---
title: "Smog Express LLC — Clean Truck Check, Buena Park, CA"
description: "Smog Express LLC in Buena Park, CA is on CARB's Clean Truck Check tester list. Offers mobile testing, OBD testing, motorhome testing. Phone, address and nearby…"
url: "https://ctcfinder.com/tester/smog-express-llc-buena-park/"
updated: "2026-11-01"
publisher: "CTC Finder (independent directory, not affiliated with CARB)"
---

# Smog Express LLC

Clean Truck Check tester in Buena Park, CA (Orange County).

> CTC Finder is an independent directory, not affiliated with CARB. Tester data: CARB Clean Truck Check public tester list, last checked November 1, 2026. Confirm services, hours and prices with the tester.

| Field | Value |
|---|---|
| Location | 6881 Stanton Ave Ste J, Buena Park, CA 90621 |
| County | Orange County |
| Phone | (949) 235-2509 |
| Mobile testing | Yes |
| OBD testing | Yes |
| Smoke opacity (non-OBD) | No |
| Motorhomes | Yes |
| Credentialed testers | 1 |
| Last verified | 2026-11-01 |

## Which trucks Smog Express LLC can test

| Your vehicle | Test required | This tester |
|---|---|---|
| Diesel, model year 2013 or newer | OBD scan | Yes |
| Alternative fuel (natural gas, propane), 2018 or newer | OBD scan | Yes |
| Diesel, model year 2012 or older (no OBD) | Smoke opacity test (SAE J1667) plus visual inspection | Not listed |
| California-registered motorhome | Same test as above by engine year, once a year | Yes |

For a 2012 or older diesel, the nearest listed tester with smoke opacity testing is First Class Smog in Buena Park, about 1 mile away. [See listing](https://ctcfinder.com/tester/first-class-smog-buena-park/).

## Clean Truck Check testers in Orange County

Smog Express LLC is one of 159 testing businesses in Orange County on CARB's public tester list. 146 of them offer mobile testing and 84 do smoke opacity tests. In Buena Park itself there are 9 listed businesses, 9 of them mobile.

## When your truck is due

Most trucks test twice a year, on a schedule tied to the DMV registration expiration date. CARB says OBD trucks move to four tests a year beginning October 2027. California-registered (non-commercial) motorhomes and agricultural vehicles test once a year. See the [deadline guide](https://ctcfinder.com/guide/deadlines-2026-2027/). You can test up to 90 days before a deadline. Free email reminders: https://ctcfinder.com/reminders/

## Frequently asked questions

### Does Smog Express LLC offer mobile Clean Truck Check testing?

Yes. Smog Express LLC says on CARB's tester list that it offers mobile testing, so it can come to your yard or job site. Ask about a trip fee when you call.

### Can Smog Express LLC test a 2012 or older diesel truck?

Smog Express LLC does not list smoke opacity testing, which older non-OBD diesel trucks need. The nearest listed tester that does is [First Class Smog](https://ctcfinder.com/tester/first-class-smog-buena-park/) (about 1 mile). Trucks from 2013 on get an OBD scan instead.

### How much does Smog Express LLC charge for a Clean Truck Check?

Smog Express LLC has not published prices with us; call (949) 235-2509 for a quote. Published California prices are usually $50–$135 per vehicle for an OBD test and $190–$200 for a smoke opacity test, plus CARB's annual fee ($32.13 in 2026). See the [cost guide](https://ctcfinder.com/guide/cost/).

### Is Smog Express LLC a CARB-credentialed tester?

Smog Express LLC appears on CARB's public Clean Truck Check tester list, last checked November 1, 2026. Only credentialed testers can submit results to CARB; after the test, confirm the passing result shows for your vehicle in CTC-VIS.

## Other testers nearby

- **[CS Transportation Insurance Agency](https://ctcfinder.com/tester/cs-transportation-insurance-agency-buena-park/)** — 7033 Orangethorpe Ave Suite B, Buena Park, CA 90621 — (213) 718-4468 — 1 mi. Services: mobile testing, OBD testing.
- **[First Class Smog](https://ctcfinder.com/tester/first-class-smog-buena-park/)** — 7870 Commonwealth Ave Suite B, Buena Park, CA 90621 — (714) 822-9928 — 1 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.
- **[shawn Truong](https://ctcfinder.com/tester/shawn-truong-buena-park/)** — Buena Park, CA 90621 — (714) 397-8025 — 1 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.
- **[Auto logic](https://ctcfinder.com/tester/auto-logic-fullerton/)** — 4344 Artesia Ave, Fullerton, CA 92833 — (714) 403-5422 — 2 mi. Services: mobile testing, OBD testing, motorhome testing.
- **[Hoang Truong](https://ctcfinder.com/tester/hoang-truong-fullerton/)** — Fullerton, CA 92833 — (714) 397-8025 — 2 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.
- **[Burke Banner](https://ctcfinder.com/tester/burke-banner-la-mirada/)** — La Mirada, CA 90638 — (562) 810-1446 — 2 mi. Services: mobile testing, OBD testing.