Something Navys Arielle Charnas Tests Positive For Coronavirus Says Body Aches Are Debilitating - Dirshu Media
The construction was to help to do, but to help is used so often with an infinitive that speakers began to consider it something like a modal verb such as can, may etc and began dropping to. But parts of a car can also be understood as: The engine, the hood, the roof, the chassis, and not something replaceable as in something you can buy at an auto parts' store.
Another possibility is that the writer uses separate words to emphasize the thing part (in contrast to some one). To quote jim carrey quoting shatner.
