There are four spark plugs in the 2014 Mazda6, one for each cylinder of its 2.5-liter inline-four SKYACTIV-G engine. This coil-on-plug setup ensures each cylinder is ignited independently. The following explains the engine layout and what to know about maintenance for this model year.
Engine configuration and spark plug count
The 2014 Mazda6 for most markets is equipped with a 2.5-liter SKYACTIV-G four-cylinder engine. Each of the engine’s four cylinders contains a single spark plug, and each plug is fired by its own ignition coil (coil-on-plug). In total, the car uses four spark plugs.
Key facts to know about this arrangement include:
- Total spark plugs: 4
- One spark plug per cylinder (4 cylinders)
- Ignition system: coil-on-plug for each cylinder
- Typical replacement interval: around 100,000 miles (160,000 km) under normal driving, though check the owner's manual and service schedule for your specific vehicle
Conclusion: The Mazda6’s four-cylinder configuration dictates four spark plugs, with maintenance aligned to standard four-cylinder spark plug service practices.
Maintenance considerations
Replacement interval and signs of wear
Most 2.5-liter SKYACTIV-G engines suggest spark plug replacement around 100,000 miles (160,000 km) under normal driving conditions. Severe or aggressive driving, short trips, or towing can shorten this interval. Always consult the owner's manual and use OEM-recommended plugs or equivalents when replacing.
Symptoms of worn or failing plugs
Common indicators include rough idle, engine misfires, reduced acceleration, decreased fuel efficiency, or difficulty starting. If you notice these symptoms, have the spark plugs and ignition system inspected and replaced as needed to protect the catalytic converter and maintain performance.
Summary
The 2014 Mazda6 uses four spark plugs, corresponding to its four-cylinder engine. A coil-on-plug ignition system ensures each cylinder has its own spark, and typical maintenance calls for replacement around 100,000 miles, depending on driving conditions and warranty coverage. Always refer to the owner's manual for the exact interval and recommended plug type.