---
title: "Nelson's Automotive Inc. — Clean Truck Check, Ridgecrest, CA"
description: "Nelson's Automotive Inc. in Ridgecrest, CA is on CARB's Clean Truck Check tester list. Offers OBD testing, smoke opacity (non-OBD) testing. Phone, address and…"
url: "https://ctcfinder.com/tester/nelsons-automotive-inc-ridgecrest/"
updated: "2026-11-01"
publisher: "CTC Finder (independent directory, not affiliated with CARB)"
---

# Nelson's Automotive Inc.

Clean Truck Check tester in Ridgecrest, CA (Kern 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 | 325 W Inyokern Rd, Ridgecrest, CA 93555 |
| County | Kern County |
| Phone | (760) 446-3568 |
| Mobile testing | No |
| OBD testing | Yes |
| Smoke opacity (non-OBD) | Yes |
| Motorhomes | No |
| Credentialed testers | 1 |
| Last verified | 2026-11-01 |

## Which trucks Nelson's Automotive Inc. 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 | Not listed |

If you need a tester at your yard, the nearest listed tester that offers mobile testing is Brian Farris in Ridgecrest, about 1 mile away. [See listing](https://ctcfinder.com/tester/brian-farris-ridgecrest/).

## Clean Truck Check testers in Kern County

Nelson's Automotive Inc. is one of 107 testing businesses in Kern County on CARB's public tester list. 89 of them offer mobile testing and 53 do smoke opacity tests. In Ridgecrest itself there are 3 listed businesses, 2 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 Nelson's Automotive Inc. offer mobile Clean Truck Check testing?

Not according to CARB's tester list; plan to bring the truck to the tester. The nearest listed mobile tester is [Brian Farris](https://ctcfinder.com/tester/brian-farris-ridgecrest/) (about 1 mile).

### Can Nelson's Automotive Inc. test a 2012 or older diesel truck?

Yes. Nelson's Automotive Inc. 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 Nelson's Automotive Inc. charge for a Clean Truck Check?

Nelson's Automotive Inc. has not published prices with us; call (760) 446-3568 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 Nelson's Automotive Inc. a CARB-credentialed tester?

Nelson's Automotive Inc. 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

- **[Brian Farris](https://ctcfinder.com/tester/brian-farris-ridgecrest/)** — Ridgecrest, CA 93555 — (760) 382-5048 — 1 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.
- **[LG HD testing](https://ctcfinder.com/tester/lg-hd-testing-ridgecrest/)** — 717 N Inyo St, Ridgecrest, CA 93555 — (760) 793-7727 — 1 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.