However, I can tell you that the 2003 Nissan Frontier came with two V6 engine options:
* 3.3L V6: This engine produces 171 horsepower and 198 lb-ft of torque.
* 4.0L V6: This engine produces 245 horsepower and 265 lb-ft of torque.
To know which engine your specific 2003 Nissan Frontier has, you can check the following:
* Vehicle Identification Number (VIN): This is a 17-character code that uniquely identifies your vehicle. You can find this number on your vehicle registration or on a sticker located on the driver's side door jamb. You can then use this number to look up your vehicle's specifications online.
* Engine bay: You can find a sticker or tag on the engine itself that specifies its displacement (e.g., 3.3L or 4.0L).
* Owner's manual: The owner's manual should also provide information about your vehicle's engine.
