A: To replace spark plugs, you'll need appropriate tools like a plug wrench or spark plug socket, a feeler gauge to check and adjust gaps, a spark plug wire removal tool, and a rubber hose to ease installation. Purchase new spark plugs based on your engine's specifications from the Emissions Control Information label or owner's manual, and adjust their gaps as needed. Allow the engine to cool completely before replacing the plugs, inspect each new plug for defects, and check the gaps. Cover the vehicle's fenders to protect the paint. With a cool engine, remove one spark plug wire by gently pulling on the boot using a twisting motion or a removal tool. Use compressed air or a bicycle pump to clear debris around the plug area to prevent foreign material from falling into the cylinder. Then, use a spark plug wrench or socket to remove the plug counterclockwise. Compare the old spark plug's condition to the reference images. For installation, insert the new plug into a rubber hose, ensuring flexibility for proper angle alignment and protection against damaged threads. Tighten it with a torque wrench for secure seating, reattach the plug wire, and follow this procedure for the remaining plugs, replacing them one by one to avoid wire mix-ups.