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The 2015 Mazda CX5 is equipped with a timing chain rather than a timing belt, a feature that has been present since the model's inception in 2013. The decision to use a chain over a belt is primarily due to the chain requiring less frequent maintenance. Unlike a timing belt, which needs to be replaced periodically, a timing chain can last for the duration of the vehicle's lifespan unless there is a significant issue. If the car were to utilize a timing belt, it would typically need to be replaced every 60,000 to 100,000 miles, whereas the chain only needs to be inspected around every 150,000 miles. Checking the timing chain simply involves examining the tension and ensuring everything is functioning correctly.
The engine block of the 2015 Mazda CX 5 features a timing chain.