CSF 3971
CSF part number 3971 is a inverter cooler in the Cooling System system. This catalog matches it to 119 year-and-engine configurations from 2019 to 2026.
Verified fitment includes 2026 Toyota Grand Highlander 2.5L L4 ELECTRIC/GAS ; 2025 Ford F-150 2.7L V6 Turbocharged ; 2025 Ford F-150 3.5L V6 ELECTRIC/GAS Turbocharged ; 2025 Ford F-150 3.5L V6 Turbocharged ; 2025 Ford F-150 5.0L V8 , plus 114 other configurations. See every vehicle this part fits.
Frequently Asked Questions
What is CSF 3971?
CSF part number 3971 is a inverter cooler with published application data for 119 vehicle configurations from 2019 to 2026. Use the manufacturer part number to cross-reference your old part or a repair quote before you order.
Which vehicles does CSF 3971 fit?
This catalog matches 3971 to 119 year-and-engine configurations from 2019 to 2026. Open the compatible-vehicles list for every make, model and engine, and read the notes for position or trim qualifiers.
Is CSF 3971 OEM or aftermarket?
What matters is the published application data for this part number, not the label on the box. CSF 3971 is listed with its manufacturer part number so you can compare it to an OEM number or another brand that covers the same fitment.
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