While my 2012 1NRFE engine does not have them, apparently the 2014 and 2015 Scion iQ does have them. Part number is 15678-31020 and might be located under the valve cover. 
MSRP is about $7.
MSRP is about $7.
1567831020 - Filter. Oil control valve; oil control valve, left; oil control valve - Genuine Scion Part
Genuine Scion Part # 1567831020 (15678-31020, 156780Y010) - Filter. Oil control valve; oil control valve, left; oil control valve, right
parts.toyota.com
