Does a 2006 Hyundai Sonata use r-134?

Yes, the 2006 Hyundai Sonata uses R-134a refrigerant for its air conditioning system. This refrigerant is commonly used in vehicles manufactured before the transition to R-1234yf, which began in the early 2010s. If you're servicing the A/C system, ensure that you use the correct type of refrigerant to maintain optimal performance.