What effect does a worn wheel bearing have on a vehicle?

A worn wheel bearing can lead to excessive friction and heat, which can significantly impact the performance and safety of a vehicle. As the bearing wears down, it may not rotate as efficiently, causing additional friction in the wheel assembly. This increase in friction generates heat, which can lead to further deterioration of the bearing and surrounding components. Over time, if left unaddressed, this can result in complete bearing failure, which poses serious risks, including loss of wheel control and potential accidents.

The other options do not accurately reflect the impact of a worn wheel bearing. Increased weight on the tires is unlikely to be a consequence directly caused by a worn bearing. A smoother and quieter drive is typically associated with well-functioning, properly lubricated bearings; worn bearings would produce noise and instability. Improved handling and steering response are linked to properly functioning suspension and wheel components, not to deteriorating wheel bearings. Thus, the correct understanding of the severity of a worn wheel bearing's impact is critical for maintaining vehicle safety and performance.