California requires motor carriers to have each commercial vehicle inspected at least once every 90 days. This is one of the most fundamental compliance requirements under the state’s BIT program, and it is one of the most common reasons carriers run into problems during a CHP terminal review.
If you operate trucks in California, this inspection is a scheduled obligation with documented proof that must be on file for every vehicle in your fleet.
California’s Requirement Behind 90-Day BIT Inspections
A 90-day BIT inspection is a periodic safety inspection required under California’s Basic Inspection of Terminals program. Under 13 CCR 1229, motor carriers must inspect each power unit at least once every 90 days. The inspection must cover a defined set of vehicle components, and a written record of findings must be kept on file and available for review.
The cycle applies to each vehicle individually. If one truck in your fleet was inspected 80 days ago and another was inspected 110 days ago, the second one is already out of compliance, regardless of how the rest of the fleet looks.
CHP Motor Carrier Specialists review these records during terminal inspections. Missing documentation or outdated inspection dates are a direct path to enforcement action and, depending on the pattern, increased inspection frequency.
Who Is Required to Have Inspections
The 90-day inspection requirement applies to motor carriers subject to California’s BIT program. That includes:
- For-hire carriers operating commercial vehicles in California
- Private carriers with vehicles above the applicable weight threshold
- Owner-operators with vehicles registered in the state or running California routes
- Out-of-state carriers whose trucks operate within California
The requirement follows the vehicle and where it operates, not just where the business is headquartered. A carrier based in Nevada with trucks running loads into California falls under the same rules as a California-based fleet.
If you move commercial freight in California, it is safe to assume the 90-day inspection requirement applies to you.
Questions about whether your operation is subject to BIT requirements?
Contact us for a free initial consultation. We can answer that in a short conversation.
What a 90-Day BIT Inspection Covers
The inspection covers the major safety systems on each commercial vehicle. A complete inspection typically includes:
- Brakes (service, parking, and emergency systems)
- Tires (tread depth, condition, and inflation)
- Lights and reflectors (headlights, taillights, turn signals, and clearance lights)
- Steering components
- Suspension systems
- Coupling devices on tractor-trailer combinations
- Fuel system components
Every inspection must be documented in writing. The record needs to include the inspection date, vehicle identification, any deficiencies noted, and the corrective action taken. Deficiencies must be repaired before the vehicle returns to service.
The CHP Terminal Manager’s Compliance Checklist is a useful reference for what inspectors expect to find in your records when they conduct a terminal review.
How to Stay Ahead of the 90-Day Cycle
Most compliance problems with this requirement are not caused by negligence. They come from poor tracking. When you’re managing a fleet of any size, individual vehicle inspection dates can slip without an organized system in place.
A few practices that keep carriers on schedule:
- Add the 90-day cycle to your fleet maintenance calendar, with reminders at day 75 to allow time for scheduling
- Keep inspection records in a consistent format that any staff member can locate and verify during an audit
- Assign one person the responsibility of owning the inspection calendar
- Review each vehicle’s last inspection date as part of any dispatch or pre-trip process
During a BIT terminal review, CHP Motor Carrier Specialists will pull inspection records and verify currency for every vehicle in your fleet. If the paperwork cannot be located quickly, the result is the same as if the inspection was never done.
What Happens When a Vehicle Is Overdue
Missing the 90-day deadline on a single vehicle can create problems during an otherwise routine terminal inspection. Inspectors document deficiencies, and patterns of incomplete records affect a carrier’s safety performance rating.
Carriers with strong compliance records are reviewed less frequently. Carriers with repeated documentation gaps may be subject to more inspections, follow-up reviews, and closer enforcement attention over time.
The 90-day inspection is a manageable task. The cost of ignoring it is not.
How We Support 90-Day Inspection Compliance
We help carriers build the documentation systems that hold up when a CHP inspector arrives. Our team came from the enforcement side of this program before moving to carrier consulting, which means we know exactly what inspectors look for when they pull your records. Learn more about our BIT inspection support services.
We can review your current inspection records, identify vehicles approaching their 90-day mark, and help you build a tracking process that prevents gaps from forming. If a CHP review is scheduled or expected, we can also work directly with your team to prepare.
For carriers who want to take a broader look at their compliance posture, our training and seminars cover BIT program requirements, documentation standards, and inspection readiness for fleet staff.
Ready to get your inspection records in order?
Call us at (541) 761-8619 or visit our BIT Inspections & Audits page
to learn how we can help your operation stay compliant year-round.