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Diesel trucks and buses with a gross vehicle weight rating(GVWR) that are greater than 14,000 pounds (lbs), must reduce exhaust emissions by meeting particulate matter (PM) filter requirements and upgrading to a 2010 or newer engine model year (EMY).
The Regulation applies to:
What does the regulation require?
If you own a diesel vehicle, the regulation requires you to take steps to reduce emissions. Nearly all diesel vehicles with a manufacturer’s gross vehicle weight rating greater than 14,000 pounds that operate in California are required to meet certain compliance requirements per the regulation. To comply with these requirements, you can upgrade to 2010 model year or newer diesel engines, or to vehicles that operate on other fuels. You may also be able to purchase a replacement engine to repower your older vehicle.
What is the manufacturer delay extension?
If a vehicle owner has a vehicle that must be replaced or upgraded to meet Truck and Bus regulatory requirements, and the vehicle owner has purchased the necessary replacement or upgrade, the manufacturer delay extension specified in section 2025(p)(8) of the regulation allows the vehicle owner to continue to use the existing vehicle if the replacement or upgrade is unavailable due to a manufacturer delay. You must have purchased the replacement engine or replacement vehicle on or before September 1 before the initial compliance date for the existing vehicle that is to be replaced or upgraded. If the delivery of a replacement vehicle (or replacement engine) is delayed by the manufacturer, then the vehicle owner may continue to operate temporarily the existing vehicle that is to be replaced until the replacement vehicle or engine is delivered. During the open reporting period in January, you must meet the applicable reporting and record keeping requirements of sections 2025(r) and (s) of the regulation and submit proof of the purchase to use the extension. The vehicle owner cannot continue to operate the existing non-compliant vehicle once the replacement vehicle is delivered.
What purchase agreements qualify?
The purchase agreement used to qualify for the manufacturer delay extension must be a written and legally binding contract signed on or before September 1 before the initial compliance date for the vehicle being replaced. The purchase contract must identify that a specific compliant vehicle or specific engine was purchased, the date of the purchase, and it must be for immediate delivery or delivery by December 31 or earlier. Letters of intent or other agreements that are not binding or are contingent upon other decisions that remain unresolved as of September 1 are not sufficient to qualify for the extension.
What if I cancel a purchase agreement?
If a vehicle owner claims the manufacturer delay extension and later the vehicle owner cancels the original purchase agreement used to qualify for the extension, the claim for the extension will be treated as invalid, the vehicle owner will be out of compliance as if the agreement was never executed, and the vehicle owner could be subject to enforcement action. The manufacture delay extension cannot be claimed if you modify the original purchase agreement after September 1. If a vehicle manufacturer cancels an existing purchase agreement or makes changes beyond the purchaser’s control, the owner must contact CARB immediately for assistance with the manufacturer delay extension.
Do I have to meet reporting requirements?
Yes, you must report in CARB’s Truck Regulation Upload, Compliance, and Reporting System (TRUCRS) to take advantage of compliance flexibility each January. The vehicle owner must report by January 31 of the applicable compliance year to claim the manufacturer delay extension for the affected vehicle. The vehicle owner must report information about the vehicle to be replaced or repowered and the date the new equipment order was made. The vehicle owner must also keep records of the purchase and make the records available to CARB staff upon request. The owner has 30 days from receipt of the replacement vehicle or engine to report the appropriate changes to the fleet to demonstrate compliance. In the case of an engine replacement, the vehicle owner must update the vehicle information to identify the new engine and OEM filter installed in the affected vehicle. In the case that the vehicle is replaced, the owner must report information about the replacement vehicle and the date the non-compliant vehicle is sold, scrapped, or retired.
Does the manufacturer delay extension impact grant funding?
During the manufacturer delay extension period, the vehicle that is to be replaced and qualifies for the manufacturer delay extension is treated the same as if it is compliant with the regulation.
Where can I get more information?
You can obtain additional information, at the Truck and Bus Regulation program page, or by calling 866-6DIESEL (866-634-3735), or by emailing the 8666 Diesel Hotline (8666diesel@arb.ca.gov). Contact us if wish to obtain this document in an alternative format or language. TTY/TDD/ Speech to Speech users may dial 711 for the California Relay Service.
