| Business | Phone |
| Auto Masters 2030 Harbor Blvd, Costa Mesa 92627 | (949) 631-4343 |
| Zee's Smog Test Only Station 1661 Superior Ave, Costa Mesa 92627 | (949) 650-2332 |
| Harbor Smog Test Only Center 2030 Harbor Blvd, Costa Mesa 92627 | (949) 554-0808 |
| South Coast Auto Center 2030 Harbor Blvd, Costa Mesa 92627 | (949) 645-1230 |