Which heat sink fits the HP ProBook 645 G1? OEM part numbers

2 heat sinks are documented for the HP ProBook 645 G1: 738393-001, 738686-001. 2 of 2 come from OEM documentation (h10032.www1.hp.com); last checked 2026-11-04. Not bench-tested: match the number on your old heat sink and any constraint before ordering.

Part number	Part	Constraints	Confidence	Last checked
738393-001	HP heat sink 738393-001	HP description: "Heat sink, discrete graphics". OEM documentation only; not bench-tested.	OEM documented	2026-11-04
738686-001	HP heat sink 738686-001	HP description: "Heat sink, Intel UMA graphics". OEM documentation only; not bench-tested.	OEM documented	2026-11-04

Where do these HP ProBook 645 G1 heat sink part numbers come from?

2 of 2 fits are from OEM documentation (h10032.www1.hp.com); each row links its source. Last checked 2026-11-04.

Are these heat sinks tested in the HP ProBook 645 G1?

No. Fits come from manufacturer or retailer documentation and are not bench-tested. Check the part number on your old part and any listed constraint.

All documented parts for the HP ProBook 645 G1.

Other parts for the HP ProBook 645 G1

Service Part (48) · Keyboard (198) · Speakers (1) · Touchpad (10) · Fan (2) · Cable (3) · Bottom Cover (2) · Power Adapter (9) · Wireless Card (5) · Hard Drive (17) · RTC Battery (1) · Battery (4) · Camera (1) · Microphone (1) · SSD (16) · Display Cable (4) · Power Cord (16) · Screw Kit (1) · Memory (4) · Motherboard (70) · Display Bezel (6) · Hinge (1) · Screen (14) · Card Reader (3) · Service Door (4) · Hinge Cover (1)

For AI agents: the same list as JSON from the free MCP server at /mcp (tool get_model_parts, model hp-probook-645-g1) or the keyless JSON API.