Jeep service campaign 26B
What it saysCustomer Satisfaction Notification 26B Thermostat NHTSA’s full summary ↓
Jeep filed this with NHTSA as a service campaign dated Jun 1, 2024, received Jun 11, 2024, about the engine — 1 document under this number: 26B Combo. It names 4 model years (2022–2023). A service campaign 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 communicationCustomer Satisfaction Notification 26B Thermostat
Document filed under this number
| Document | Kind | Dated | NHTSA id | At NHTSA |
|---|---|---|---|---|
| 26B Combo | Service campaign | Jun 1, 2024 | 11001523 | PDF, 703 KB |
What the document itself lists
Parts the bulletin names
| Part number | Description | Qty |
|---|---|---|
| 68503555AB | O-Ring | — |
| 68361712AB | — | — |
| 68163849AB | Coolant 50/50 Mix-1 Gal | — |
| 04275086AE | CUSTOMER SATISFACTION NOTIFICATION | — |
Read by machine from the document NHTSA serves (10 pages), read Sep 30, 2026. A part number is shown only where it matches Jeep’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 themA 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 4 model years this bulletin names have filed 438 complaints with NHTSA since 2015. 137 of them name Engine — 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.
As I was pulling up to a red light, the vehicle threw itself into park and completely stopped and would not move. I was unable to put gear into drive. Thankfully, I was not going at full speed. After a couple minutes, I was able to put my foot on brake to restart the car. At this point, the engine and battery light were on as well.
2022 Jeep Wagoneer · Engine · filed with NHTSA Sep 16, 2022 · ODI 11484797
While traveling on San Marcos Highway between Luling and San Marcos at 65 MPH, the vehicle began to lose speed and I realized the engine was no longer powering the vehicle. No warning indicators other than an unresponsive throttle. I was able to coast off onto the shoulder and bring the vehicle to a stop.
2022 Jeep Grand Wagoneer · Engine · filed with NHTSA Jun 9, 2023 · ODI 11526311
The contact owns a 2023 Jeep Grand Wagoneer. The contact stated that while his wife was driving approximately 65 MPH on the highway, the vehicle lost motive power and shut off. The vehicle was later towed to the local dealer, who diagnosed that the thermostat had failed, causing the engine to overheat.
2023 Jeep Grand Wagoneer · Engine · filed with NHTSA Aug 6, 2025 · ODI 11678825
In depth: 2023 Jeep Wagoneer engine problems → · 2022 Jeep Wagoneer engine problems →
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 group59 other manufacturer communications filed against these Jeep models under the same component group (engine), newest first. The eight newest are listed; the rest are on the Jeep list.
| Number | Kind | Dated | NHTSA’s summary |
|---|---|---|---|
| 9100949 | Service bulletin | Oct 20, 2026 | oil filter If an engine oil leak develops from gasket of a newly installed MOPAR engine oil filter, please replace it with an equivalent BPr… |
| 18-083-26 | Service bulletin | Oct 10, 2026 | Flash: Powertrain Control Module (PCM) Updates Customers must experience a Malfunction Indicator Lamp (MIL) illumination and the vehicle mus… |
| 18-082-26 | Service bulletin | Oct 10, 2026 | Flash: Powertrain Control Module (PCM) Updates Customers must experience a Malfunction Indicator Lamp (MIL) illumination and the vehicle mus… |
| 18-074-26 | Service bulletin | Oct 10, 2026 | Flash: Powertrain Control Module (PCM) Updates Customers must experience a Malfunction Indicator Lamp (MIL) illumination and the vehicle mus… |
| 9100861 | Service bulletin | Aug 18, 2026 | PUMP, Auxiliary Coolant Before replacing the Auxiliary Coolant Pump, please perform the following steps: 1) Key ON/OFF and let the after-run… |
| 09-012-26 | Service bulletin | Jun 18, 2026 | Oil Pan Leak Customers may experience the following: SYMPTOM: ● 'Low Oil Level' message on in the Instrument Panel Cluster (IPC). ● Oil Leak… |
| 9100832 | Service bulletin | Jun 9, 2026 | Before replacing the starter, please follow the published diagnostics in the Service Information at 08 - Electrical / 8F - Engine Systems /… |
| 9100790 | Service bulletin | Mar 26, 2026 | Before replacing the water pump on 3.0L SO/HO, please follow the updated WATER PUMP INSPECTION diagnostic procedure to confirm the leak pers… |
Quote the number at the service desk. It is what the dealer’s system is keyed on.
Every manufacturer communication NHTSA holds for Jeep, by the number printed on the letter.
Common questions
Source: NHTSA, 49 CFR 579.5Is Jeep 26B a recall?
No. A service campaign 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 26B repair free?
A service campaign 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 26B cover?
The manufacturer filed it against 4 model years: 2023 Jeep Grand Wagoneer, 2022 Jeep Grand Wagoneer, 2023 Jeep Wagoneer, 2022 Jeep Wagoneer. Whether one particular vehicle is affected is a matter of its VIN and its build, not its model year alone.