Lenco 5-pole/5 lobe Power Wedge actuator that spans all models that used the Lenco actuators as the 3-pole models are no longer available.
Sold individually though often both need to be replaced -- when one malfunctions it can damage the other from the extra stress put on it. In that case, two will need to be ordered.
Typically speaking, Malibu used the 3-pole actuators on 2006-2011 models, the 5-pole actuators on 2012-2014 models, and the completely redesigned hydraulic actuators on 2015+ models.
While some have had success replacing 3-pole actuators with 5-pole actuators, Malibu recommends upgrading your power wedge control box as well if switching over from a 3-pole to 5-pole system.