| Business | Phone |
| Circle City Test Only 110 Washburn Cir # B, Corona 92882 | (951) 371-6612 |
| Corona Test Only 2189 Sampson Ave # 110, Corona 92879 | (951) 284-1700 |
| El Cerrito Test Only 19630 Temescal Canyon Rd, Corona 92881 | (951) 371-6238 |
| Ramos Auto Svc 13558 Magnolia Ave, Corona 92879 | (951) 737-9960 |
| Smog Stop 1210 E 6th St # A, Corona 92879 | (951) 736-6642 |
| Smog Test Only Station 1453 W 6th St # 101, Corona 92882 | (951) 738-0123 |