The present study examined whether the cognitive behavioral program EQUIP for incarcerated youth would reduce recidivism and whether higher levels of program integrity - the extent to which a program is implemented as intended - would strengthen the effectiveness of EQUIP on recidivism. Program integrity was measured using a multifaceted program integrity instrument assessing the level of exposure, adherence, participant responsiveness, and quality of delivery. Participants (N = 133) were recruited from five juvenile correctional facilities in the Netherlands. The EQUIP program was implemented with low to moderate levels of program integrity (M = 54%). No differences were found between the experimental and control group in the prevalence, frequency, and seriousness of recidivism. In addition, within the experimental group, program integrity did not strengthen the effectiveness of EQUIP on the prevalence, frequency, and seriousness of recidivism. With these low-to-moderate levels of program integrity EQUIP did not reduce recidivism.