Lenovo 04X4157 CPU Heatsink and Fan Assembly for ThinkPad T440 T440S T450 T450S

Overheating can cause performance throttling, unexpected shutdowns, and long-term damage to your laptop's processor. The Lenovo 04X4157 heatsink and fan assembly is the direct replacement cooling module for ThinkPad T440, T440S, T450, and T450S models, restoring proper thermal management.

Who is it for

This component is for technicians and IT departments servicing Lenovo ThinkPad T440, T440S, T450, or T450S laptops that exhibit overheating, fan noise, or fan failure. It replaces the original cooling assembly with a new unit.

Main features

• Combines a copper heat pipe, aluminum fins, and a DC brushless fan for active CPU cooling.
• Designed as a direct replacement for the specified ThinkPad models, with screw-in mounting.
• Fan connects via a 4-pin header, rated at DC 5V and 0.28A.
• Does not include thermal paste; apply new thermal interface material during installation.

Specifications

• Component type: CPU heatsink and fan assembly
• Compatibility: Lenovo ThinkPad T440, T440S, T450, T450S
• Cooling method: Active (fan) and passive (heatsink)
• Heatsink material: Copper heat pipes, aluminum fins
• Number of heat pipes: 1
• Fan type: DC brushless
• Fan connector: 4-pin
• Rated voltage: DC 5V
• Rated current: 0.28A
• Mounting type: Screw-in
• FRU part number: 04X4157
• Condition: New
• Thermal paste: Not included

Tips

Before installation, clean the CPU die and apply a small amount of high-quality thermal paste. Ensure the fan connector is properly seated and the heatsink screws are tightened in a diagonal pattern to avoid uneven pressure.