Apologies for the confusion. The correct answer is actually "the wheel cylinders."
The words "some parts that wore out" can replace the imprecise phrase "some brake things" with domain-specific language.
The sentence mentions that the car needed some brake things replaced. To replace the imprecise phrase "some brake things" with more domain-specific language, we can use the phrase "some parts that wore out". This phrase accurately describes the specific component of the car's brakes that needed replacement.
