Mobile Sources Certification Programs

This page last reviewed November 17, 2014



New motor vehicles and engines must be certified by the California Air Resources Board (ARB) for emission compliance before they are legal for sale, use, or registration in California. Certification is granted annually to individual engine families and is good for one model year. The following mobile sources are presently subject to ARB's emission certification: passenger cars (PC), light-duty trucks (LDT), medium-duty vehicles (MDV), on-road and off-road motorcycles (ONMC and OFMC, respectively), all-terrain vehicles (ATV), heavy-duty engines and vehicles (HDE and HDV, respectively), off-road heavy-duty diesel engine (OFHDDE) over 175 horsepower, small off-road engine (SORE) less than 25 horsepower, large spark-ignition engine (LSIE) greater than 25 horsepower, and spark-ignition marine engine (SIME). Please click one of the links below to find the certification data for the category you are interested.

What's New

Posted October 28, 2014:

ARB staff will hold a public workshop to discuss the proposed optional streamlined certification process for carryover and partial carryover certification applications applicable to new vehicles, engines, and equipment.

The workshop will be held via webinar only at the following date and time:

Date: Tuesday, November 18, 2014
Time: 9:30 a.m. - 12:00 p.m. (Pacific Time)
Location: Webinar only (GoToMeeting)

Please follow this link for instructions on registering and attending the online workshop via GoToWebinar:
GoToWebinar Online Registration

The presentation, workshop notice, and attachment may be found here: