JD Power has released its annual Initial Quality Study. The study measures how many problems per 100 vehicles each brand averages. The industry average is 112 issues per 100 vehicles. Scion ranked below average and close to the bottom with 124 issues per 100 vehicles.
Auto Guide has this to say of Scion:
Still, Scion didn't do that terribly when you consider brands like Fiat and smart which have 161 issues and 154 issues per 100 vehicles and rank at the very bottom of the study.
Everything You Need to Know About the 2015 J.D. Power Initial Quality Study » AutoGuide.com News
Auto Guide has this to say of Scion:
Another sub-brand that struggles despite having a strong parent brand is Scion. With 124 problems reported per 100 vehicles, Scion lands in the ninth position, but improves significantly compared to last year’s 140 problems and fourth place finish. Toyota, which is Scion’s parent brand, is ranked above the industry average of 112 problems with an initial quality of 104.

Still, Scion didn't do that terribly when you consider brands like Fiat and smart which have 161 issues and 154 issues per 100 vehicles and rank at the very bottom of the study.
Everything You Need to Know About the 2015 J.D. Power Initial Quality Study » AutoGuide.com News