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The INFINITIQ50 faces acceleration challenges due to faulty fuel injectors and spark plugs. Engine complications may arise, such as spark plug detachment causing issues, loose gaskets needing tightening, and oil leaks requiring prompt repair. A critical issue is engine overheating, potentially leading to fires and explosions. Excessive oil consumption may necessitate more frequent oil changes. Coolant should be replaced every 60,000 miles, while air filters should be replaced every 15,000 to 30,000 miles. Spark plugs typically need changing every 100,000 miles unless they are copper, in which case replacement is required every 30,000 miles.
Certain issues with the acceleration of the INFINITI Q50 include slow response and intermittent halting.