Printable Manufacturer Delay Factsheet
Engine Model Year |
Engine Size (Liters) |
Cummins Engine |
Engine Family |
Date Recall Takes Effect |
---|---|---|---|---|
2010 |
6.7 |
ISB |
ACEXH0408BAH |
03/24/2019 |
6.7 |
RAM 3500 Cab Chassis |
ACEXH0408BAK |
01/08/19 |
|
6.7 |
RAM 4500/5500 Cab Chassis |
ACEXH0408BAL |
1Q2019 |
|
6.7 |
ISB - Urban Bus Hybrid |
ACEXH0408BAN |
03/24/2019 |
|
8.3 |
ISC |
ACEXH0505CAC |
03/24/2019 |
|
8.9 |
ISL9 |
ACEXH0540LAQ |
03/24/2019 |
|
8.9 |
ISL9 - Urban Bus |
ACEXH0540LAR |
03/24/2019 |
|
11.9 |
ISX 12 |
ACEXH0729XAA |
09/28/2018 |
|
11.9 |
ISX 12 |
ACEXH0729XAB |
09/28/2018 |
|
11.9 |
ISX 12 |
ACEXH0729XAC |
09/28/2018 |
|
14.9 |
ISX 15 |
ACEXH0912XAQ |
08/01/2018 |
|
14.9 |
ISX 15 |
ACEXH0912XAR |
09/28/2018 |
|
2011 |
6.7 |
ISB |
BCEXH0408BAH |
03/24/2019 |
6.7 |
RAM 3500 Cab Chassis |
BCEXH0408BAK |
01/08/19 |
|
6.7 |
RAM 4500/5500 Cab Chassis |
BCEXH0408BAL |
01/08/19 |
|
6.7 |
ISB - Urban Bus Hybrid |
BCEXH0408BAN |
03/24/2019 |
|
8.3 |
ISC |
BCEXH0505CAC |
03/24/2019 |
|
8.9 |
ISL9 |
BCEXH0540LAQ |
03/24/2019 |
|
8.9 |
ISL9 - Urban Bus |
BCEXH0540LAR |
03/24/2019 |
|
8.9 |
ISL9 |
BCEXH0540LAS |
03/24/2019 |
|
11.9 |
ISX 12 |
BCEXH0729XAA |
09/28/2018 |
|
11.9 |
ISX 12 |
BCEXH0729XAB |
09/28/2018 |
|
11.9 |
ISX 12 |
BCEXH0729XAC |
09/28/2018 |
|
11.9 |
ISX 12 – Urban Bus |
BCEXH0729XAD |
09/28/2018 |
|
14.9 |
ISX 15 |
BCEXH0912XAQ |
08/01/2018 |
|
14.9 |
ISX 15 |
BCEXH0912XAR |
09/28/2018 |
|
14.9 |
ISX 15 |
BCEXH0912XAS |
08/01/2018 |
|
2012 |
6.7 |
ISB |
CCEXH0408BAH |
03/24/2019 |
6.7 |
RAM 3500 Cab Chassis |
CCEXH0408BAK |
01/08/19 |
|
6.7 |
RAM 4500/5500 Cab Chassis |
CCEXH0408BAL |
01/08/19 |
|
6.7 |
ISB - Urban Bus Hybrid |
CCEXH0408BAN |
03/24/2019 |
|
6.7 |
ISB |
CCEXH0408BAO |
03/24/2019 |
|
8.3 |
ISC |
CCEXH0505CAC |
03/24/2019 |
|
8.9 |
ISL9 |
CCEXH0540LAQ |
03/24/2019 |
|
8.9 |
ISL9 - Urban Bus |
CCEXH0540LAR |
03/24/2019 |
|
8.9 |
ISL9 |
CCEXH0540LAS |
03/24/2019 |
|
11.9 |
ISX 12 |
CCEXH0729XAA |
09/28/2018 |
|
11.9 |
ISX 12 |
CCEXH0729XAB |
09/28/2018 |
|
11.9 |
ISX 12 |
CCEXH0729XAC |
09/28/2018 |
|
11.9 |
ISX 12 - Urban Bus |
CCEXH0729XAD |
09/28/2018 |
|
14.9 |
ISX 15 |
CCEXH0912XAQ |
08/01/2018 |
|
14.9 |
ISX 15 |
CCEXH0912XAR |
09/28/2018 |
|
14.9 |
ISX 15 |
CCEXH0912XAS |
08/01/2018 |
|
2013 |
6.7 |
RAM 2500-3500 (MDV) |
DCEXD06.78VV |
2017 |
6.7 |
RAM 3500 (MDV) |
DCEXD06.78WV |
2017 |
|
6.7 |
ISB, ISB Hybrid |
DCEXH0408BAP |
03/24/2019 |
|
6.7 |
ISB Hybrid |
DCEXH0408BAR |
03/24/2019 |
|
6.7 |
RAM 3500 Cab Chassis |
DCEXH0408BAQ |
01/08/19 |
|
6.7 |
RAM 4500/5500 Cab Chassis |
DCEXH0408BAS |
01/08/19 |
|
8.9 |
ISL9, ISL9 Hybrid (Urban Bus) |
DCEXH0540LAT |
2017 |
|
8.9 |
ISL9, ISL9 Hybrid |
DCEXH0540LAV |
03/24/2019 |
|
11.9 |
ISX 12 |
DCEXH0729XAE |
09/28/2018 |
|
11.9 |
ISX 12 Urban Bus |
DCEXH0729XAF |
09/28/2018 |
|
2014 |
6.7 |
RAM 2500-3500 (MDV) |
ECEXD06.78VV |
2017 |
6.7 |
RAM 3500 (MDV) |
ECEXD06.78WV |
2017 |
|
6.7 |
ISB, ISB Hybrid |
ECEXH0408BAP |
03/24/2019 |
|
6.7 |
ISB Hybrid |
ECEXH0408BAR |
03/24/2019 |
|
6.7 |
RAM 3500 Cab Chassis |
ECEXH0408BAQ |
01/08/19 |
|
6.7 |
RAM 4500/5500 Cab Chassis |
ECEXH0408BAS |
01/08/19 |
|
8.9 |
ISL9, ISL9 Hybrid (Urban Bus) |
ECEXH0540LAT |
2017 |
|
8.9 |
ISL9, ISL9 Hybrid |
ECEXH0540LAV |
03/24/2019 |
|
2015 |
6.7 |
RAM 2500-3500 (MDV) |
FCEXD06.78VV |
2017 |
6.7 |
RAM 3500 (MDV) |
FCEXD06.78WV |
2017 |
|
6.7 |
RAM 3500 Cab Chassis |
FCEXH0408BAQ |
01/08/19 |
|
6.7 |
RAM 4500/5500 Cab Chassis |
FCEXH0408BAS |
01/08/19 |
The Regulation compliance schedule is based on the year of the current engine(s). Older vehicles will need to be replaced or repowered with a 2010 or newer engine following the schedule below, unless it is exempt from the Regulation. There are also filter requirements for larger vehicles.
