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Service bulletin MAS003478

A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.

The communication, as NHTSA indexes it (as of 2026-10-19)
TypeService bulletin
NHTSA id10233031
Published by NHTSA2023-03-20
Manufacturer's numberMAS003478
Manufacturer's date2023-02-21
NHTSA componentELECTRICAL SYSTEM; WHEELS

NHTSA's summary

Rapid Update 597 e related to the potential of five cable nuts losing torque. A wrong tightening torque has been applied in production with potential electrical issues on the vehicle and Hybrid system malfunction or in some case the complete discharge of the 12V battery. The remedy will require the inspection of four nuts located in the trunk and engine compartments, restoring the correct tightening torque.

The document

The document is the manufacturer's. This site does not hold it. NHTSA files a document at one of these two addresses; we have not asked NHTSA which.

Components

Electrical system, Wheels

Vehicles listed
MASERATI GRECALE2023

Listing a model year does not mean every vehicle of it is concerned: the document says which.

Other bulletins for the same vehicles and component
MAS005125 DS 26-072026-04-30. Other. This Diagnostic Sheet provides updated diagnostic and repair guidance for a potential wheel hub clicking noise condition on M182 Grecale ICE vehicles (all model years). The procedures outlined are intended to assist technicians in accurately identifying and correcting axle shaft and wheel hub related noise concerns that may be present during low‑speed operation, reversing, or initial vehicle launch.
MAS005125 DS 26-072026-04-30. Other. This Diagnostic Sheet provides updated diagnostic and repair guidance for a potential wheel hub clicking noise condition on M182 Grecale ICE vehicles (all model years). The procedures outlined are intended to assist technicians in accurately identifying and correcting axle shaft and wheel hub related noise concerns that may be present during low‑speed operation, reversing, or initial vehicle launch.
MAS005125 DS 26-072026-04-17. Other. This Diagnostic Sheet provides updated diagnostic and repair guidance for a potential wheel hub clicking noise condition on M182 Grecale ICE vehicles (all model years). The procedures outlined are intended to assist technicians in accurately identifying and correcting axle shaft and wheel hub related noise concerns that may be present during low‑speed operation, reversing, or initial vehicle launch. Not applicable to BEV versions.
MAS005057 DS 26-022026-03-18. Other. Grecale GranTurismo and GranCabrio 12 Volt Battery Best Practices. This Technical bulletin serves as a guide and provides additional diagnostic info on the 12V Battery as well as new updated warranty policies and exceptions.
MAS005052 DS 26-012026-03-18. Other. This bulletin provides a targeted inspection for a front engine-bay wiring harness section on Grecale (M182) vehicles when certain electrical symptoms are present. It describes how to access the area beneath the FDU and identify the specific harness segment that requires attention. If issues are found, it outlines the approved wiring repair and proper harness repositioning to help prevent future concerns.
MAS005001_A RU 26-042026-02-17. Service campaign. Certain Maserati vehicles listed in MODISCS+ are involved in a Rapid Update to install the latest software on multiple ECU modules. VEHICLES INVOLVED: (M182) Grecale MY23, MY24 and MY25
MAS004933 RU 25-312025-10-31. Service campaign. Certain Maserati listed in MODISCS+ are involved in a Rapid Update concerning the Premium Alarm System (LSA) reactivation and the Intrusion Transceiver Module (ITM) software update.
MAS004902 DS 25-322025-10-31. Other. This bulletin provides updated diagnostic procedures for identifying and resolving issues related to the parking sensor system on select Maserati models. It outlines steps to verify sensor condition, identify false alerts, and determine when replacement or further support is necessary.
MAS004769_A DS 25-292025-08-18. Other. This Technical bulletin serves as a guide and provides additional diagnostic info on the 12V Battery as well as new updated warranty policies and exceptions. MODELS AFFECTED: Grecale M182 (All MY), GranTurismo/GranCabrio M189 (All MY) (internal combustion engine and Folgore BEV vehicles) SECTION: 08.20-1 Energy generation and accumulation
MAS004786 DS 25-202025-07-18. Other. This Diagnostic Sheet serves as a guide and provides additional diagnostic info for possible axle shaft noise