Objective: To describe a series of six cochlear implant (CI) patients with an extraordinary peak in transimpedances., Study Design: Retrospective case series., Setting: Tertiary referral center., Participants: Six adult CI patients who underwent transimpedance measurements and postoperative imaging., Main Outcome Measure: Intra- and postoperative transimpedance measurements and a visual inspection of transimpedance matrices (TIMs). The position of electrodes was radiologically identified., Results: From six patients with TIMs showing an extraordinary peak in the off-diagonal area, five C electrode arrays showed no correct scalar localization in the scala tympani, and one had a correct scalar localization in the scala tympani., Conclusions: A peaking transimpedance might be a marker for scalar dislocation in CIs., (S. Karger AG, Basel.)