Which hard drive fits the HP ProBook 645 G1? OEM part numbers

17 hard drives are documented for the HP ProBook 645 G1: 603783-001, 634862-001, 683801-001, 686850-001, 703267-001 and 12 more. 11 of 17 come from OEM documentation (h10032.www1.hp.com); last checked 2026-11-12. Not bench-tested: match the number on your old hard drive and any constraint before ordering.

Part number	Part	Constraints	Confidence	Last checked
603783-001	HP Hard drive, 320-GB 7200-rpm, 9.5-mm 603783-001	HP description: "Hard drive, 320-GB 7200-rpm, 9.5-mm". OEM documentation only; not bench-tested.	OEM documented	2026-11-04
634862-001	HP Hard drive 320-GB 7200-rpm SATA 7.0-mm 634862-001	HP description: "Hard drive, 320-GB 720000-rpm, 7.0-mm". OEM documentation only; not bench-tested.	OEM documented	2026-11-04
683801-001	HP Hard drive, 500-GB 7200-rpm, 7.0-mm SED 683801-001	HP description: "Hard drive, 500-GB 7200-rpm, 7.0-mm SED". OEM documentation only; not bench-tested.	OEM documented	2026-11-04
686850-001	HP Hard Drive 686850-001	OEM documentation only; not bench-tested.	Mostly documented (90–99%)	2026-11-12
703267-001	HP 500 GB 7200 rpm 7 mm hard drive 703267-001	HP description: "Hard drive, 500-GB 7200-rpm, 7.0-mm". OEM documentation only; not bench-tested.	OEM documented	2026-11-04
703268-001	HP Hard drive, 500-GB 7200-rpm SATA 7.0-mm 703268-001	HP description: "Hard drive, 500-GB 7200-rpm, 7.0-mm SED". OEM documentation only; not bench-tested.	OEM documented	2026-11-04
730946-001	HP Hard drive 500-GB 5400-rpm FIPS 7.0-mm 730946-001	HP description: "Hard drive, 500-GB 5400-rpm, 7.0-mm FIPS". OEM documentation only; not bench-tested.	OEM documented	2026-11-04
738395-001	HP Hard drive hardware kit with bracket and screws 738395-001	HP description: "Hard drive hardware kit with bracket and screws". OEM documentation only; not bench-tested.	OEM documented	2026-11-04
766644-001	HP Hard drive, 1-TB 7200-rpm SATA 9.5-mm 766644-001	OEM documentation only; not bench-tested.	Mostly documented (90–99%)	2026-11-12
778186-001	HP Hard drive, 500-GB 5400-rpm, 7.0-mm 778186-001	HP description: "Hard drive, 500-GB 5400-rpm, 7.0-mm". OEM documentation only; not bench-tested.	OEM documented	2026-11-04
778188-001	HP Hard drive, 500-GB 5400-rpm, 9.5-mm 778188-001	OEM documentation only; not bench-tested.	Mostly documented (90–99%)	2026-11-12
778189-001	HP Hard drive, 500 GB, 7200 rpm, 7 mm 778189-001	OEM documentation only; not bench-tested.	Mostly documented (90–99%)	2026-11-12
778191-001	HP Hard drive, 750-GB 7200-rpm, 9.5-mm 778191-001	HP description: "Hard drive, 750-GB 7200-rpm, 9.5-mm". OEM documentation only; not bench-tested.	OEM documented	2026-11-04
778192-001	HP Hard drive, 1-TB 5400-rpm, 9.5-mm 778192-001	HP description: "Hard drive, 1-TB 5400-rpm, 9.5-mm". OEM documentation only; not bench-tested.	OEM documented	2026-11-04
812618-001	HP Hard drive, 500-GB 5400-rpm SATA FIPS 7.0-mm 812618-001	HP description: "Hard drive, 500-GB 5400-rpm, 7.0-mm FIPS". OEM documentation only; not bench-tested.	OEM documented	2026-11-04
817631-001	HP Hard drive, 500-GB 7200-rpm, 7.0-mm locked 817631-001	OEM documentation only; not bench-tested.	Mostly documented (90–99%)	2026-11-12
835495-001	HP Hard drive, 500-GB 5400-rpm, 7.0-mm locked 835495-001	OEM documentation only; not bench-tested.	Mostly documented (90–99%)	2026-11-12

Where do these HP ProBook 645 G1 hard drive part numbers come from?

11 of 17 fits are from OEM documentation (h10032.www1.hp.com); each row links its source. Last checked 2026-11-12.

Are these hard drives 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) · Heat Sink (2) · Cable (3) · Bottom Cover (2) · Power Adapter (9) · Wireless Card (5) · 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.