Regular maintenance is key to keeping your 2016 Acura RLX running smoothly. One essential task is changing the spark plugs, which helps improve engine performance and fuel efficiency. Worn spark plugs can cause misfires, rough idling, and reduced power.

Tools and Materials Needed

  • Spark plug socket and ratchet
  • Torque wrench
  • Extension bar
  • New spark plugs (check your owner's manual for specifications)
  • Dielectric grease
  • Compressed air or a clean brush

Step-by-Step Spark Plug Replacement

  1. Allow the engine to cool completely to avoid burns.
  2. Locate the spark plugs by removing the engine cover if necessary.
  3. Use compressed air to clean around the spark plug area to prevent debris from entering the cylinder.
  4. Disconnect the ignition coil connectors and remove the coils carefully.
  5. Use the spark plug socket and ratchet with an extension to loosen and remove the old spark plugs.
  6. Check the gap on the new spark plugs and adjust if needed according to the manufacturer’s recommendations.
  7. Apply a small amount of dielectric grease to the inside of the ignition coil boots.
  8. Install the new spark plugs by hand to avoid cross-threading, then tighten them with a torque wrench to the specified torque.
  9. Reinstall the ignition coils and reconnect the connectors.
  10. Replace the engine cover if removed, and start the engine to ensure smooth operation.

Changing spark plugs on your Acura RLX can restore lost power, improve fuel economy, and extend the life of your engine. If you're unsure or uncomfortable with the process, consult a professional mechanic to ensure the job is done correctly.