The bill tells EPA to rewrite certain diesel rules within 180 days. It allows limited cold-weather suspension of some shutdown features and gives year-round DEF-related exemptions in certain northern or prolonged-freeze conditions. Other emissions standards stay in place.
Modern Action explains what the legislation does, helps you choose whether to support, oppose, or ask for changes, and drafts a message tied to the bill, your stance, and the elected officials who can act on it.
Cold Weather Diesel Reliability Act of 2025 is a Senate bill in committee. The latest recorded action: Committee on Environment and Public Works. Hearings held.
Latest action on S. 3135: Committee on Environment and Public Works. Hearings held.
Who this affects: This bill mainly affects people and organizations that build, use, regulate, or depend on diesel vehicles and equipment in very cold places. Its biggest effects fall on manufacturers, fleets, workers, and communities in remote or northern regions where an automatic power cut or shutdown could create safety or reliability problems.
Why this matters: In very cold places, diesel emissions-control systems can create practical problems if they trigger automatic engine power reduction or shutdown when a vehicle or machine is still urgently needed. This bill matters because it tries to balance emissions enforcement with safety, equipment reliability, and continued transportation in remote areas. It could reduce the risk of vehicles or machinery losing power in dangerous conditions, but it could also increase diesel emissions in the affected situations, and the bill does not quantify that environmental effect.
You do not have to start with a blank letter. Modern Action turns the bill, your position, and the relevant congressional context into a message you can edit and send. The goal is to make contacting Congress clear, specific, and useful without forcing you to parse bill text or figure out the right office on your own.
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Officially: Cold Weather Diesel Reliability Act of 2025
The bill tells EPA to rewrite certain diesel rules within 180 days. It allows limited cold-weather suspension of some shutdown features and gives year-round DEF-related exemptions in certain northern or prolonged-freeze conditions. Other emissions standards stay in place.
Use this page to support, oppose, or ask Congress to amend S3135. Modern Action explains what the bill does, helps identify the right senators or representative, and drafts a bill-specific message you can edit and send.
Where it stands
Sitting in Environment and Public Works
No vote scheduled. Constituent contact is what moves bills out of committee.
↓ Why your message matters here
This bill is sitting in committee with no scheduled vote — which means a small number of constituent messages can decide whether it moves forward or quietly dies.
Enter your ZIP to see how your senators and member of Congress have voted, sponsored, or spoken on this bill.
Where this bill is in the process
Introduced
Introduced in Senate
Senate Committee
Under Senate committee consideration
Latest: Read twice and referred to the Committee on Environment and Public Works. (11/6/2025)
Senate Floor Vote
Voted on by Senate
Passed Senate
Approved by Senate
House Review
Sent to House for consideration
Passed Both Chambers
Approved by both House and Senate
Signed into Law
Signed by the President
For more detail
Choose one clear position: support, oppose, or amend. Then pick any reasons or personal context you want included. Modern Action uses that input and the bill context to draft a message you can edit and send.
Congressional offices prioritize messages from their own constituents. Modern Action uses your address to route the drafted message to your senators when that is the most relevant target for this bill.
The draft includes the bill number, your position, the reasons you selected, any personal context you added, and a direct ask such as voting yes, voting no, cosponsoring, opposing, or seeking changes. You stay in control because you can edit the message before sending.
This page gives you an opportunity to support, oppose, or ask for changes to Cold Weather Diesel Reliability Act of 2025, then contact the elected officials who can act. Modern Action drafts the message from your position and the reasons you select.
Modern Action keeps the action tied to the bill itself: what it does, where it is in the process (committee), which office can still act, and what ask belongs in the message.
You are not starting from a blank form. Modern Action drafts the message around S3135, your stance, and the reasons you choose, then lets you edit and send when ready.
