Maserati bulletin MAS004745 MTB 25-21
What it saysSome vehicles may experience oil leakage from a threaded insert that may be causing a leak in the engine oil pan. NHTSA’s full summary ↓
Maserati filed this with NHTSA as a manufacturer communication dated Jun 12, 2025, received Jun 17, 2025, about the engine. It names 27 model years (2016–2024). A manufacturer communication 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 communicationSome vehicles may experience oil leakage from a threaded insert that may be causing a leak in the engine oil pan. This bulletin provides the repair steps to replace the insert and avoid replacing the entire oil pan. MODELS AFFECTED: - Quattroporte (M156) - Ghibli (M157) - Levante (M161) *All with V6 engines only*
Document filed under this number
| Document | Kind | Dated | NHTSA id | At NHTSA |
|---|---|---|---|---|
| MAS004745 MTB 25-21 | Other | Jun 12, 2025 | 11019555 | PDF, 297 KB |
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: 2016 Maserati Levante.
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 26 model years this bulletin names have filed 75 complaints with NHTSA since 2015. 22 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.
While driving around 45mph I began to smell a burning scent. This intensified and smoke began to enter the cabin of the car. I pulled over and called 911. After opening the hood the fire department extinguished a small fire in the engine compartment just forward of the driver steering wheel area
2020 Maserati Ghibli · Engine · filed with NHTSA Jan 11, 2023 · ODI 11501234
Stopped at stop sign and slowly tried to accelerate. The car moved forward into oncoming traffic and almost stalled. To compensate I had to press accelerator hard and then engine finally woke back up. This has happened another time where the car stalled and shifted into neutral.
2017 Maserati Ghibli · Engine · filed with NHTSA Jun 24, 2021 · ODI 11422096
While driving at low speeds, under 5mph, the car will shift itself into neutral. This happens while slowing, coasting, or slow accelerations. This has caused an immediate safety issue as you lose control of the car, especially when the shift into neutral is a hard shift.
2017 Maserati Levante · Engine · filed with NHTSA Feb 2, 2024 · ODI 11569584
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 group9 other manufacturer communications filed against these Maserati models under the same component group (engine), newest first. The eight newest are listed; the rest are on the Maserati list.
| Number | Kind | Dated | NHTSA’s summary |
|---|---|---|---|
| MAS005184 MTB 26-10 | Other | Jul 9, 2026 | Quattroporte / Ghibli / Levante V6 – Thermostat Gasket Availability This bulletin provides updated information and further clarification reg… |
| MAS005111_A MTB 26-06 | Other | May 6, 2026 | Maserati Coolant Fluid Color Change. The previous pink coolant and the new purple coolant are fully compatible and may be mixed without affe… |
| MAS005111 MTB 26-05 | Other | Apr 21, 2026 | Maserati Coolant fluid Color Change from pink to purple. |
| MAS004789 DS 25-19 | Other | Jul 11, 2025 | This diagnostic sheet is intended to assist technicians in identifying and differentiating engine oil leaks and sweating. |
| MAS004438_A MTB 25-16 | Other | Jun 1, 2025 | his Technical bulletin serves as a diagnostic guide for managing oil leaks and instructing related repairs. This Bulletin requires a BOL to… |
| MAS004703 MTB 25-15 | Other | May 16, 2025 | This Technical bulletin serves as a guide and provides additional diagnostic info to update the engine oil level displayed on the ICS… |
| MAS004438 MTB 25-03 | Other | Jan 28, 2025 | This Technical information bulletin serves as a diagnostic guide for managing engine oil leaks and instructing related repairs. |
| MAS004490 MTB 24-30 | Other | Dec 12, 2024 | his Technical bulletin serves as a guideline and outlines requirements when considering a possible engine replacement on Maserati vehicles.… |
Quote the number at the service desk. It is what the dealer’s system is keyed on.
Every manufacturer communication NHTSA holds for Maserati, by the number printed on the letter.
Common questions
Source: NHTSA, 49 CFR 579.5Is Maserati MAS004745 MTB 25-21 a recall?
No. A manufacturer communication 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 MAS004745 MTB 25-21 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 MAS004745 MTB 25-21 cover?
The manufacturer filed it against 27 model years: 2024 Maserati Ghibli, 2023 Maserati Ghibli, 2022 Maserati Ghibli, 2021 Maserati Ghibli, 2020 Maserati Ghibli, 2019 Maserati Ghibli and more. Whether one particular vehicle is affected is a matter of its VIN and its build, not its model year alone.