| 2010-2021 Western Star 4900EX Water Pump - Replacement Western Star 4900EX Water Pump. Brand: Replacement. Fits Years: 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020, 2021, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21. Engine Water Pump -- 15.6L 6-Cylinder Diesel; Variable Speed; Belt... ... more 2010-2021 Western Star 4900EX Water Pump - Replacement Western Star 4900EX Water Pump. Brand: Replacement. Fits Years: 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020, 2021, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21. Engine Water Pump -- 15.6L 6-Cylinder Diesel; Variable Speed; Belt... Partsgeek.com | | $269.95 FREE shipping go to store |