---
title: "st Priority Vehicle Registration Service — Clean Truck Check, Tehachapi, CA"
description: "st Priority Vehicle Registration Service in Tehachapi, CA is on CARB's Clean Truck Check tester list. Offers mobile testing, OBD testing, motorhome testing…"
url: "https://ctcfinder.com/tester/st-priority-vehicle-registration-service-tehachapi/"
updated: "2026-11-01"
publisher: "CTC Finder (independent directory, not affiliated with CARB)"
---

# st Priority Vehicle Registration Service

Clean Truck Check tester in Tehachapi, 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 | 20725 South St STE 12, Tehachapi, CA 93561 |
| County | Kern County |
| Phone | (661) 557-1106 |
| Mobile testing | Yes |
| OBD testing | Yes |
| Smoke opacity (non-OBD) | No |
| Motorhomes | Yes |
| Credentialed testers | 1 |
| Last verified | 2026-11-01 |

## Which trucks st Priority Vehicle Registration Service 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 D&M Fleet Compliance in Tehachapi, about 1 mile away. [See listing](https://ctcfinder.com/tester/d-and-m-fleet-compliance-tehachapi/).

## Clean Truck Check testers in Kern County

st Priority Vehicle Registration Service 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 Tehachapi itself there are 3 listed businesses, 3 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 st Priority Vehicle Registration Service offer mobile Clean Truck Check testing?

Yes. st Priority Vehicle Registration Service 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 st Priority Vehicle Registration Service test a 2012 or older diesel truck?

st Priority Vehicle Registration Service does not list smoke opacity testing, which older non-OBD diesel trucks need. The nearest listed tester that does is [D&M Fleet Compliance](https://ctcfinder.com/tester/d-and-m-fleet-compliance-tehachapi/) (about 1 mile). Trucks from 2013 on get an OBD scan instead.

### How much does st Priority Vehicle Registration Service charge for a Clean Truck Check?

st Priority Vehicle Registration Service has not published prices with us; call (661) 557-1106 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 st Priority Vehicle Registration Service a CARB-credentialed tester?

st Priority Vehicle Registration Service 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

- **[D&M Fleet Compliance](https://ctcfinder.com/tester/d-and-m-fleet-compliance-tehachapi/)** — 29960 N Lower Valley Rd, Tehachapi, CA 93561 — (661) 305-6963 — 1 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.
- **[DPT Auto](https://ctcfinder.com/tester/dpt-auto-tehachapi/)** — 230 E Tehachapi Blvd, Tehachapi, CA 93561 — (661) 822-1600 — 1 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.
- **[Flavio Gonzalez](https://ctcfinder.com/tester/flavio-gonzalez-arvin/)** — Arvin, CA 93203 — (661) 432-0745 — 19 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.
- **[Big iron](https://ctcfinder.com/tester/big-iron-rosamond/)** — Rosamond, CA 93560 — (661) 643-2427 — 19 mi. Services: mobile testing, OBD testing.
- **[Snail Race Transportation LLC](https://ctcfinder.com/tester/snail-race-transportation-llc-rosamond/)** — 2156 Manchester St, Rosamond, CA 93560 — (661) 537-5376 — 19 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.
- **[Smog Axis](https://ctcfinder.com/tester/smog-axis-lamont/)** — 10011 Main St Suite B, Lamont, CA 93241 — (661) 378-4413 — 24 mi. Services: mobile testing, OBD testing, motorhome testing.