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Manufacturer communication · Service bulletin

Ram bulletin S2308000101

What it saysThe replacement CSWM/HSM sets DTC?s U1446-00, B1EB4-1B, B1EB3-1B, B11DC-13 NHTSA’s full summary ↓

Ram filed this with NHTSA as a service bulletin dated Aug 17, 2023, received Oct 2, 2023, about the seats. It names 7 model years (2017–2023). 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 communication

The Replacement CSWM/HSM Sets DTC?s U1446-00, B1EB4-1B, B1EB3-1B, B11DC-13

Kind Service bulletin Manufacturer date Aug 17, 2023 Received by NHTSA Oct 2, 2023 Components Seats

Document filed under this number

DocumentKindDatedNHTSA idAt NHTSA
S2308000101Service bulletinAug 17, 202310243165not found

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.

Doing the repair yourself, or pricing it before the shop does? Search the part by fitment on eBay Motors — the listing and the price are the seller’s.

Find the seat heater/cooler for the 2023 1500 →

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Model years it names

Source: as the manufacturer filed them

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.

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What owners reported

Source: NHTSA complaint database

Owners of the 7 model years this bulletin names have filed 5,150 complaints with NHTSA since 2015.

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 seats

Source: same model, same component group

5 other manufacturer communications filed against the Ram 1500 under the same component group (seats), newest first.

NumberKindDatedNHTSA’s summary
S2623000025Service bulletinApr 17, 2026Front Seat Massage Function Inoperative.
110627Service bulletinMar 4, 2026PANEL - FRONT SEAT BACK
S2508000107Service bulletinDec 12, 2025Comfort Seat Module (CSM) or Comfort Steering Wheel Module (CSWM) do Not Operate
08-123-25Service bulletinJul 16, 2025NOTE: Does not apply to vehicles built for US Market. Lumbar Seat Inoperable Customers may experience the following: ● All lumbar seat con…
S2408000048Service bulletinMay 21, 2024Comfort Seat Module (CSM) or Comfort Steering Wheel Module (CSWM) do Not Operate After a Recent Module Replacement

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.

Photo: Christian Buehner / Unsplash

Common questions

Source: NHTSA, 49 CFR 579.5

Is Ram S2308000101 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 S2308000101 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.

Which vehicles does S2308000101 cover?

The manufacturer filed it against 7 model years: 2023 Ram 1500, 2022 Ram 1500, 2021 Ram 1500, 2020 Ram 1500, 2019 Ram 1500, 2018 Ram 1500 and more. Whether one particular vehicle is affected is a matter of its VIN and its build, not its model year alone.