Maintenance, periodic inspections and BIT

Routine maintenance, periodic inspection and California’s 90-day inspections have distinct rules. Schedule the applicable vehicles, intervals and retention periods separately.

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12 / MAINTENANCE, PERIODIC INSPECTIONS AND BIT

Maintenance, periodic inspections and BIT

Routine maintenance, periodic inspection and California’s 90-day inspections have distinct rules. Schedule the applicable vehicles, intervals and retention periods separately.

Routine maintenance, periodic inspection and California’s 90-day inspections have distinct rules. Schedule the applicable vehicles, intervals and retention periods separately.

Scope

Federal portions concern vehicles covered by Part 396. California portions concern vehicles listed in CVC §34505.5, subject to §34501.12 responsibility and exemptions. A BIT terminal inspection is distinct from an individual vehicle’s 90-day inspection.

01

Start with these requirements

The carrier must keep both a maintenance schedule and completed inspection and repair records

CTAC PLAIN-LANGUAGE EXPLANATION
What the rule requires
Carriers must systematically inspect, repair and maintain vehicles. For covered vehicles controlled for at least 30 consecutive days, record scheduled/due work and the date and nature of completed inspections and repairs; generally retain these records for one year and six months after control ends.

(a) (a) General. Every motor carrier and intermodal equipment provider must systematically inspect, repair, and maintain, or cause to be systematically inspected, repaired, and maintained, all motor vehicles and intermodal equipment subject to its control.

(a)(1) (1) Parts and accessories shall be in safe and proper operating condition at all times. These include those specified in part 393 of this subchapter and any additional parts and accessories which may affect safety of operation, including but not limited to, frame and frame assemblies, suspension systems, axles and attaching parts, wheels and rims, and steering systems.

(b) (b) Required records. Motor carriers, except for a private motor carrier of passengers (nonbusiness), must maintain, or cause to be maintained, records for each motor vehicle they control for 30 consecutive days. Intermodal equipment providers must maintain or cause to be maintained, records for each unit of intermodal equipment they tender or intend to tender to a motor carrier. These records must include:

(b)(2) (2) A means to indicate the nature and due date of the various inspection and maintenance operations to be performed;

(b)(3) (3) A record of inspection, repairs, and maintenance indicating their date and nature; and

(c) Record retention. The records required by this section shall be retained where the vehicle is either housed or maintained for a period of 1 year and for 6 months after the motor vehicle leaves the motor carrier's control.

Read the full section (English)

Uses a fixed source edition; check the original and statutory history for operative dates and exceptions.

Each covered tractor, trailer, and other combination unit must separately pass periodic inspection

CTAC PLAIN-LANGUAGE EXPLANATION
What the rule requires
Subject to provisions such as §396.23, the vehicle must have passed the required periodic inspection within the preceding 12 months, with compliant documentation on the vehicle. A compliant tractor does not establish compliance of its trailer or converter dolly.

(a) (a) Every commercial motor vehicle must be inspected as required by this section. The inspection must include, at a minimum, the parts and accessories set forth in appendix A to this part. The term commercial motor vehicle includes each vehicle in a combination vehicle. For example, for a tractor semitrailer, full trailer combination, the tractor, semitrailer, and the full trailer (including the converter dolly if so equipped) must each be inspected.

(b) (b) Except as provided in § 396.23 and this paragraph, motor carriers must inspect or cause to be inspected all motor vehicles subject to their control. Intermodal equipment providers must inspect or cause to be inspected intermodal equipment that is interchanged or intended for interchange to motor carriers in intermodal transportation.

(c) (c) A motor carrier must not use a commercial motor vehicle, and an intermodal equipment provider must not tender equipment to a motor carrier for interchange, unless each component identified in appendix A to this part has passed an inspection in accordance with the terms of this section at least once during the preceding 12 months and documentation of such inspection is on the vehicle. The documentation may be:

(c)(1) (1) The inspection report prepared in accordance with § 396.21(a), or

(c)(2) (2) Other forms of documentation, based on the inspection report (e.g., sticker or decal), which contains the following information:

Read the full section (English)

Uses a fixed source edition; check the original and statutory history for operative dates and exceptions.

