^ Mukhang maraming sakit na yung Frontier mo.

- Frontier has no aux fan.
- The fuel filter (primary and secondary) is changed every 20,000kms (OEM or Baldwin would still be the best option).
- Hindi mausok ang Frontier as long as it has been maintained properly; malaking cause niyan ang pag pabaya ng change oil and fuel filters regularly. Possibly also your injection pump may need servicing and calibration given na medyo may edad na yung sasakyan.
- ATF and differential fluid is changed every 40,000kms. you can refer to the owner's manual for the specifications and all the other vehicle service works info/required).
- Have your a/c serviced; it's not the lack of an auxilary fan that is causing the a/c cooling problems. As for cost, depends on what may need replacement.