DOT/BIT Inspections

Call to schedule service in Orange County: 888-234-9742
Call to schedule service in Los Angeles County: 888-696-5162

Did You Know?
Effective January 1st 2016

California Highway Patrol (C.H.P.) Basic Inspection of Terminals (B.I.T.) are required on all Commercial Motor Vehicles (C.M.V.) with a Gross Vehicle Weight Rating (G.V.R.W.) of more than 10,001 pounds every 90 days. – Section 34501.12 of the California Vehicle Code

Additionally, all Motors Carriers must have their US D.O.T. number or CA number displayed on vehicle.




  • BIT = “Biennial Inspection of Terminals”
  • This is required by California to be performed every 90 days
  • The actual inspection is the same as the DOT inspection.
  • DOT = “Department of Transportation” inspection
  • This is required Federally to be performed annually.
  • Required annually if traveling outside of CA

For all CA drivers, you will need to perform the BIT every 90 days. However, if you’re an interstate driver that happens to be driving through California when it’s time for your annual DOT, we could perform that as well.

Interior And Exterior


Warning devices – air, oil and temperature, vacuum Check steering gear and mounting-free lash
Fire extinguisher and reflectors – secured – marked Steering arms, drag links and tie rod ends
Horn – defrosters, gauges, speedometer Fifth wheel conditioning and mounting
Mirrors and supports Springs, shackles and U-bolt-torque arms
Windshield wipers – windows cracks, condition Check frame, cross members, cracks, etc.
Check all lights – turn signals – reflectors, mud flaps Drive shaft and universal joints
Check electrical wiring – condition and protection Transmission, differential-mounting and seals
Check batteries – water terminals and cable Wheel seals leaks, hydraulic brake system leaks
Clean under carriage

Engine and Electric


Radiator and water hoses – condition – leaks Lights – stop, tail, turn-reflectors
Belt – compressor(s), fan and water pump Air leaks – brake system
Air lines – leaks, condition and protection Air leaks – dump system
Fuel tanks – lines – pump, condition and protection Cracks in body and sub frame
Manifold and flange gaskets – muffler and condition Brakes – adjustment – drums – near cam over
Engine mounts, oil and fuel leaks Springs U-bolts-torque arm
Clutch adjustment and free play Drawbar – hitch and safety cable – check strand wear
Throttle and linkage, air filter Fifth wheel on pull trailer
Generator/alternator, starter, brushes and wiring Tires wheel nuts and studs
Fifth wheel on pin wear-safety lock
Brakes Emergency relay valves, tank mounting
Tractor protection valve-breakaway test Tarps
Brakes – lining, drums and adjustment – near cam over, pedal ht-hyd Electrical connections – lead wire
Hoses and tubing condition – protection, hyd., brake reservoir level Air lines – between trailers, gladhands, rubbers
Air leaks and 1-minute brake application test, vaccum loss Mudflaps, fenders
Air governor adjustment – minimum 85 maximum 130
Identify number 1 air tank – drain – test check valve
All tanks secure, drains operable, drain tanks
Check tires, wheel nuts and studs, cracked secure and inflation, tread
Parking brake – condition and adjustment
Emergency stopping system – labeled, operable
Release after loss of service air – test anti skid lamp