Inspect covered California vehicles at least every 90 days

CTAC PLAIN-LANGUAGE EXPLANATION
What the rule requires
Covered vehicles must be inspected at least every 90 days, or more often as necessary, including brake adjustment/system leaks, steering and suspension, tires/wheels and coupling devices. Correct listed defects and obtain the authorized carrier representative’s certification before resuming highway operation as required. Retain records for two years.
Conditions and exceptions
Vehicles out of service for more than 90 calendar days need not repeat the 90-day interval while idle, but must be inspected before highway operation. Check paragraph (b) for the specific repair-location provision.

(a) (a) Motor carriers operating any vehicle described in subdivision (a), (b), (e), (f), (g), or (k) of Section 34500, except those vehicles exempted under Section 34501.12, shall, as a part of the systematic inspection, maintenance, and lubrication services required of all motor carriers, require the vehicle or vehicles for which it is responsible pursuant to Section 34501.12 to be inspected at least every 90 days, or more often if necessary to ensure safe operation. Vehicles that are out of service for periods greater than 90 calendar days are not required to be inspected at 90-day intervals if they are inspected before operation on the highway. This inspection shall include, but not be limited to, all of the following:

(a)(1) (1) Brake adjustment.

(a)(2) (2) Brake system components and leaks.

(a)(3) (3) Steering and suspension systems.

(a)(4) (4) Tires and wheels.

(a)(5) (5) Vehicle connecting devices.

(b) (b) No vehicle subject to this section shall be operated on the highway other than to a place of repair until all defects listed during the inspection conducted pursuant to subdivision (a) have been corrected and attested to by the signature of the motor carrier’s authorized representative.

(c) (c) Records of inspections conducted pursuant to subdivision (a) shall be kept at the motor carrier’s terminals, as designated in accordance with Section 34501.12. The records shall be retained by the motor carrier for two years, and shall be made available for inspection upon request by any authorized employee of the department. Each record shall include, but not be limited to, all of the following:

Read the full section (English)

Uses a fixed source edition; check the original and statutory history for operative dates and exceptions.

WORKED EXAMPLE

02

Returning a trailer to service after months idle

Illustrative scenario: a carrier wants to return a long-idle trailer to service while the tractor’s annual inspection remains current.

  1. Check each unit

    Check the trailer’s periodic inspection and California inspection applicability separately; do not rely on the tractor’s sticker.

  2. Inspect and repair before return

    For covered long-idle equipment, complete inspection, defect correction and records before highway operation.

Inspection work can be coordinated, but one requirement does not automatically replace another.

03

Common mistakes in day-to-day work

“An annual inspection replaces the 90-day inspection”

Their intervals, scope and inspection requirements differ; check compliance with each applicable rule separately.

Full text and sources

REGULATION TEXT · ENGLISH

§ 396.3 Inspection, repair, and maintenance.

§ 396.3 Inspection, repair, and maintenance.

Source:www.ecfr.gov49 CFR 396.3
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Source edition date
2026-10-06
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Edition noteOfficial-source snapshot; current consolidated law and subsequent amendments have not been verified.

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REGULATION TEXT · ENGLISH

§ 396.17 Periodic inspection.

§ 396.17 Periodic inspection.

Source:www.ecfr.gov49 CFR 396.17
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Source edition date
2026-10-06
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REGULATION TEXT · ENGLISH

California Vehicle Code § 34505.5

California Vehicle Code § 34505.5

Source:leginfo.legislature.ca.govCA Vehicle Code § 34505.5
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Not provided
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Drafted from linked official texts and agency guidance. Both language interpretations are CTAC AI-assisted drafts pending human review; examples are illustrative, not member records. Capture dates are not legal effective dates.

CTAC plain-language explanations are not official translations or case-specific legal advice. Check scope, source editions and current official notices.