment and performance.
2018MazdaCX-52.5LL4N/AOE style design ensures optimal fitment and performance.
2017MazdaCX-52.5LL4N/AOE style design ensures optimal fitment and performance.
2017MazdaCX-52.0LL4N/AOE style design ensures optimal fitment and performance.
2016MazdaCX-52.5LL4N/AOE style design ensures optimal fitment and performance.
2016MazdaCX-52.0LL4N/AOE style design ensures optimal fitment and performance.
2015MazdaCX-52.5LL4N/AOE style design ensures optimal fitment and performance.
2015MazdaCX-52.0LL4N/AOE style design ensures optimal fitment and performance.
2014MazdaCX-52.0LL4N/AOE style design ensures optimal fitment and performance.
2014MazdaCX-52.5LL4N/AOE style design ensures optimal fitment and performance.
2013MazdaCX-52.0LL4N/AOE style design ensures optimal fitment and performance.

* 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:

133178013317CU13317MA3010240PE01 15 200APE01 15 200BPE0115200PYFW-15-200

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

Related Articles