2022 Kenworth T680

Category, Trucks. Mileage history, 551,360 miles points to a highway duty cycle with the usual long-interval wear items coming due, cooling system hoses and clamps, charge-air plumbing, wheel seals, driveline U-joints, and suspension bushings. Service records and recent oil sample history matter at this point more than cosmetics, especially for confirming consistent PM intervals and catching coolant or fuel dilution trends. Powertrain details, engine, transmission, and axle ratio are not provided, so application fit cannot be pinned down beyond general sleeper tractor use. Verification items, ECM hours, idle percentage, active and inactive fault history, aftertreatment service events, and any derate history, help separate normal high-mileage operation from chronic emissions or sensor issues. Frame rails and undercarriage, look for rail corrosion at crossmember joints, evidence of prior repairs near the fifth wheel and suspension hangers, and elongation at mounting holes. Fifth wheel condition, check jaw wear, top plate cracking, and slider rail lubrication if equipped. Cab and sleeper interior, inspect seat base play, pedal wear, HVAC performance, and water intrusion at sleeper seams, then confirm all dash functions and multiplex switches operate cleanly. Identification, serial number 1XKYD49X0NJ485552 and stock 0633518 should be matched to the door tag and ECM VIN to rule out module swaps.