---
title: "Md Mechanical and Machine — Clean Truck Check, Riverside, CA"
description: "Md Mechanical and Machine in Riverside, 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/md-mechanical-and-machine-riverside/"
updated: "2026-11-01"
publisher: "CTC Finder (independent directory, not affiliated with CARB)"
---

# Md Mechanical and Machine

Clean Truck Check tester in Riverside, CA (Riverside 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 | 455 W La Cadena Dr Suite 10, Riverside, CA 92501 |
| County | Riverside County |
| Phone | (951) 377-1544 |
| Mobile testing | Yes |
| OBD testing | Yes |
| Smoke opacity (non-OBD) | Yes |
| Motorhomes | Yes |
| Credentialed testers | 1 |
| Last verified | 2026-11-01 |

## Which trucks Md Mechanical and Machine 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 Riverside County

Md Mechanical and Machine is one of 251 testing businesses in Riverside County on CARB's public tester list. 233 of them offer mobile testing and 102 do smoke opacity tests. In Riverside itself there are 48 listed businesses, 45 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 Md Mechanical and Machine offer mobile Clean Truck Check testing?

Yes. Md Mechanical and Machine 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 Md Mechanical and Machine test a 2012 or older diesel truck?

Yes. Md Mechanical and Machine 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 Md Mechanical and Machine charge for a Clean Truck Check?

Md Mechanical and Machine has not published prices with us; call (951) 377-1544 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 Md Mechanical and Machine a CARB-credentialed tester?

Md Mechanical and Machine 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

- **[DriveDirect Pro, LLC](https://ctcfinder.com/tester/drivedirect-pro-llc-riverside/)** — 3600 Lime St, Riverside, CA 92501 — (866) 971-8378 — 1 mi. Services: mobile testing, OBD testing, motorhome testing.
- **[Santiago Truck Repair](https://ctcfinder.com/tester/santiago-truck-repair-riverside/)** — 3655 Placentia Ln, Riverside, CA 92501 — (909) 470-9271 — 1 mi. Services: mobile testing.
- **[Aaron’s Diesel Pro](https://ctcfinder.com/tester/aarons-diesel-pro-riverside/)** — 200 W Big Springs Rd, Riverside, CA 92507 — (951) 201-6522 — 4 mi. Services: mobile testing, OBD testing, motorhome testing.
- **[Carb Compliant Solutions](https://ctcfinder.com/tester/carb-compliant-solutions-riverside/)** — 19871 Sunkissed Ridge Dr, Riverside, CA 92507 — (951) 547-9465 — 4 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.
- **[CCW](https://ctcfinder.com/tester/ccw-riverside/)** — 1863 Service Ct, Riverside, CA 92507 — (951) 684-9585 — 4 mi. Services: smoke opacity (non-OBD) testing.
- **[Credentialed tester in Riverside](https://ctcfinder.com/tester/credentialed-tester-in-riverside-riverside/)** — 5053 La Mart Dr, Riverside, CA 92507 — (951) 594-5882 — 4 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.