There are two schedules, one for lighter vehicles and one for heavier vehicles. Inspect the vehicle’s door jamb to determine the GVWR and if it falls in the lighter or heavier category.
Note: Engines are manufactured separately from the vehicle chassis and typically are one year older than the vehicle model year (VMY). The Regulation regulates the engine model year (EMY) but DMV registration will be denied based on VMY, with the assumption that VMY is one year newer than the EMY. If the EMY is not one year older than the VMY, extra steps may be necessary to avoid early registration denial.
Check Engine Compliance ►
Find out if or when your vehicle is subject to DMV registration denials or holds.
Currently, there are limited options available. These options require reporting in CARB's TRUCRS reporting system. If a vehicle does not qualify for these options, it must follow the engine model year compliance schedule.
Low-Use Exemption:
Low-use vehicles are vehicles that travel less than 1,000 miles per year, including vehicles that are not operated (even if they have a non-op registration). A vehicle that travels more than 1,000 miles annually can use the low-use vehicle exemption as long as it operates less than 1,000 miles within California each year. The low-use option allows the vehicle to be exempt from PM filter and engine replacement requirements. Annual odometer reporting in TRUCRS is required to demonstrate compliance with this option. Third party records must be kept and provided upon request to obtain and maintain this exemption.
Low-use Exemption Fact Sheet
NOx Exempt Area Flexibility Option:
Beginning January 1, 2020, vehicles can remain under the NOx Exempt Area option and avoid vehicle replacement or they can be upgraded based on the Engine Model Year Compliance Schedule to operate statewide. Annual reporting in TRUCRS is required to demonstrate compliance with this option. There are limited circumstances under which a PM filter can be newly installed on a vehicle and be considered to meet the final requirements of the regulation if they operate solely in NOx Exempt Areas. Eligibility must first be determined.
NOx Exemption Area Fact Sheet
In 2014, to void the flexibility options provided in the 2014 amendments to the Regulation, John R. Lawson Rock and Oil of Fresno (Lawson) and the California Trucking Association (CTA) sued CARB in Fresno County Superior court.
In 2016, that court ruled in favor of Lawson and CTA, ordering CARB to set aside the regulation’s 2014 amendments. CARB appealed that decision to the 5th District court of Appeals. On January 31, 2018, the appellate court issued its decision upholding parts of the lower court’s ruling, including the court’s direction to set aside the regulation’s 2014 amendments.
If vehicles in your fleet are using one or more of the flexibility options that CARB added or amended in 2014, you will be impacted by the court’s decision.
More Information ►
Beginning January 1, 2020, the Regulation will be enforced through a new automatic process. Legislation passed in 2017, requires that the California Department of Motor Vehicles(DMV) check that vehicles are compliant with, or exempt from, the Regulation. If a vehicle is not compliant with the rule, DMV can no longer register that vehicle. The new DMV compliance verification process will better enforce the Regulation, protect public health and level the playing field for businesses throughout California.
When non-compliant vehicle owners receive their registration renewal notices from DMV, it will include a warning stating that the vehicle is CARB Non-Compliant. If the vehicle is not compliant, the vehicle owner may be able to pay the registration fee to receive a 90-day Temporary Operating Permit (TOP) from DMV. The 90-day period starts on the day the current vehicle registration expires. While the vehicle owner can drive during this period, the vehicle is still not compliant with CARB’s Truck & Bus Regulation and could still be cited. The TOP is not a compliance extension; CARB considers a TOP permit the final opportunity to either demonstrate or achieve compliance with the Truck & Bus Regulation.
The Truck and Bus Regulation is California law. CARB’s staff, management, executive officers, and board members are all bound by the requirements of the regulation and do not have the authority to offer any additional extensions or exceptions not already provided for in the law.
More Information ►
Frequently Asked Questions ►
DMV Registration Renewal Notice FAQ ►
Check Engine Compliance ►
DPF/soot filters (diesel particulate filter, VDECS, PM filter, exhaust retrofit)