How often should the Murano's spark plugs be replaced?
4 Answers
The Murano's spark plugs should be replaced every 50,000 kilometers. Methods to determine if spark plugs are damaged: Remove the spark plugs and observe their appearance to assess their condition. Normal spark plugs have an insulator skirt and electrodes that appear gray-white, gray-yellow, or light brown. A properly functioning spark plug will have a reddish-brown insulator skirt, with an electrode gap between 0.8-0.9mm and no signs of electrode burn. If the spark plugs are covered in oil or deposits but are not damaged, they can continue to be used after cleaning off the oil and deposits. If the spark plugs are severely damaged, showing signs like blistering, black streaks, cracks, or melted electrodes, the cause of the damage should be identified. After troubleshooting, replace the spark plugs with new ones. Additionally, if the spark plugs appear black as if smoked, it indicates the wrong heat range was selected, the air-fuel mixture is too rich, or engine oil is leaking into the combustion chamber.
I just bought a Murano, and the spark plug replacement interval should be checked in the owner's manual. Nissan generally recommends replacing them every 60,000 kilometers or 5 years, but it depends on driving conditions; I drive mostly in the city, where frequent starts and stops can wear out spark plugs faster, so I have them checked every 40,000 kilometers. Worn spark plugs can cause engine shaking, increased fuel consumption, and even affect acceleration; if maintenance is delayed, you might end up repairing the ignition coils, which costs more. I suggest having the mechanic test the resistance during regular maintenance—replacing them early can save hassle. Opting for OEM iridium spark plugs ensures longer lifespan, easily lasting up to 80,000 kilometers. This way, the car runs smoother, and safety comes first.
I'm a long-haul truck driver and change the Murano's spark plugs more frequently. High-speed driving accelerates wear—I cover over a thousand kilometers weekly on highways, so I inspect spark plugs every 30,000 km. The manual suggests 50,000–60,000 km, but driving habits make a big difference. If there's idle vibration or jerky acceleration, it’s a sign to replace them. I use copper spark plugs for lower cost but replace them often, while iridium ones last longer. Maintaining the ignition system prevents fuel consumption spikes. Last time I delayed replacement, it caused engine issues and higher repair costs. Regularly checking carbon buildup is a good habit.
From an enthusiast's perspective, Murano spark plug replacement depends on type. OEM iridium or platinum plugs typically last over 70,000 km; aftermarket copper ones require changing every 40,000 km. Asking about the model during maintenance is crucial to avoid shortening lifespan. Worn spark plugs reduce ignition efficiency, causing rough idling and increased emissions. Choosing quality spark plug materials enhances performance and fuel efficiency - professional inspection every 50,000 km is recommended.
