Which motherboard fits the Lenovo IdeaPad Flex 5 14ARE05? OEM part numbers

6 motherboards are documented for the Lenovo IdeaPad Flex 5 14ARE05: 5B21B44605, 5B21B44606, 5B21B44607, 5B21B44608, 5B21B44609 and 1 more. 6 of 6 come from OEM documentation (pcsupport.lenovo.com); last checked 2026-11-04. Not bench-tested: match the number on your old motherboard and any constraint before ordering.

Part number	Part	Constraints	Confidence	Last checked
5B21B44605	Lenovo System board, 81X2, WIN, R54500U, UMA 8G 5B21B44605	Lenovo description: "System board, 81X2, WIN, R54500U, UMA 8G". OEM documentation only; not bench-tested.	OEM documented	2026-11-04
5B21B44606	Lenovo System board, 81X2, WIN, R34300U, UMA 4G 5B21B44606	Lenovo description: "System board, 81X2, WIN, R34300U, UMA 4G". OEM documentation only; not bench-tested.	OEM documented	2026-11-04
5B21B44607	Lenovo System board, 81X2, WIN, R34300U, UMA 8G 5B21B44607	Lenovo description: "System board, 81X2, WIN, R34300U, UMA 8G". OEM documentation only; not bench-tested.	OEM documented	2026-11-04
5B21B44608	Lenovo System board, 81X2, WIN, R74700U, UMA 8G 5B21B44608	Lenovo description: "System board, 81X2, WIN, R74700U, UMA 8G". OEM documentation only; not bench-tested.	OEM documented	2026-11-04
5B21B44609	Lenovo Lenovo BDPLANAR MB W 81X2 WIN R54500U UMA16GNEW 5B21B44609	Lenovo description: "Lenovo BDPLANAR MB W 81X2 WIN R54500U UMA16GNEW". OEM documentation only; not bench-tested.	OEM documented	2026-11-04
5B21B44610	Lenovo Lenovo BDPLANAR MB W 81X2 WIN R74700U UMA16GNEW 5B21B44610	Lenovo description: "Lenovo BDPLANAR MB W 81X2 WIN R74700U UMA16GNEW". OEM documentation only; not bench-tested.	OEM documented	2026-11-04

Where do these Lenovo IdeaPad Flex 5 14ARE05 motherboard part numbers come from?

6 of 6 fits are from OEM documentation (pcsupport.lenovo.com); each row links its source. Last checked 2026-11-04.

Are these motherboards tested in the Lenovo IdeaPad Flex 5 14ARE05?

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 IdeaPad Flex 5 14ARE05.

Other parts for the IdeaPad Flex 5 14ARE05

Screw Kit (1) · Keyboard (378) · Screen (5) · Power Cord (36) · Service Part (118) · Stylus (2) · Power Adapter (31) · Cable (4) · Display Cable (1) · Touchpad (3) · SSD (26) · Wireless Card (2) · Fan (1) · Hinge (3) · I/O Board (1) · Battery (4) · Display Back Cover (3) · Bracket (2) · Camera (1) · Heat Sink (1) · Speakers (1)

For AI agents: the same list as JSON from the free MCP server at /mcp (tool get_model_parts, model lenovo-ideapad-flex-5-14are05) or the keyless JSON API.