Maintaining your 2017 Mazda6 is essential for ensuring optimal performance, and changing the spark plugs is a key part of this process. Spark plugs ignite the air-fuel mixture in your engine's cylinders, and over time, they can wear out, leading to reduced fuel efficiency and engine performance.

Tools and Materials Needed

  • Spark plug socket wrench
  • Socket extension
  • Ratchet
  • Gap gauge
  • New spark plugs (check your Mazda6’s specifications)
  • Torque wrench
  • Anti-seize compound (optional)

Step-by-Step Guide to Changing Spark Plugs

  1. Prepare your vehicle: Ensure the engine is cool to avoid burns. Disconnect the negative battery terminal to prevent electrical shocks.
  2. Locate the spark plugs: On the 2017 Mazda6, the spark plugs are underneath the ignition coils on the engine cover.
  3. Remove ignition coils: Carefully detach the ignition coil connectors and unbolt the coils to access the spark plugs.
  4. Remove old spark plugs: Use the spark plug socket wrench with an extension to carefully unscrew and remove each spark plug.
  5. Check and gap new spark plugs: Verify the gap with a gap gauge and adjust if necessary to match Mazda’s specifications.
  6. Install new spark plugs: Thread the new plugs by hand to avoid cross-threading, then tighten them with a torque wrench to the recommended torque setting.
  7. Reinstall ignition coils: Bolt the ignition coils back into place and reconnect the wiring.
  8. Reconnect the battery: Reattach the negative terminal and start the engine to ensure smooth operation.

Regularly replacing spark plugs can enhance your Mazda6’s fuel efficiency, reduce emissions, and improve acceleration. Follow this guide every 30,000 to 60,000 miles, or consult your owner’s manual for specific intervals.