2021 Freightliner CA-126

Category, Truck. Mileage history points to a highway duty cycle, with the kind of accumulated wear you see on driveline joints, fifth wheel contact surfaces, and cab touch points. Serial 3AKNHHDR6MSMJ7730 and stock B3462P are the identifiers to match against service records, warranty history, and any prior component swaps. Powertrain details are not provided, so the practical next step is verifying engine family, transmission model, and rear ratio from the door tag, build sheet, or ECM pull. ECM data is listed blank, so plan on a scan for active and inactive fault codes, aftertreatment status, regen history, and engine hours to confirm idle percentage versus road time. Frame rails and crossmembers should be checked for corrosion scale, drilled holes from prior mounts, and any signs of heat or impact, especially around suspension hangers and the fifth wheel plate. Fifth wheel condition comes down to jaw wear, top plate grooving, and slider rail movement if equipped. Cab upholstery, sleeper trim, and pedal wear usually tell the truth about driver turnover and maintenance habits, with windshield, hood hinges, and door seals worth a close look for vibration and wind noise clues. Tires and brakes need a measured inspection, tread depth by position, rotor or drum condition, and any uneven wear that points to alignment, kingpin, or suspension bushing issues. Air system checks should include compressor build time, air dryer cycle, and leak-down rate, with a cold start observation for blow-by, coolant pressure behavior, and any oil residue around charge-air plumbing and turbo connections.