Dunno your vehicle details, but the actuators are all inside the ABS unit and it's very unlikely that an actuator and speed sensor would fail at the same time. Chances are you've just had a sensor failure. To find the cheapest part, use the Nissan part number to search and not the make/model/year. You can get that from NissanPartsDeal.com by entering your VIN number. NPD uses the exact same database and diagrams as Nissan DPC, so you can be sure the p/n that shows up is the right one for your ride. Then you can use that p/n to search Rock Auto, eBay, Google, Kijiijii or anyplace else.