Pick the brand
The brand is printed on the same plate as the model number.
Parts that come up most
The part numbers listed for the most microwaves in the index. Open one to see every model it fits.

W10211972Switch110 microwaves
W11707984Fuse65 microwaves
W10269458Door interlock switch36 microwaves
WPW10156813Interlock33 microwaves
WB06X10128Door interlock switch lever29 microwaves
W10850446Capacitor28 microwaves
WPW10466420Turntable motor27 microwaves
WB27X10170Vent motor capacitor25 microwaves
W10211974Door interlock switch24 microwaves
WB26X10037Stirrer fan motor19 microwaves
WB27X10195Thermal cut-off18 microwaves
WB27X10011High-voltage capacitor17 microwavesWhere the model number is
On microwaves, the plate or sticker sits in one of a few places.
Microwaves: Open the door: the label is on the frame. Over-the-range models: sometimes behind the vent grille.