Ram bulletin 08-377-26
What it saysTire Pressure Monitoring System (TPMS) Red XX Displayed and/or Warning Indicator Illuminated Customers must experience a Malfunction Indicator Lamp (MIL) illumination and the vehicle must SYMPTOM: exhibit/set one… NHTSA’s full summary ↓
Ram filed this with NHTSA as a service bulletin dated Oct 17, 2026, received Oct 22, 2026, about the electrical system — 2 documents under this number: 08-377-26 REV. A and 1 more. It names 4 model years (2026). A service bulletin is not a safety recall: it is the manufacturer telling its dealers how to diagnose or repair a condition, and whether the work is paid for depends on the warranty in force. Quoting the number at a service desk can save a diagnosis.
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What the bulletin says
Source: NHTSA's summary of the manufacturer's communicationTire Pressure Monitoring System (TPMS) Red XX Displayed and/or Warning Indicator Illuminated Customers must experience a Malfunction Indicator Lamp (MIL) illumination and the vehicle must SYMPTOM: exhibit/set one or more of the following Diagnostic Trouble Codes (DTCs): ● C1501-31 - Tire Pressure Sensor 1-No Signal. ● C1502-31 - Tire Pressure Sensor 2-No Signal. ● C1503-31 - Tire Pressure Sensor 3-No Signal. ● C1504-31 - Tire Pressure Sensor 4-No Signal. ● C1505-31 - Tire Pressure Sensor 5-No Signal. ● C1506-31 - Tire Pressure Sensor 6-No Signal. Customers may also comment on the following: ● TPMS displaying red "XX" for one or more sensors and/or the tire pressure warning light is on in the Instrument Panel Cluster (IPC). This bulletin involves scanning the TPMS sensors and replacing TPM sensor(s) found in the provided table.
Documents filed under this number
| Document | Kind | Dated | NHTSA id | At NHTSA |
|---|---|---|---|---|
| 08-377-26 REV. A | Service bulletin | Oct 17, 2026 | 11038634 | |
| 08-377-26 | Service bulletin | Oct 15, 2026 | 11038633 |
What the document itself lists
Part the bulletin names
| Part number | Description | Qty | Find it |
|---|---|---|---|
| 68591551AB | Sensor, Tire Pressure Return sensors to the | — | eBay Motors → |
Labour operation and the time the manufacturer allows
| Operation | Description | Time |
|---|---|---|
| SG507214 | — | 0.9 hrs |
Read by machine from the document NHTSA serves (5 pages), read Oct 24, 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. Listings and prices on eBay Motors are the seller’s.
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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: 2026 Ram 4500; 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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What owners reported
Source: NHTSA complaint databaseOwners of the 2 model years this bulletin names have filed 57 complaints with NHTSA since 2015. 29 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.
Stellantis issued a STAR service order regarding the digital rearview mirror not operating. I bought my truck in April of 2026 and the mirror was inoperable. Ram dealers have had the truck in the shop for over 10 weeks and cannot fix this safety issue. A STAR number and two claims numbers have been assigned.
2026 Ram 2500 · Electrical System · filed with NHTSA Jul 28, 2026 · ODI 11753228
The contact owns a 2026 Ram 3500. The contact stated that while driving at an undisclosed speed, several unknown warning lights were illuminated. The message that the trailer was not connected was displayed.
2026 Ram 3500 · Electrical System · filed with NHTSA Aug 20, 2026 · ODI 11758321
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 electrical system
Source: same model, same component group245 other manufacturer communications filed against these Ram models under the same component group (electrical system), newest first. The eight newest are listed; the rest are on the Ram list.
| Number | Kind | Dated | NHTSA’s summary |
|---|---|---|---|
| S2608000039 | Service bulletin | Oct 16, 2026 | Trailer Reverse Steering Control Radio Soft Button Blinks Even Without a User-Initiated Calibration |
| 9100945 | Service bulletin | Oct 15, 2026 | FUSE BLOCK - PWR DISTRIBUTION A/C Blowing hot air or not working. A/C relay clutch not operating, dealers are unnecessary replacing PDCs. Ba… |
| 9100938 | Service bulletin | Oct 15, 2026 | FUSE BLOCK - PWR DISTRIBUTION |
| 08-375-26 | Service bulletin | Oct 14, 2026 | Tow Nav Menu Option Unavailable - UBQ/UBW Customers may comment on the following: SYMPTOM: ● Tow Nav menu option is grayed out and cannot be… |
| 9100928 | Service bulletin | Oct 5, 2026 | TPMS full assembly… |
| 9100926 | Service bulletin | Sep 30, 2026 | WIRELESS CHARGER Welcome GREEN LED not turning ON after multiple IGN ON/OFF without sleep cycle and no phone on the charging pads. Part numb… |
| 08-339-26 | Service bulletin | Sep 24, 2026 | Max Tow Right and Left Rear Wheel Speed Sensors Inoperable Customers must experience a Malfunction Indicator Lamp (MIL) illumination and the… |
| 08-331-26 | Service bulletin | Sep 11, 2026 | Flash: Vehicle System Interface Module (VSIM) Updates Customers may experience a Malfunction Indicator Lamp (MIL) illumination and the vehic… |
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 08-377-26 a recall?
No. A service bulletin 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 08-377-26 repair free?
Not automatically. A service bulletin describes how to diagnose or repair a condition; who pays depends on the warranty in force, any extension, and the dealer. Quoting the number can save a diagnosis either way. Every Stellantis warranty extension on file lists the ones Stellantis has filed.
Which vehicles does 08-377-26 cover?
The manufacturer filed it against 4 model years: 2026 Ram 2500, 2026 Ram 3500, 2026 Ram 4500, 2026 Ram 5500. Whether one particular vehicle is affected is a matter of its VIN and its build, not its model year alone.