Which motherboard fits the Lenovo IdeaPad Flex 5 14IIL05? OEM part numbers

10 motherboards are documented for the Lenovo IdeaPad Flex 5 14IIL05: 5B21B26517, 5B21B26519, 5B21B26521, 5B21B26523, 5B21B26525 and 5 more. 10 of 10 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
5B21B26517	Lenovo Lenovo BDPLANAR MB 81X1 WIN I31005G1 U 4G 5B21B26517	Lenovo description: "Lenovo BDPLANAR MB 81X1 WIN I31005G1 U 4G". OEM documentation only; not bench-tested.	OEM documented	2026-11-04
5B21B26519	Lenovo Lenovo BDPLANAR MB 81X1 WIN I31005G1 U 8G 5B21B26519	Lenovo description: "Lenovo BDPLANAR MB 81X1 WIN I31005G1 U 8G". OEM documentation only; not bench-tested.	OEM documented	2026-11-04
5B21B26521	Lenovo Lenovo BDPLANAR MB 81X1 WIN I51035G1 U 8G 5B21B26521	Lenovo description: "Lenovo BDPLANAR MB 81X1 WIN I51035G1 U 8G". OEM documentation only; not bench-tested.	OEM documented	2026-11-04
5B21B26523	Lenovo Lenovo BDPLANAR MB 81X1 WIN I71065G7 U 8G 5B21B26523	Lenovo description: "Lenovo BDPLANAR MB 81X1 WIN I71065G7 U 8G". OEM documentation only; not bench-tested.	OEM documented	2026-11-04
5B21B26525	Lenovo MB W 81X1 WIN I51035G1 D 8G NEW 5B21B26525	Lenovo description: "MB W 81X1 WIN I51035G1 D 8G NEW". OEM documentation only; not bench-tested.	OEM documented	2026-11-04
5B21B26527	Lenovo MB W 81X1 WIN I71065G7 D 8G NEW 5B21B26527	Lenovo description: "MB W 81X1 WIN I71065G7 D 8G NEW". OEM documentation only; not bench-tested.	OEM documented	2026-11-04
5B21B26529	Lenovo Lenovo BDPLANAR MB 81X1 WIN I71065G7 D 16G 5B21B26529	Lenovo description: "Lenovo BDPLANAR MB 81X1 WIN I71065G7 D 16G". OEM documentation only; not bench-tested.	OEM documented	2026-11-04
5B21B26531	Lenovo Lenovo BDPLANAR MB 81X1 WIN I51035G1 U 16G 5B21B26531	Lenovo description: "Lenovo BDPLANAR MB 81X1 WIN I51035G1 U 16G". OEM documentation only; not bench-tested.	OEM documented	2026-11-04
5B21B26533	Lenovo MB W 81X1 WIN I51035G1 D 16GNEW 5B21B26533	Lenovo description: "MB W 81X1 WIN I51035G1 D 16GNEW". OEM documentation only; not bench-tested.	OEM documented	2026-11-04
5B21B26535	Lenovo MB W 81X1 WIN I71065G7 U 16GNEW 5B21B26535	Lenovo description: "MB W 81X1 WIN I71065G7 U 16GNEW". OEM documentation only; not bench-tested.	OEM documented	2026-11-04

Where do these Lenovo IdeaPad Flex 5 14IIL05 motherboard part numbers come from?

10 of 10 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 14IIL05?

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 14IIL05.

Other parts for the IdeaPad Flex 5 14IIL05

Service Part (226) · Screw Kit (1) · Keyboard (378) · Screen (5) · Power Cord (36) · Stylus (2) · Wireless Card (2) · Power Adapter (32) · Cable (4) · Display Cable (1) · Touchpad (3) · SSD (21) · Fan (1) · Hinge (3) · I/O Board (1) · Battery (4) · Display Back Cover (6) · Bracket (2) · Heat Sink (2) · Camera (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-5-14iil05) or the keyless JSON API.