Dealership Responsible: Ted Britt Ford of Chantilly Dealership Address: 4175 Auto Park Cir, Chantilly, VA 20151 Complaint Details: I purchased a 2018 Lincoln Navigator L Black Label, and since then, I have experienced multiple serious mechanical failures due to an improperly performed cam phaser repair by Ted Britt Ford of Chantilly in 2020. The dealerships service department performed a faulty installation, which resulted in: ¢Missing and broken screws in the cam phaser system ¢Jerking, rattling, and acceleration issues ¢Significant engine damage requiring a complete short block replacement As a result of this in negligent repair, In 2024 I had to replace the cam phaser again, along with replacing the short block of the engine due to the extensive damage caused by the dealerships poor workmanship. In addition to this issue, I have faced multiple other failures, including: ¢Valve body replacement ¢Wastegate failure ¢Rear heat stopped working ¢Steering column failure These problems have caused frequent breakdowns and safety concerns, making the vehicle unreliable. The constant need for repairs raises serious questions about the quality of Lincolns engineering and service network. This issue is not an isolated incident, and I strongly urge NHTSA to investigate potential defects in the 2018 Lincoln Navigator and to hold dealerships accountable for performing unsafe and defective repairs. Requested Action: I request an investigation into the faulty cam phaser repair process and whether similar issues are being reported by other 2018 Lincoln Navigator owners. This could indicate a larger systemic defect or a trend of poor-quality repairs in Ford/Lincoln service centers