Description
Product overview
The CSF 3970 is an application-specific replacement radiator. Its construction pairs a aluminum core with plastic tanks. Application: 2020+ Toyota Highlander 3.5L V6 and 2.5L Hybrid.
The radiator transfers heat from circulating engine coolant to the air passing through its core. Tube and fin condition, fan operation, and the airflow path all affect the cooling system’s ability to reject heat.
Technical specifications
- Bottom Hose Fitting (in): 1 1/2 Right
- Core Length (in): 27 9/16
- Core Material: Aluminum
- Core Thickness (in): 5/8
- Core Width (in): 22 5/16
- Flow orientation: Cross Flow
- Core rows: 1
- Oil Cooler (in): No
- Radiator Cap Supplied: No
- Tank Material: Plastic
- Tech Note: O.E.M. style Plastic tank & Aluminum core. Upgraded with Higher Performance & Stronger B Tube Design
- Top Hose Fitting (in): 1 1/2 Left
Installation and compatibility
Compare the core dimensions, hose locations, mounting arrangement, and any internal cooler connections with the existing radiator. Select by the complete vehicle, engine, and transmission configuration; shared model names alone do not establish fitment. Follow the vehicle coolant filling and bleeding procedure after replacement.
Vehicle fitment
| Make | Model | Qualifiers | Year |
|---|---|---|---|
| Toyota | Grand Highlander | 2.5L L4 2487cc 152ci FULL HYBRID EV-GAS (FHEV) | 2024-2026 |
| Toyota | Highlander | 2.5L L4 2487cc 152ci FULL HYBRID EV-GAS (FHEV) | 2020-2025 |
| Toyota | Highlander | 3.5L V6 3456cc | 2020-2022 |
Part number: CSF 3970.