KIA Niro: Checking Refrigerant Specifications

  1. Check refrigerant specifications label inside engine room.


R-134a R-1234yf


  1. If refrigerant specifications label is not visible, check the refrigerant service port diameter.

High pressure side

R-134a R-1234yf

R-1234yf Low pressure side

Low pressure side

R-134a R-1234yf

R-1234yf Service port diameter for high/low pressure side varies based on refrigerant

Service port diameter for high/low pressure side varies based on refrigerant specification.


     Refrigerant System Service Basics (R- 134a)

    For the electric compressor using high-voltage, use POE oil with high insulation property. Use a separate equipment (refrigerant recovery / charger) exclusive for hybrid vehicle maintenance to prevent infusion of PAG oil of non-hybrid v

     Refrigerant System Service Basics (R- 1234yf)

    Refrigerant Identification Do not mix HFO-1234yf (R-1234yf) in the vehicle with other refrigerant, such as R-12, R-134a and etc. Use only the UL-listed service equipment certified to meet the requirements of SAE standards to recover and r

     Filter  inspection

    The climate control air filter should be replaced according to the maintenance schedule. If the vehicle is operated in severely air-polluted cities or on dusty rough roads for a long period, it should be inspected more frequently and replaced


     Main/ Sub High Voltage Battery

    Main High Voltage Battery Power Relay Assembly (PRA) Cell Monitoring Unit (CMU) Battery Temperature Sensor Runaway Arresting Device (RAD) Warning Main Relays (Positive, Negative), Pre-Charge Relay, Pre-Charge Resistor, and Battery

     Speaker Repair procedures

    Troubleshooting of the speakers Warning When handling the speakers : Do not cause shock to the speakers by dropping or throwing them. Be careful not to drop water and oil on the speakers. Use caution to handle the speaker because diaphra