---
title: "A. 1 Stop Smog Shop — Clean Truck Check, Riverside, CA"
description: "A. 1 Stop Smog Shop in Riverside, CA is on CARB's Clean Truck Check tester list. Offers mobile testing, OBD testing, motorhome testing. Phone, address and…"
url: "https://ctcfinder.com/tester/a-1-stop-smog-shop-riverside/"
updated: "2026-11-01"
publisher: "CTC Finder (independent directory, not affiliated with CARB)"
---

# A. 1 Stop Smog Shop

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 | 8432 Magnolia Ave, Riverside, CA 92504 |
| County | Riverside County |
| Phone | (760) 792-0307 |
| Mobile testing | Yes |
| OBD testing | Yes |
| Smoke opacity (non-OBD) | No |
| Motorhomes | Yes |
| Credentialed testers | 1 |
| Last verified | 2026-11-01 |

## Which trucks A. 1 Stop Smog Shop 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 | Not listed |
| California-registered motorhome | Same test as above by engine year, once a year | Yes |

For a 2012 or older diesel, the nearest listed tester with smoke opacity testing is Brad Ramelot in Riverside, about 1 mile away. [See listing](https://ctcfinder.com/tester/brad-ramelot-riverside/).

## Clean Truck Check testers in Riverside County

A. 1 Stop Smog Shop 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 A. 1 Stop Smog Shop offer mobile Clean Truck Check testing?

Yes. A. 1 Stop Smog Shop 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 A. 1 Stop Smog Shop test a 2012 or older diesel truck?

A. 1 Stop Smog Shop does not list smoke opacity testing, which older non-OBD diesel trucks need. The nearest listed tester that does is [Brad Ramelot](https://ctcfinder.com/tester/brad-ramelot-riverside/) (about 1 mile). Trucks from 2013 on get an OBD scan instead.

### How much does A. 1 Stop Smog Shop charge for a Clean Truck Check?

A. 1 Stop Smog Shop has not published prices with us; call (760) 792-0307 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 A. 1 Stop Smog Shop a CARB-credentialed tester?

A. 1 Stop Smog Shop 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

- **[A&F Growers](https://ctcfinder.com/tester/a-and-f-growers-riverside/)** — 1803 Adams St, Riverside, CA 92504 — (951) 283-1213 — 1 mi. Services: not listed.
- **[ABEs Clean Truck Check](https://ctcfinder.com/tester/abes-clean-truck-check-riverside/)** — 6925 Barcelona Way, Riverside, CA 92504 — (909) 702-8232 — 1 mi. Services: mobile testing, OBD testing, motorhome testing.
- **[Brad Ramelot](https://ctcfinder.com/tester/brad-ramelot-riverside/)** — Riverside, CA 92504 — (951) 830-4661 — 1 mi. Services: mobile testing, smoke opacity (non-OBD) testing, motorhome testing.
- **[Carlos Valencia](https://ctcfinder.com/tester/carlos-valencia-riverside/)** — Riverside, CA 92504 — (951) 315-5477 — 1 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing.
- **[Engine Compliance East](https://ctcfinder.com/tester/engine-compliance-east-riverside/)** — 6331 Chattanooga Dr, Riverside, CA 92504 — (818) 400-3646 — 1 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.
- **[Esteban Garcia](https://ctcfinder.com/tester/esteban-garcia-riverside/)** — Riverside, CA 92504 — (951) 605-2031 — 1 mi. Services: mobile testing, OBD testing, motorhome testing.