KY Smog & Test Only (加恩汽車排煙檢測中心) is a STAR Certified Smog Inspection Station that serves the cities of Monterey Park and its neighboring cities Alhambra, East Los Angeles, Montebello, Rosemead, South Pasadena and the greater Los Angeles area.

Dennis "Kai Yee" Hui, a long-time Monterey Park resident started KY Smog & Test Only in May 2010 after diligently working for other automotive employers for 23 years. In 2017, his son Matthew assumed the responsibilities of manager and technician of KY Smog & Test Only continuing the legacy that his father Dennis left behind in serving the community with prompt and courteous service.  

Why do our customers from Monterey Park, Alhambra, Montebello, South Pasadena, East Los Angeles, Rosemead, and all over the surrounding San Gabriel Valley choose us for their smog check needs? With over 25 years of experience, we have seen cars from all makes and models and are more than happy to help you navigate through the muddy (and sometimes complex) process smog checks when it comes to vehicle registration and change of ownership requirements. 

Our business is dedicated to making the process of getting your car smog certified for auto registration renewal and change of ownership transfers straightforward and seamless. We also provide smog check and smog certifications for out of state vehicles looking to register in California, Diesel, and hybrid vehicles. 


If you want to go fast, go alone. If you want to go far, go together.
— African Proverb