Mercedes-Benz warranty extension EW - Pressure Trans M157
What it saysIn our continuing efforts to ensure the proper performance of Mercedes-Benz products and to enhance the satisfaction of our customers, Mercedes-Benz USA, LLC is extending the warranty coverage on the pressure… NHTSA’s full summary ↓
Mercedes-Benz filed this with NHTSA as a warranty extension dated Mar 13, 2026, received Mar 30, 2026, about the service brakes. It names 22 model years (2016–2020). 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 communicationPicked out of NHTSA’s summary below, word for word. The document itself is the record, and the dealer checks the VIN.
In our continuing efforts to ensure the proper performance of Mercedes-Benz products and to enhance the satisfaction of our customers, Mercedes-Benz USA, LLC is extending the warranty coverage on the pressure transducer, vacuum pump, and vacuum lines in certain Model Year (MY) vehicles listed below from the original New Vehicle Limited Warranty of 4 years/50,000 miles to 15 years/150,000 miles, whichever occurs first. This extended warranty applies to the condition described below that may necessitate the repair or replacement of components related to the pressure transducer, vacuum pump, and vacuum lines. If the vacuum pump leaks, the oil could contaminate the pressure transducer and cause it to malfunction. This would result in inconsistent turbocharger pressure and cause a check engine malfunction indicator lamp (‘MIL’) to be illuminated and the vehicle could switch to limp-home mode.
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 |
|---|---|---|---|---|
| EW - Pressure Trans M157 | Warranty extension | Mar 13, 2026 | 11030304 | PDF, 204 KB |
What the document itself lists
The manufacturer titles it “Emission Extended Warranty – Pressure Transducer,”.
Parts the bulletin names
| Part number | Description | Qty |
|---|---|---|
| A0001531900 | — | — |
| A2762300265 | News Channel Update | Warranty | — |
| A2762300365 | News Channel Update | Warranty | — |
Read by machine from the document NHTSA serves (3 pages), read Sep 30, 2026. A part number is shown only where it matches Mercedes-Benz’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 22 model years this bulletin names have filed 664 complaints with NHTSA since 2015. 101 of them name Engine, Service Brakes — 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.
Multiple engine ignition coils have failed on this low mileage vehicle. History of failures are as followed. 1/18/2022 Mileage 39,246 Ignition Coil #4 6/16/2022 Mileage 40,915 Ignition Coil #2 3/16/2023 Mileage 43,866 Ignition Coil #6 and #2 4/23/2023 Mileage 44,275 Ignition Coil #1 1/15/2025 Mileage 51,560 Ignition Coil #4 Mercedes Benz…
2016 Mercedes-Benz GLE-Class · Engine · filed with NHTSA Jan 18, 2025 · ODI 11636782
My 2017 G550 misfired on a highway and I had total failure with kids in the backseat creating an immediate life-safety hazard. This issue was caused by the M176 engine, which is known to create misfires. Mercedes tried to blame it on me not changing my spark plus, but I showed proof they were changed with a certified Mercedes mechanic.
2017 Mercedes-Benz G-Class · Engine · filed with NHTSA Oct 27, 2026 · ODI 11773912
2007 mercedes benz sl500. Consumer writes in regard to brake failure. The consumer stated while approaching a stop sign the brakes failed to engage. The vehicle rolled through the stop sign. The vehicle experienced a catastrophic failure of the sensotronic braking control. The vehicle fault codes were 5611, C26DE, C26BB, and C25D5.
2017 Mercedes-Benz SL-Class · Service Brakes · filed with NHTSA Aug 3, 2022 · ODI 11477377
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 service brakes
Source: same model, same component group7 other manufacturer communications filed against these Mercedes-Benz models under the same component group (service brakes), newest first.
| Number | Kind | Dated | NHTSA’s summary |
|---|---|---|---|
| LI42.10-P-078779 | Service bulletin | Sep 22, 2026 | Complaint Repeat workshop visit for vehicle vibration while braking from 60MPH. NOTE: Although the symptom is similar to a tire or wheel vib… |
| LI42.10-P-080253 | Service bulletin | Sep 1, 2026 | Complaint When coming to a stop or at slow speeds, brakes produce light squealing noise. Cause Optimized brake pads may produce some noise a… |
| LI42.10-P-063502 | Service bulletin | Sep 1, 2026 | Complaint Noises/ squealing from the service brake in various driving situations and ambient conditions. Cause Frictional vibrations Remedy… |
| PSL-NCU Return Parts 5/29 | Other | May 30, 2026 | Dear Mercedes-Benz USA Dealers, The part numbers listed in the chart below should no longer be installed, and any existing stock must be ret… |
| LI42.10-P-079904 | Service bulletin | Oct 20, 2025 | Complaint At low speeds and light brake pressure, brakes will make a groaning or honking noise. Cause Frictional vibrations with very light… |
| LI42.10-P-076753 | Service bulletin | Jul 28, 2023 | Complaint Brake squeal Cause Frictional vibrations. There is no effect to braking capability. Remedy >> Refer to LI42.10-P-063502.… |
| NCU-2023040017 | Service bulletin | May 19, 2023 | Mercedes-Benz AG (“MBAG”), the manufacturer of Mercedes-Benz vehicles, has determined that on certain MY 2022-2023 C-Class, EQS and S-Class… |
Quote the number at the service desk. It is what the dealer’s system is keyed on.
Every manufacturer communication NHTSA holds for Mercedes-Benz, by the number printed on the letter.
Common questions
Source: NHTSA, 49 CFR 579.5Is Mercedes-Benz EW - Pressure Trans M157 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 EW - Pressure Trans M157 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 EW - Pressure Trans M157 cover?
The manufacturer filed it against 22 model years: 2018 Mercedes-Benz CLS-Class, 2017 Mercedes-Benz CLS-Class, 2016 Mercedes-Benz CLS-Class, 2016 Mercedes-Benz E-Class, 2018 Mercedes-Benz G-Class, 2017 Mercedes-Benz G-Class and more. Whether one particular vehicle is affected is a matter of its VIN and its build, not its model year alone.