4Less Smog Check is a STAR Certified Test Only station in San Mateo, CA offering extremely efficient vehicle smog inspections. Most vehicles can be tested in only 15 minutes. Our ASE certified technicians strive to maintain exceptional customer service standards. Certificates are sent electronically to the DMV for FREE! We even offer one free retest if your vehicle fails inspection! Stop by for a walk-in or call 650-762-8434 to schedule a convenient appointment.