Here are 2025's most popular questions and answers from The Journal's Car Doctor column, from rotating tires to oil changes.

So your car’s transmission is acting up or throwing a heart-stopping fault code and you want to find out if the speed sensors are causing it? Fabulous. Your car’s transmission speed sensors are vital ...

Wheel bearings are a set of rigid steel ball bearings that form an essential part of a vehicle's steering, suspension, and braking systems. They are located inside a sealed metal casing in the vehicle ...

Modern cars rely on a dense web of sensors to manage everything from fuel delivery to collision avoidance, and when one fails ...