---
title: "OG services — Clean Truck Check, Downey, CA | CTC Finder"
description: "OG services in Downey, CA is on CARB's Clean Truck Check tester list. Offers mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing…"
url: "https://ctcfinder.com/tester/og-services-downey/"
updated: "2026-11-01"
publisher: "CTC Finder (independent directory, not affiliated with CARB)"
---

# OG services

Clean Truck Check tester in Downey, CA (Los Angeles 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 | 9127 Brookshire Avenue, Downey, CA 90240 |
| County | Los Angeles County |
| Phone | (323) 369-0501 |
| Mobile testing | Yes |
| OBD testing | Yes |
| Smoke opacity (non-OBD) | Yes |
| Motorhomes | Yes |
| Credentialed testers | 1 |
| Last verified | 2026-11-01 |

## Which trucks OG services 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 Los Angeles County

OG services is one of 516 testing businesses in Los Angeles County on CARB's public tester list. 465 of them offer mobile testing and 190 do smoke opacity tests. In Downey itself there are 9 listed businesses, 7 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 OG services offer mobile Clean Truck Check testing?

Yes. OG services 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 OG services test a 2012 or older diesel truck?

Yes. OG services 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 OG services charge for a Clean Truck Check?

OG services has not published prices with us; call (323) 369-0501 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 OG services a CARB-credentialed tester?

OG services 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

- **[Eagle Smog](https://ctcfinder.com/tester/eagle-smog-downey/)** — 9476 Telegraph Rd, Downey, CA 90240 — (562) 360-0649 — 1 mi. Services: OBD testing, motorhome testing.
- **[Onsite Fleet Mobile Compliance](https://ctcfinder.com/tester/onsite-fleet-mobile-compliance-downey/)** — 9554 Telegraph Rd, Downey, CA 90240 — (562) 261-6867 — 1 mi. Services: mobile testing, OBD testing.
- **[Osvaldo Delmuro](https://ctcfinder.com/tester/osvaldo-delmuro-downey/)** — Downey, CA 90240 — (562) 250-9351 — 1 mi. Services: mobile testing, OBD testing.
- **[Simple Services For You](https://ctcfinder.com/tester/simple-services-for-you-downey/)** — 8050 Florence ave Suite 22, Downey, CA 90240 — (323) 608-3659 — 1 mi. Services: mobile testing, OBD testing.
- **[Downey Smog CORP](https://ctcfinder.com/tester/downey-smog-corp-downey/)** — 10801 Studebaker Rd, Downey, CA 90241 — (562) 863-4085 — 1 mi. Services: OBD testing, motorhome testing.
- **[Itch Vargas](https://ctcfinder.com/tester/itch-vargas-downey/)** — Downey, CA 90241 — (562) 755-4085 — 1 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing.