---
title: "MMM Mobile Emissions — Clean Truck Check, Ontario, CA"
description: "MMM Mobile Emissions in Ontario, CA is on CARB's Clean Truck Check tester list. Offers mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome…"
url: "https://ctcfinder.com/tester/mmm-mobile-emissions-ontario/"
updated: "2026-11-01"
publisher: "CTC Finder (independent directory, not affiliated with CARB)"
---

# MMM Mobile Emissions

Clean Truck Check tester in Ontario, 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 | 3942 Colorado River Rd, Ontario, CA 91761 |
| County | San Bernardino County |
| Phone | (909) 919-8478 |
| Mobile testing | Yes |
| OBD testing | Yes |
| Smoke opacity (non-OBD) | Yes |
| Motorhomes | Yes |
| Credentialed testers | 1 |
| Last verified | 2026-11-01 |

## Which trucks MMM Mobile Emissions 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 | Yes |
| California-registered motorhome | Same test as above by engine year, once a year | Yes |

## Clean Truck Check testers in San Bernardino County

MMM Mobile Emissions 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 Ontario itself there are 31 listed businesses, 30 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 MMM Mobile Emissions offer mobile Clean Truck Check testing?

Yes. MMM Mobile Emissions 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 MMM Mobile Emissions test a 2012 or older diesel truck?

Yes. MMM Mobile Emissions lists smoke opacity testing, the test CARB requires for diesel trucks of model year 2012 and older (no OBD). See [OBD vs smoke opacity](https://ctcfinder.com/guide/obd-vs-smoke-opacity-test/).

### How much does MMM Mobile Emissions charge for a Clean Truck Check?

MMM Mobile Emissions has not published prices with us; call (909) 919-8478 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 MMM Mobile Emissions a CARB-credentialed tester?

MMM Mobile Emissions 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

- **[Brandon Hitchcock](https://ctcfinder.com/tester/brandon-hitchcock-ontario/)** — Ontario, CA 91761 — (562) 367-9638 — 1 mi. Services: mobile testing, OBD testing, motorhome testing.
- **[California Diesel Complaince](https://ctcfinder.com/tester/california-diesel-complaince-ontario/)** — 1609 S Grove Av #110, Ontario, CA 91761 — (909) 923-8622 — 1 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.
- **[Cctv INC](https://ctcfinder.com/tester/cctv-inc-ontario/)** — 2025 S Milliken Ave, Ontario, CA 91761 — (626) 670-0779 — 1 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.
- **[Eddie Casarez](https://ctcfinder.com/tester/eddie-casarez-ontario/)** — Ontario, CA 91761 — (909) 730-5600 — 1 mi. Services: mobile testing, OBD testing, motorhome testing.
- **[Eric Alfaro](https://ctcfinder.com/tester/eric-alfaro-ontario/)** — Ontario, CA 91761 — (909) 808-1932 — 1 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.
- **[Finish solutions](https://ctcfinder.com/tester/finish-solutions-ontario/)** — 1538 E Cherry Hill St, Ontario, CA 91761 — (909) 816-1592 — 1 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing.