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CSF 3687 Radiator
| Brand | CSF 3687 |
|---|---|
| Box Height (in) | 6 7/16 |
| Box Length (in) | 33 |
| Box Weight (lbs) | 13 |
| Box Width (in) | 24 3/4 |
| Cap Included | No |
| Core Length | 17 11/16 |
| Core Material | Aluminum |
| Core Thickness | 7/8 |
| Core Width | 29 15/16 |
| Csf Cap Number | 4514 |
| Down Flow Or Cross Flow Type | Down Flow |
| Hazardous Material | No |
| Inlet Diameter | 1 3/8 Left |
| Inlet Length (in) | 31 |
| Inlet Width (in) | 1 5/8 |
| Oil Cooler (in) | 14 3/4 (high-efficiency Plate Type) |
| Outlet Diameter | 1 3/8 Right |
| Outlet Length (in) | 31 |
| 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 | Toyota and Lexus · 21 vehicles |
OE-style design. Plastic tanks and an aluminum core match the original construction.
Wind tunnel tested. Validated for cooling performance in lab testing.
1-row core. A single-row layout helps keep the radiator compact.
Cross-references APDI 8013207, BBB Industries 13548 and Bosch 13117 for the same application. See all 26.
OE-Style Radiator for Toyota and Lexus Applications
CSF 3687 is an OE-style radiator built with a plastic tank and aluminum core for direct replacement cooling performance. It is designed for select Toyota Sienna and Lexus RX350/RX450h applications, with fitment details that match the factory-style layout and hose locations.
Key Features
- 1-row radiator design with a plastic tank and aluminum core
- Down-flow configuration for OE-style cooling system layout
- Core thickness: 7/8 in.
- Core size: 29 15/16 in. wide by 17 11/16 in. long
- Inlet diameter: 1 3/8 in. left
- Outlet diameter: 1 3/8 in. right
- O.E.M. style plastic tanks and aluminum core construction
- CSF part number 3687
Product Details
CSF’s 1 Row Plastic Tank Aluminum Core line focuses on OE-style replacement radiators built to factory-style dimensions and cooling layouts. CSF states its radiators are engineered and wind tunnel tested for cooling performance validation, and the brand has supplied radiators worldwide for decades across a broad range of vehicle applications. This CSF 3687 radiator is a direct-fit style solution for 2011-2016 Toyota Sienna, 2010-2015 Lexus RX350, and 2010-2015 Lexus RX450h models that use the specified down-flow configuration.
This part cross-references Spectra Premium CU13116 and CU13117 for the same application.
What This Radiator Helps Address
- Overheating caused by a leaking or restricted radiator core
- Coolant loss from cracked or aged plastic tanks
- Reduced heat transfer from a worn aluminum core
- Temperature instability in daily driving or stop-and-go traffic
- Cooling system service needs on Toyota Sienna and Lexus RX models
Installation Notes and Tips
- Verify vehicle fitment by year, make, model, and cooling system layout before installation.
- Use the correct 16 psi Micro cap specified in the fitment notes when required by the vehicle application.
- Inspect hoses, clamps, and the cooling fan system before installing the new radiator.
- Flush the cooling system if contamination, rust, or debris is present.
- Confirm inlet and outlet orientation matches the factory routing: inlet left, outlet right.
Quality Assurance
CSF manufactures radiators to high-performance standards and produces a wide range of OE-style cooling components for global vehicle coverage. The brand notes ISO/TSO-certified factory production and validation testing used to confirm cooling performance.
| Year | Make | Model | Liters | Cylinders | Position | Notes |
|---|---|---|---|---|---|---|
| 2016 | Toyota | Sienna | 3.5L | V6 | N/A | OE Style Design; Use Micro, 16 psi Cap; 1 Row Plastic Tank Aluminum Core |
| 2015 | Lexus | RX350 | 3.5L | V6 | N/A | OE Style Design; Use Micro, 16 psi Cap; 1 Row Plastic Tank Aluminum Core |
| 2015 | Lexus | RX450h | 3.5L | V6 | N/A | OE Style Design; Main Radiator; Use Micro, 16 psi Cap; 1 Row Plastic Tank Aluminum Core |
| 2015 | Toyota | Sienna | 3.5L | V6 | N/A | OE Style Design; Use Micro, 16 psi Cap; 1 Row Plastic Tank Aluminum Core |
| 2014 | Lexus | RX350 | 3.5L | V6 | N/A | OE Style Design; Use Micro, 16 psi Cap; 1 Row Plastic Tank Aluminum Core |
| 2014 | Lexus | RX450h | 3.5L | V6 | N/A | OE Style Design; Main Radiator; Use Micro, 16 psi Cap; 1 Row Plastic Tank Aluminum Core |
| 2014 | Toyota | Sienna | 3.5L | V6 | N/A | OE Style Design; Use Micro, 16 psi Cap; 1 Row Plastic Tank Aluminum Core |
| 2013 | Lexus | RX350 | 3.5L | V6 | N/A | OE Style Design; Use Micro, 16 psi Cap; 1 Row Plastic Tank Aluminum Core |
| 2013 | Lexus | RX450h | 3.5L | V6 | N/A | OE Style Design; Main Radiator; Use Micro, 16 psi Cap; 1 Row Plastic Tank Aluminum Core |
| 2013 | Toyota | Sienna | 3.5L | V6 | N/A | OE Style Design; Use Micro, 16 psi Cap; 1 Row Plastic Tank Aluminum Core |
| 2013 | Toyota | Sienna | 2.7L | L4 | N/A | OE Style Design; Use Micro, 16 psi Cap; 1 Row Plastic Tank Aluminum Core |
| 2012 | Lexus | RX350 | 3.5L | V6 | N/A | OE Style Design; Use Micro, 16 psi Cap; 1 Row Plastic Tank Aluminum Core |
| 2012 | Lexus | RX450h | 3.5L | V6 | N/A | OE Style Design; Main Radiator; Use Micro, 16 psi Cap; 1 Row Plastic Tank Aluminum Core |
| 2012 | Toyota | Sienna | 3.5L | V6 | N/A | OE Style Design; Use Micro, 16 psi Cap; 1 Row Plastic Tank Aluminum Core |
| 2012 | Toyota | Sienna | 2.7L | L4 | N/A | OE Style Design; Use Micro, 16 psi Cap; 1 Row Plastic Tank Aluminum Core |
| 2011 | Lexus | RX350 | 3.5L | V6 | N/A | OE Style Design; Use Micro, 16 psi Cap; 1 Row Plastic Tank Aluminum Core |
| 2011 | Lexus | RX450h | 3.5L | V6 | N/A | OE Style Design; Main Radiator; Use Micro, 16 psi Cap; 1 Row Plastic Tank Aluminum Core |
| 2011 | Toyota | Sienna | 3.5L | V6 | N/A | OE Style Design; Use Micro, 16 psi Cap; 1 Row Plastic Tank Aluminum Core |
| 2011 | Toyota | Sienna | 2.7L | L4 | N/A | OE Style Design; Use Micro, 16 psi Cap; 1 Row Plastic Tank Aluminum Core |
| 2010 | Lexus | RX350 | 3.5L | V6 | N/A | OE Style Design; Use Micro, 16 psi Cap; 1 Row Plastic Tank Aluminum Core |
| 2010 | Lexus | RX450h | 3.5L | V6 | N/A | OE Style Design; Main Radiator; Use Micro, 16 psi Cap; 1 Row Plastic Tank Aluminum Core |
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