Nissan Pathfinder persistent engine noise issue unresolved after multiple service visits on Nissan Pathfinder

Some Nissan Pathfinder owners report experiencing persistent engine noise issues that remain unresolved after multiple service visits. These noises may be attributed to low oil levels or pressure, problems with the ignition system, or exhaust leaks. Additionally, timing chain problems, such as stretching from wear and tear or inadequate maintenance, can result in loud rattling sounds. Some owners also report knocking noises linked to a deteriorated timing belt due to sludge buildup from poor maintenance. This noise often occurs under load, particularly at around 2000-3000 rpm in higher gears on the highway. Given the complexity of diagnosing these engine noises, it is crucial for owners to collaborate with knowledgeable technicians for thorough inspections. If the issue persists, seeking a second opinion from a different mechanic or dealership may be advisable to ensure all potential causes are explored and addressed.