Last week a young enthusiast and his mom came to my shop. In hand was a fairly new Lionel Lionchief / bluetooth ES44 diesel engine. Only ran a few times since new. Popped the shell and I got a surprise! The 2 motors are like the light duty handcar motor. My first thought was the circuit board. Put some leads from muli-tester. Nope, getting voltage from the socket for the motors. Wiring looked good, so checked the motors with a ohm reading. Both of them with open circuit. No good. Checked Lionel's website. Motors are not available.
The young lad and mom were waiting and broke the news. Both motors burn't out, and no replacements available. needless to say both were extremely disappointed. The set was gifted to him. Now I told them, it may be only be temporary out of stock, or the motors may never be available again.