OE Quality
60-Day Returns

CSF 3891 Radiator
Overview of CSF Radiator for Nissan Altima
The CSF radiator part number 3891 is designed specifically for Nissan Altima models, providing reliable cooling performance. Featuring a durable aluminum core and plastic tanks, this radiator supports efficient heat dissipation to maintain optimal engine temperature.
- Core thickness: 1 1/4 inches
- Core width: 15 5/8 inches
- Core length: 28 3/8 inches
- Aluminum core material with plastic tanks
- Cross flow design for effective coolant circulation
- Inlet and outlet diameter: 1 3/8 inches (right inlet, left outlet)
- Single-row radiator core
- Includes high-efficiency plate type oil cooler (10 7/16 inches)
Detailed Product Description
The CSF 3891 radiator is engineered with an aluminum core that measures 1 1/4 inches thick, 15 5/8 inches wide, and 28 3/8 inches long, ensuring sufficient surface area for heat exchange. The plastic tanks are designed to match OEM specifications, providing a balance of durability and weight savings. This radiator features a cross flow design, which promotes efficient coolant flow from the right-side inlet to the left-side outlet, both measuring 1 3/8 inches in diameter. The single-row core construction supports consistent cooling performance, while the integrated high-efficiency plate type oil cooler enhances engine oil temperature regulation.
Compatible Vehicles and Applications
- Compatible with Nissan Altima models requiring a cross flow radiator
- Replaces OEM radiators with plastic tanks and aluminum cores
- Suitable for vehicles experiencing overheating or coolant leaks
- Ideal for restoring factory cooling system performance
Installation Notes and Tips
When installing the CSF radiator 3891, ensure all coolant hoses match the 1 3/8 inch inlet and outlet diameters. Verify the radiator core dimensions fit within the engine bay, especially the 28 3/8 inch length and 15 5/8 inch width. Since the radiator does not include a cap, reuse the existing OEM cap or source a compatible replacement. Properly bleed the cooling system after installation to prevent air pockets and ensure optimal coolant flow.
Quality Assurance and Warranty
CSF radiators are manufactured to meet OEM standards, using high-quality aluminum cores and plastic tanks for durability and corrosion resistance. This radiator is free of hazardous materials and designed for long-term service. While specific warranty details are not provided, CSF products typically come with manufacturer-backed quality assurance to support reliable operation in Nissan Altima vehicles.
| Brand | CSF |
| Part Number | 3891 |
| Core Thickness | 1 1/4 |
| Core Width | 15 5/8 |
| Core Material | Aluminum |
| Tank Material | Plastic |
| Core Length | 28 3/8 |
| Inlet Diameter | 1 3/8 right |
| Outlet Diameter | 1 3/8 left |
| Down Flow Or Cross Flow Type | Cross flow |
| Radiator Core Row Quantity | 1 |
| Cap Included | No |
| Box Height (in) | 6 1/4 |
| Box Length (in) | 37 9/16 |
| Box Weight (lbs) | 12 |
| Box Width (in) | 24 15/16 |
| Hazardous Material | No |
| Inlet Length (in) | 16 1/8 |
| Inlet Width (in) | 1 5/8 |
| Oil Cooler (in) | 10 7/16 (high-efficiency plate type) |
| Outlet Length (in) | 16 1/8 |
| Outlet Width (in) | 1 5/8 |
| Tech Note | O.e.m. style plastic tank & aluminum core. |
This part fits 6 vehicles. Search below:
| Year | Make | Model | Liters | Cylinders | Position | Notes |
|---|---|---|---|---|---|---|
| 2024 | Nissan | Altima | 2.0L | L4 | N/A | Upgraded Heavy Duty Core. 11% Thicker 30mm vs OEM 27mm |
| 2023 | Nissan | Altima | 2.0L | L4 | N/A | Upgraded Heavy Duty Core. 11% Thicker 30mm vs OEM 27mm |
| 2022 | Nissan | Altima | 2.0L | L4 | N/A | Upgraded Heavy Duty Core. 11% Thicker 30mm vs OEM 27mm |
| 2021 | Nissan | Altima | 2.0L | L4 | N/A | Upgraded Heavy Duty Core. 11% Thicker 30mm vs OEM 27mm |
| 2020 | Nissan | Altima | 2.0L | L4 | N/A | Upgraded Heavy Duty Core. 11% Thicker 30mm vs OEM 27mm |
| 2019 | Nissan | Altima | 2.0L | L4 | N/A | OE 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:
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.