The obstacles faced by the quality of service of PT. Wahana Logistik Pasuruan are still considered less than in accordance with consumer expectations, such as product management that is often problematic at the transit point, delays in delivery of goods, and the length of service from customer service in handling consumer complaints. The purpose of this study is to determine the attributes that influence service quality and determine the root of the problem regarding service quality at PT. Wahana Logistik Pasuruan. The servqual method will address service quality issues from the customer's perspective. The RCA method will be used to find out why the problem exists by focusing on the underlying causes. There are two main factors that contribute to the failure to meet consumer expectations, namely reliability (one attribute) and tangible (three attributes).