---
title: "Mosher Equipment Services LLC — Clean Truck Check, Gilroy, CA"
description: "Mosher Equipment Services LLC in Gilroy, 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/mosher-equipment-services-llc-gilroy/"
updated: "2026-11-01"
publisher: "CTC Finder (independent directory, not affiliated with CARB)"
---

# Mosher Equipment Services LLC

Clean Truck Check tester in Gilroy, CA (Santa Clara 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 | 1290 Masten Ave, Gilroy, CA 95020 |
| County | Santa Clara County |
| Phone | (408) 660-5693 |
| Mobile testing | Yes |
| OBD testing | Yes |
| Smoke opacity (non-OBD) | Yes |
| Motorhomes | Yes |
| Credentialed testers | 1 |
| Last verified | 2026-11-01 |

## Which trucks Mosher Equipment Services 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 | Yes |
| California-registered motorhome | Same test as above by engine year, once a year | Yes |

## Clean Truck Check testers in Santa Clara County

Mosher Equipment Services LLC is one of 79 testing businesses in Santa Clara County on CARB's public tester list. 67 of them offer mobile testing and 27 do smoke opacity tests. In Gilroy itself there are 13 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 Mosher Equipment Services LLC offer mobile Clean Truck Check testing?

Yes. Mosher Equipment Services 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 Mosher Equipment Services LLC test a 2012 or older diesel truck?

Yes. Mosher Equipment Services LLC 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 Mosher Equipment Services LLC charge for a Clean Truck Check?

Mosher Equipment Services LLC has not published prices with us; call (408) 660-5693 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 Mosher Equipment Services LLC a CARB-credentialed tester?

Mosher Equipment Services 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

- **[B&L Truck and Tractor Repair](https://ctcfinder.com/tester/b-and-l-truck-and-tractor-repair-gilroy/)** — 8594 Forest St, Gilroy, CA 95020 — (831) 889-8611 — 1 mi. Services: mobile testing, OBD testing, motorhome testing.
- **[Cruz Tire & Truck Repair](https://ctcfinder.com/tester/cruz-tire-and-truck-repair-gilroy/)** — 5870 Monterey Rd A, Gilroy, CA 95020 — (909) 533-0433 — 1 mi. Services: mobile testing, OBD testing.
- **[Dhillon CARB Testing](https://ctcfinder.com/tester/dhillon-carb-testing-gilroy/)** — 1125 Violet Way, Gilroy, CA 95020 — (408) 775-9600 — 1 mi. Services: mobile testing, OBD testing.
- **[Maggiora Bro Drilling](https://ctcfinder.com/tester/maggiora-bro-drilling-gilroy/)** — Gilroy, CA 95020 — (669) 469-9223 — 1 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.
- **[Mateo Huerta](https://ctcfinder.com/tester/mateo-huerta-gilroy/)** — Gilroy, CA 95020 — (650) 290-0652 — 1 mi. Services: mobile testing, OBD testing.
- **[Premier Diesel LLC](https://ctcfinder.com/tester/premier-diesel-llc-gilroy/)** — 6484 Automall Pkwy, Gilroy, CA 95020 — (408) 842-2999 — 1 mi. Services: OBD testing.