McNeilus Truck & Manufacturing (McNeilus) is recalling certain 2013-2018 Bridgemaster Mixer, Standard Mixer, Model 49 Autoreach Side Loader, Model 48 Zero Radius Side Loader, Model 78 Meridian Front Loader, Model 29 Atlantic Front Loader, Model 87 Contender Front Loader, Model 42 Manual Automated Side Loader, Model 16 3.5 yard TG Rear Loader, Model 11 Heavy Duty Rear Loader, Model 66 40.60 Split Body Rear Loader, Model 10 Standard Rear Loader, Model 12 Tailgate Tag Axle Rear Loader, and Model 13 High Compaction Rear Loader vehicles. The vehicles are powered with compressed natural gas (CNG) and are equipped with pressure relief devices (PRD) that may not function as designed, failing to vent a buildup of pressure, such as could occur if the CNG tank was exposed to fire.