---
title: "Transit Systems Unlimited — Clean Truck Check, Sun Valley, CA"
description: "Transit Systems Unlimited in Sun Valley, CA is on CARB's Clean Truck Check tester list. Offers mobile testing, OBD testing, smoke opacity (non-OBD) testing…"
url: "https://ctcfinder.com/tester/transit-systems-unlimited-sun-valley/"
updated: "2026-11-01"
publisher: "CTC Finder (independent directory, not affiliated with CARB)"
---

# Transit Systems Unlimited

Clean Truck Check tester in Sun Valley, 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 | 8976 Laurel Canyon Blvd, Sun Valley, CA 91352 |
| County | Los Angeles County |
| Phone | (818) 744-5429 |
| Mobile testing | Yes |
| OBD testing | Yes |
| Smoke opacity (non-OBD) | Yes |
| Motorhomes | Yes |
| Credentialed testers | 1 |
| Last verified | 2026-11-01 |

## Which trucks Transit Systems Unlimited 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

Transit Systems Unlimited 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 Sun Valley itself there are 10 listed businesses, 10 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 Transit Systems Unlimited offer mobile Clean Truck Check testing?

Yes. Transit Systems Unlimited 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 Transit Systems Unlimited test a 2012 or older diesel truck?

Yes. Transit Systems Unlimited 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 Transit Systems Unlimited charge for a Clean Truck Check?

Transit Systems Unlimited has not published prices with us; call (818) 744-5429 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 Transit Systems Unlimited a CARB-credentialed tester?

Transit Systems Unlimited 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

- **[Aldana's Smog Check](https://ctcfinder.com/tester/aldanas-smog-check-sun-valley/)** — 8618 Lankershim Blvd, Sun Valley, CA 91352 — (818) 851-2999 — 1 mi. Services: mobile testing, OBD testing.
- **[EA Fleet Service INC](https://ctcfinder.com/tester/ea-fleet-service-inc-sun-valley/)** — Sun Valley, CA 91352 — (818) 748-5311 — 1 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.
- **[L.A. Fleet Care](https://ctcfinder.com/tester/l-a-fleet-care-sun-valley/)** — 11277 Dora St, Sun Valley, CA 91352 — (818) 433-5299 — 1 mi. Services: mobile testing, OBD testing, motorhome testing.
- **[LA Fleet Care](https://ctcfinder.com/tester/la-fleet-care-sun-valley/)** — 11277 Dora St, Sun Valley, CA 91352 — (818) 582-4582 — 1 mi. Services: mobile testing, OBD testing, motorhome testing.
- **[Manuk Manukyan](https://ctcfinder.com/tester/manuk-manukyan-sun-valley/)** — Sun Valley, CA 91352 — (949) 272-6034 — 1 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.
- **[Miguels CTC](https://ctcfinder.com/tester/miguels-ctc-sun-valley/)** — 12242 Branford St, Sun Valley, CA 91352 — (805) 638-3911 — 1 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.