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The 2005 Nissan Frontier is equipped with 2 catalytic converters, but there are various issues that may arise with the engine. These include potential problems like excessive oil consumption, leading to the need for more frequent oil changes. Particularly concerning is the risk of engine overheating, which could result in fires or even an explosion. It's important to promptly address any loose gaskets or spark plug issues that may occur. Additionally, it's recommended to address oil leaks promptly and change the coolant every 60,000 miles. Spark plugs should typically be replaced every 100,000 miles, except for copper ones which should be replaced every 30,000 miles. Routine maintenance like changing the air filter every 15,000 to 30,000 miles is also essential.
In 2005, the Nissan Frontier offers a 2.5-liter inline-4 engine with one catalytic converter or a 4.0-liter V6 engine with two catalytic converters.