Ram warranty extension 37D
What it saysNOx Sensor - Dealer Notification NHTSA’s full summary ↓
Ram filed this with NHTSA as a warranty extension dated Jun 26, 2026, received Jul 2, 2026, about the engine — 1 document under this number: 37D Combo. It names 6 model years (2025–2026). A warranty extension is not a safety recall — there is no NHTSA campaign number and no federal requirement — but it is usually work the manufacturer pays for on the vehicles it names; the dealer checks the VIN against the manufacturer’s list.
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What the bulletin says
Source: NHTSA's summary of the manufacturer's communicationEmissions Recall 37D - NOx Sensor - Dealer Notification
One of the 432 warranty extensions and special-coverage programs on file — every make, with the term each runs to.
Document filed under this number
| Document | Kind | Dated | NHTSA id | At NHTSA |
|---|---|---|---|---|
| 37D Combo | Warranty extension | Jun 26, 2026 | 11034384 |
What the document itself lists
Part the bulletin names
| Part number | Description | Qty |
|---|---|---|
| 04275086AE | Authorized Modification Label | — |
Read by machine from the document NHTSA serves (6 pages), read Sep 30, 2026. A part number is shown only where it matches Ram’s own catalogue shape, an operation only with its code and time, and a description only where the reader got it whole; anything it could not settle is left out, and the PDF is the record. Times are the manufacturer’s warranty allowances, not a quote.
The summary is NHTSA’s abstract of the document, as filed under 49 CFR 579.5. One communication is usually filed as several documents — the bulletin, a dealer notice, an owner letter — and the number on any of them finds this page. A PDF link is shown only once NHTSA’s own server has been seen to serve that document; the rest are checked over the following nights. Quote the number at a service desk; it is what the dealer’s system is keyed on.
Model years it names
Source: as the manufacturer filed themAlso filed against model years this site has no page for: 2025 Ram 4500; 2026 Ram 4500; 2025 Ram 5500; 2026 Ram 5500.
A vehicle page’s bulletin list shows the newest few communications filed against that model year; the count there is every one.
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A weekly email, sent only in a week when Ram files something new with NHTSA for the model you pick — service bulletins, campaigns, warranty extensions, over-the-air notices, every model year. Nothing else is sent; one-click unsubscribe in every message. Separate from recall alerts.
What owners reported
Source: NHTSA complaint databaseOwners of the 2 model years this bulletin names have filed 71 complaints with NHTSA since 2015. 47 of them name Electrical System — the same broad component group this bulletin is filed under. NHTSA groups complaints coarsely, so that means the same area of the vehicle, not necessarily the same fault.
Purchased the truck new with 25 miles on it from the dealer. Within the first 2000 miles, I had a message pop up that said "Service Exhaust System See Dealer". I took it in to the dealer, they said it showed a random emission related code had popped up but was not currently active, so their recommendation was to clear it and see if it…
2026 Ram 3500 · Engine · filed with NHTSA Dec 23, 2025 · ODI 11706824
The contact owns a 2025 Ram 3500. The contact stated that while driving approximately 60 MPH, several unknown warning lights illuminated, and the vehicle stalled. The vehicle was towed to a dealer where it was diagnosed, and determined that several repairs were needed, and there was an issue with the battery.
2025 Ram 3500 · Engine · filed with NHTSA Mar 16, 2026 · ODI 11724654
The contact owns a 2025 Ram 3500. The contact received notification of NHTSA Campaign Number: 25V826000 (ELECTRICAL SYSTEM); and the vehicle was taken to the dealer, where the instrument panel software update was completed; however, the instrument panel became inoperable after the update was completed.
2025 Ram 3500 · Electrical System · filed with NHTSA Apr 28, 2026 · ODI 11734265
A complaint is one owner’s account, not a defect finding, and a bulletin is not a recall. Nothing here says this bulletin was issued because of these complaints, or that the repair it describes fixed them. Complaint files on this site begin in 2015.
More bulletins about the engine
Source: same model, same component group56 other manufacturer communications filed against these Ram models under the same component group (engine), newest first. The eight newest are listed; the rest are on the Ram list.
| Number | Kind | Dated | NHTSA’s summary |
|---|---|---|---|
| 07-006-26 | Service bulletin | Sep 1, 2026 | Engine Overheat Customers may comment on the following: SYMPTOM: ● Vehicle overheating. ● Temperature gauge is reading hot. ● Overheat symbo… |
| 114255 | Service bulletin | Aug 26, 2026 | RADIATOR - ENGINE COOLING |
| 114254 | Service bulletin | Aug 26, 2026 | RADIATOR - ENGINE COOLING |
| 9100882 | Service bulletin | Aug 17, 2026 | PULLEY Fan If replacing 68209745AA, also replace 68723388AA, 05086958AB, and 68000833AD. Retain bolts, mark each with its original location… |
| 18-038-26 REV. A | Service bulletin | Jul 29, 2026 | Flash: Powertrain Control Module (PCM) Updates Customers must experience a Malfunction Indicator Lamp (MIL) illumination and the vehicle exh… |
| 113754 | Service bulletin | Jul 29, 2026 | SENSOR - EXHAUST TEMPERATURE |
| 113293 | Service bulletin | Jul 8, 2026 | INJECTOR - FUEL |
| 113292 | Service bulletin | Jul 8, 2026 | INJECTOR - FUEL |
Quote the number at the service desk. It is what the dealer’s system is keyed on.
Every manufacturer communication NHTSA holds for Ram, by the number printed on the letter.
Common questions
Source: NHTSA, 49 CFR 579.5Is Ram 37D a recall?
No. A warranty extension is a manufacturer communication filed with NHTSA under 49 CFR 579.5; a safety recall carries an NHTSA campaign number (two digits, a letter, six digits) and a federal duty to repair for free. Check the vehicle’s recalls by VIN at nhtsa.gov/recalls, or on its page here.
Is the 37D repair free?
A warranty extension is usually paid by the manufacturer on the vehicles it names, within the terms and time limit the document sets; the dealer checks the VIN against the manufacturer’s list.
Which vehicles does 37D cover?
The manufacturer filed it against 6 model years: 2026 Ram 3500, 2025 Ram 3500, 2025 Ram 4500, 2026 Ram 4500, 2025 Ram 5500, 2026 Ram 5500. Whether one particular vehicle is affected is a matter of its VIN and its build, not its model year alone.