Maserati bulletin MAS004931 MTB 25-38
What it saysThis bulletin provides guidance to the authorized service network regarding a specific repair procedure applicable to the front axle transfer case. NHTSA’s full summary ↓
Maserati filed this with NHTSA as a manufacturer communication dated Oct 30, 2025, received Oct 31, 2025, about the suspension. It names 20 model years (2016–2025). 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 communicationThis bulletin provides guidance to the authorized service network regarding a specific repair procedure applicable to the front axle transfer case. The intervention is intended to address a knocking noise that may occur during lowspeed directional changes (Drive to Reverse and vice versa). The procedure outlined below aims to eliminate the noise by reconditioning the flange-to-shaft interface and ensuring correct component alignment and lubrication.
Document filed under this number
| Document | Kind | Dated | NHTSA id | At NHTSA |
|---|---|---|---|---|
| MAS004931 MTB 25-38 | Other | Oct 30, 2025 | 11024685 | PDF, 603 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: 2020 Maserati Granturismo; 2021 Maserati Granturismo; 2022 Maserati Granturismo; 2023 Maserati Granturismo; 2022 Maserati Grecale; 2024 Maserati Nuova Grancabrio; 2025 Maserati Nuova Grancabrio; 2024 Maserati Nuova Granturismo; 2025 Maserati Nuova Granturismo.
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 11 model years this bulletin names have filed 16 complaints with NHTSA since 2015. 1 of them name Suspension — 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.
The contact owns a 2024 Maserati GranTurismo. The contact stated that while driving at an undisclosed speed, the vehicle unexpectedly and aggressively pulled to the right while the contact was in the middle lane. There were no warning lights illuminated.
2024 Maserati GranTurismo · Suspension · filed with NHTSA Feb 24, 2026 · ODI 11720130
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 suspension
Source: same model, same component group23 other manufacturer communications filed against these Maserati models under the same component group (suspension), newest first. The eight newest are listed; the rest are on the Maserati list.
| Number | Kind | Dated | NHTSA’s summary |
|---|---|---|---|
| MAS004990 MTB 25-46 | Other | Dec 24, 2025 | This bulletin provides updated information regarding the serviceability of the transfer case flange kit for Grecale, GranTurismo, and GranC… |
| MAS004974 DS 25-37 | Other | Dec 5, 2025 | Rear Differential Oil Leakage This Diagnostic Sheet serves as a guide and provides additional diagnostic info related to rear differential… |
| MAS004886 DS 25-31 | Other | Oct 7, 2025 | This Diagnostic Sheet provides step-by-step instructions to help diagnose and report issues with the adaptive suspension system on Maserati… |
| MAS004834 DS 25-27 | Other | Aug 5, 2025 | This document outlines the correct diagnostic and evaluation procedure when oil traces or leakage are observed on front or rear shock absor… |
| MAS004690 DS 25-12 | Other | Apr 15, 2025 | This Technical bulletin serves as a guide and provides additional diagnostic info for possible Air suspension issues on Grecale equipped wi… |
| RAPID UPDATE 760 | Service campaign | Apr 8, 2025 | Rapid Update 760 TEMPORARY SUSPENSION Effective Immediately: Rapid Update 760 is suspended until further notice due to the potential occurr… |
| MAS004673 DS 25-09 | Other | Apr 4, 2025 | GranTurismo, GranCabrio: Air Suspension System Diagnosis This Technical bulletin serves as a guide and provides additional diagnostic info f… |
| MAS004672 DS 25-08 | Other | Apr 4, 2025 | This Technical bulletin serves as a guide and provides additional diagnostic info for possible Air suspension issues on Grecale equipped wi… |
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 MAS004931 MTB 25-38 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 MAS004931 MTB 25-38 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 MAS004931 MTB 25-38 cover?
The manufacturer filed it against 20 model years: 2024 Maserati GranTurismo, 2019 Maserati GranTurismo, 2018 Maserati GranTurismo, 2017 Maserati GranTurismo, 2016 Maserati GranTurismo, 2025 Maserati Grancabrio and more. Whether one particular vehicle is affected is a matter of its VIN and its build, not its model year alone.