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CSF 3859 Radiator
| Brand | CSF 3859 |
|---|---|
| Core Thickness | 5/8 |
| Core Width | 14 5/16 |
| Core Material | Aluminum |
| Tank Material | Plastic |
| Core Length | 23 5/8 |
| Inlet Diameter | 1 3/8 left |
| Outlet Diameter | 1 3/8 right |
| Down Flow Or Cross Flow Type | Cross flow |
| Box Height (in) | 6 5/8 |
| Box Length (in) | 30 1/4 |
| Box Weight (lbs) | 7 |
| Box Width (in) | 19 3/16 |
| Hazardous Material | No |
| Inlet Length (in) | 14 15/16 |
| Inlet Width (in) | 1 3/16 |
| No. Of Rows | 1 |
| Oil Cooler (in) | No |
| Outlet Length (in) | 14 15/16 |
| Outlet Width (in) | 1 3/16 |
| Radiator Cap Supplied | No |
| Tech Note | O.e.m. style plastic tanks & aluminum core. upgraded with higher |
| Fits | Toyota · 11 vehicles |
OE-style replacement. Plastic tanks and aluminum core match the original design.
Cross-flow design. Helps promote efficient coolant flow through the radiator.
B-tube construction. Upgraded for stronger performance and improved heat transfer.
Cross-references Bosch 13666, Partslink Numbering System TO3010367 and Spectra Premium CU13666 for the same application. See all 7.
OE-Style Radiator for Toyota Cooling Systems
CSF 3859 is an OE-style radiator built with a plastic tank and aluminum core layout for direct replacement service on select Toyota applications. It uses a cross-flow design with a 5/8-inch core thickness and upgraded B-tube construction for improved heat transfer and durability.
Compatible with 2022-2025 Toyota Corolla and 2018-2022 Toyota C-HR applications, this radiator is built around factory-style dimensions and hose connections for straightforward fitment. The CSF 3859 also cross-references Bosch 13666 for the same application.
Key Features
- OE-style plastic tank and aluminum core construction
- Cross-flow radiator design
- 5/8-inch core thickness with one-row core layout
- Left inlet and right outlet configuration
- Upgraded B-tube core design for improved performance and strength
- Direct-fit dimensions for select Toyota Corolla and Toyota C-HR models
Detailed Description
The CSF 3859 radiator is engineered as a factory-style replacement for Toyota cooling systems that use a cross-flow layout. Core dimensions measure 23 5/8 inches long and 14 5/16 inches wide, with 1 3/8-inch inlet and outlet diameters positioned left and right respectively. The aluminum core and plastic tank combination follows OE-style construction while the upgraded B-tube design adds a stronger internal structure for heat exchange performance.
This radiator fits 2022-2025 Toyota Corolla, N/A; 2022 Toyota C-HR, N/A; 2018-2021 Toyota C-HR, N/A; and 2020-2021 Toyota Corolla, N/A. It is also referenced by part numbers 16400-0T350 and TO3010367 in related catalog systems.
Common Cooling Issues This Radiator Addresses
- Cracked or leaking radiator tanks
- Restricted coolant flow from an aging core
- Overheating caused by reduced heat dissipation
- Corrosion or wear in an original radiator assembly
- Cooling system service needs on Toyota Corolla and Toyota C-HR models
Installation Notes and Tips
Verify inlet and outlet orientation before installation, since this unit uses a left inlet and right outlet layout. Confirm radiator dimensions, hose routing, and mounting points against the original part before removal. After installation, refill the cooling system with the correct coolant specification and bleed air from the system according to Toyota service procedures.
Quality Assurance
CSF 3859 uses OE-style plastic tanks and an aluminum core with an upgraded B-tube design for added structural strength and thermal efficiency. The part is built for direct replacement use in the listed Toyota applications and is not marked as hazardous material.
| Year | Make | Model | Liters | Cylinders | Fuel Type | Position | Notes |
|---|---|---|---|---|---|---|---|
| 2025 | Toyota | Corolla | 1.8L | L4 | GAS | N/A | Upgraded with Higher Performance & Stronger B-Tube Design |
| 2024 | Toyota | Corolla | 1.8L | L4 | GAS | N/A | Upgraded with Higher Performance & Stronger B-Tube Design |
| 2023 | Toyota | Corolla | 1.8L | L4 | GAS | N/A | Upgraded with Higher Performance & Stronger B-Tube Design |
| 2022 | Toyota | C-HR | 2.0L | L4 | — | N/A | Upgraded with Higher Performance & Stronger B-Tube Design |
| 2022 | Toyota | Corolla | 1.8L | L4 | GAS | N/A | Upgraded with Higher Performance & Stronger B-Tube Design |
| 2021 | Toyota | C-HR | 2.0L | L4 | — | N/A | OE style design ensures optimal fitment and performance. |
| 2021 | Toyota | Corolla | 1.8L | L4 | GAS | N/A | OE Style Design; Japan Built |
| 2020 | Toyota | C-HR | 2.0L | L4 | — | N/A | OE style design ensures optimal fitment and performance. |
| 2020 | Toyota | Corolla | 1.8L | L4 | GAS | N/A | OE Style Design; Japan Built |
| 2019 | Toyota | C-HR | 2.0L | L4 | — | N/A | OE style design ensures optimal fitment and performance. |
| 2018 | Toyota | C-HR | 2.0L | L4 | — | N/A | OE style design ensures optimal fitment and performance. |
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