NHTSA complaint #11673345

Owner complaint summary

Tires keep losing balance. From my initial test drive of this new 2024 Lincoln Navigator L, I have noticed a rough ride and vibrations, especially at highway speeds. Initially, 1 tire was identified as not being able to be road force balanced within spec as the cause of the vibration and that tire was replaced. Within a short period of time, the rough ride and vibration issues reoccurred, and the dealership stated that two additional tires were determined as no longer being able to be road force balanced within spec and needed to be replaced. It was then suggested that all 4 OEM Pirelli tires be replaced with a full new set of Michelin tires. Shortly thereafter, the rough ride and vibration issues cropped again and it was determined that all four Michelin tires would no longer road force balance within spec and they were replaced with an all new set of four Michelin tires. Those tires have now been road forced balanced twice more, with tires needing to be rebalanced. Even though the dealership service departments have tried, no underlying suspension issues have been identified as causing all these tires to need rebalancing. I have even taken my vehicle to an independent tire shop to assess if tires are out of balance, and they verified that they were and performed a road force balance on them, however within a matter of weeks the tires needed to be rebalanced again. In total, in the 4 months that I have had this vehicle, it has been at the dealership service department for more than 25% of the time with no determination as to what the underlying cause of why tires need to be rebalanced so frequently, or fail to the point that they no long rebalance and need to be replaced.