The contact owns a 2023 Toyota Tundra. The contact received notification of NHTSA Campaign Number: 24V381000 (Engine and Engine Cooling); however, the part to do the recall repair was unavailable. The contact stated that the manufacturer had exceeded a reasonable amount of time for the recall repair. The manufacturer was made aware of the failure. The contact stated while driving at an undisclosed speed and depressing the accelerator pedal, the vehicle hesitated before accelerating as intended. The contact stated that the vehicle intermittently hesitated before accelerating as intended while depressing the accelerator pedal. The contact stated that the failure occurred at various speeds. The contact had not taken the vehicle to an independent mechanic or dealer. The vehicle was not diagnosed or repaired. The contact related the failure to NHTSA Campaign Number: 24V381000 (Engine and Engine Cooling). The failure mileage was approximately 50,000. VIN tool confirms parts not available.