---
title: "Smog Experts Test Only — Clean Truck Check, Hesperia, CA"
description: "Smog Experts Test Only in Hesperia, CA is on CARB's Clean Truck Check tester list. Offers OBD testing, motorhome testing. Phone, address and nearby testers."
url: "https://ctcfinder.com/tester/smog-experts-test-only-hesperia/"
updated: "2026-11-01"
publisher: "CTC Finder (independent directory, not affiliated with CARB)"
---

# Smog Experts Test Only

Clean Truck Check tester in Hesperia, CA (San Bernardino 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 | 9472 C Ave, Hesperia, CA 92345 |
| County | San Bernardino County |
| Phone | (760) 221-1346 |
| Mobile testing | No |
| OBD testing | Yes |
| Smoke opacity (non-OBD) | No |
| Motorhomes | Yes |
| Credentialed testers | 1 |
| Last verified | 2026-11-01 |

## Which trucks Smog Experts Test Only 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 Clear Pass in Hesperia, about 1 mile away. [See listing](https://ctcfinder.com/tester/clear-pass-hesperia/).

If you need a tester at your yard, the nearest listed tester that offers mobile testing is Centurion Transport in Hesperia, about 1 mile away. [See listing](https://ctcfinder.com/tester/centurion-transport-hesperia/).

## Clean Truck Check testers in San Bernardino County

Smog Experts Test Only is one of 277 testing businesses in San Bernardino County on CARB's public tester list. 243 of them offer mobile testing and 98 do smoke opacity tests. In Hesperia itself there are 20 listed businesses, 18 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 Experts Test Only offer mobile Clean Truck Check testing?

Not according to CARB's tester list; plan to bring the truck to the tester. The nearest listed mobile tester is [Centurion Transport](https://ctcfinder.com/tester/centurion-transport-hesperia/) (about 1 mile).

### Can Smog Experts Test Only test a 2012 or older diesel truck?

Smog Experts Test Only does not list smoke opacity testing, which older non-OBD diesel trucks need. The nearest listed tester that does is [Clear Pass](https://ctcfinder.com/tester/clear-pass-hesperia/) (about 1 mile). Trucks from 2013 on get an OBD scan instead.

### How much does Smog Experts Test Only charge for a Clean Truck Check?

Smog Experts Test Only has not published prices with us; call (760) 221-1346 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 Experts Test Only a CARB-credentialed tester?

Smog Experts Test Only 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

- **[Centurion Transport](https://ctcfinder.com/tester/centurion-transport-hesperia/)** — 9724 E Ave, Hesperia, CA 92345 — (760) 662-9513 — 1 mi. Services: mobile testing, OBD testing, motorhome testing.
- **[Clear Pass](https://ctcfinder.com/tester/clear-pass-hesperia/)** — Hesperia, CA 92345 — (951) 519-0004 — 1 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.
- **[Gilberto Martinez](https://ctcfinder.com/tester/gilberto-martinez-hesperia/)** — Hesperia, CA 92345 — (442) 319-9430 — 1 mi. Services: mobile testing, OBD testing, motorhome testing.
- **[Hector Reyes](https://ctcfinder.com/tester/hector-reyes-hesperia/)** — Hesperia, CA 92345 — (951) 399-9782 — 1 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.
- **[JBJ Mobile Diesel Smog](https://ctcfinder.com/tester/jbj-mobile-diesel-smog-hesperia/)** — 11370 Shahaptian Ave, Hesperia, CA 92345 — (909) 254-3272 — 1 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.
- **[Kevin Tafoya](https://ctcfinder.com/tester/kevin-tafoya-hesperia/)** — Hesperia, CA 92345 — (323) 617-1260 — 1 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing.