I have a 2004 lexus gs 430. I need to charge up my AC unit. Do you know what type of refrigerant I need?

 

R134A- There is a sticker located engine compartment which specifies the type of refrigerant and as important the proper quantity. Please be aware that more is not better when charging refrigerant. Check around the low pressure service valve for residual oil. Its a weak point in the system for leaks. The weld joint can crack if someone gets carryed away connecting/disconnecting the gauge set.