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Improper child passenger restraint use contributes to higher pediatric motor vehicle collision morbidity and mortality among cultural minority populations. Child passenger safety education improves caregiver knowledge of restraint use, but effective interventions require culturally specific programming. The purpose of this study was to evaluate the effectiveness of a child passenger safety education program culturally adapted through a pediatric trauma center's community partnerships. A nonexperimental observational cohort study using program evaluation data for the child passenger safety education programs during a 24-month period. Paired pretest/posttest self-reported survey responses measured changes in caregiver knowledge and self-efficacy of restraint use. Data were analyzed by class location and by caregiver language using a paired t test and Wilcoxon's signed ranks test. A total of 1,795 paired survey responses were collected in English, Spanish, or Russian. An increase in mean knowledge scores occurred overall, with a difference in mean of 0.565 (SE = 0.022, 95% CI [0.521, 0.607]). Stratification by class site and by language reflected significant increases in median scores, but findings were variable by study group. Pretest median scores for self-efficacy of restraint use were high for all groups, but the increases in posttest medians were also significant across groups (p ≤ .001). Caregiver knowledge and self-efficacy for child passenger restraint use increased after participation in the community classes. The pediatric trauma center's community partnerships facilitated uptake and adaption of the child passenger safety education programs and increased the injury prevention outreach to minority communities.