Wilder finished with 9-of-13 shooting from the field including 5 of 5 from distance for the Broncos (9-12, 3-5 Mid-American). Tucker Haymond added 21 points and six rebounds and Anthony Avery Jr. had 11 points and five rebounds.
Western Michigan took the lead early in the first half and never relinquished it on its way to a 41-24 advantage at the break.
Wilder sank four 3-pointers in the second half, helping the Broncos to extend their lead to 83-71 with 3:01 to play. Eastern Michigan closed the gap to 86-79 with 1:14 remaining but Wilder, Haymond and Drake LaMont combined for eight free throws after that to keep the Broncos on top.
Ty Toney scored 23 points with four rebounds for the Eagles (10-11, 2-6).