Quattroporte GT

74 service bulletins filed with NHTSA for this model year

• May 6, 2026UNKNOWN OR OTHERMAS005111_A MTB 26-06

  Maserati Coolant Fluid Color Change. The previous pink coolant and the new purple coolant are fully compatible and may be mixed without affecting coolant quality, performance, or system behavior.

• Apr 21, 2026ENGINEMAS005111 MTB 26-05

  Maserati Coolant fluid Color Change from pink to purple.

• Apr 16, 2026WHEELSMAS005125 DS 26-07

  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.

• Apr 15, 2026FUEL/PROPULSION SYSTEMMAS004816_A MTB 26-04

  This bulletin outlines the refinishing procedure for restoring the black coating on exhaust tips affected by peeling or flaking paint. This validated process is intended to avoid unnecessary replacement of the entire exhaust silencer assembly

• Apr 9, 2026UNKNOWN OR OTHERMAS005101 DS 26-06

  This bulletin provides instructions for diagnosing and correcting issues with the rear exhaust silencer. These issues may include exhaust noise or bypass valve problems (including DTC P1217 and P2D1100).

• Mar 31, 2026UNKNOWN OR OTHERMAS005068 DS 26-03

  R1 Radio Restore Procedure After Software Update, MODELS: MY21+ all models equipped with R1 Radio, up to software version U39.19.

• Feb 24, 2026UNKNOWN OR OTHERMAS005005 MCL 26-04

  A new software release “Jakarta 10.04.00” is now available for the MD and MDEVO/MDEVO2/MDEVO3. This update brings: • A new user interface for the software update application. • A cybersecurity layer that protects communication with diagnostic and update servers. Once installed, the cybersecurity layer runs in the background. The main change users will notice is how the software update client looks and behaves. To get the new update app, your diagnostic tools must complete installation of Jaka

• Feb 9, 2026UNKNOWN OR OTHERMAS005035 MTB 26-01

  Maserati has created eight new special tools. These tools are mandatory and will be listed in the ModisCS+ Special Tools Catalog. Please also note that this catalog lists all the special tools already in use that are compatible and required for vehicle maintenance. Therefore, it is important to check this section to ensure the tools are available in your workshop.

• and 66 more

Source: NHTSA manufacturer communications (technical service bulletins).