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Service campaign MAS004653 RU 25-05

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 campaign
NHTSA id11016120
Published by NHTSA2025-04-01
Manufacturer's numberMAS004653 RU 25-05
Manufacturer's date2025-03-29
Campaign id or software versionRapid Update 770
NHTSA componentUNKNOWN OR OTHER

NHTSA's summary

This Rapid Update communication provides a general update to the MAS004444 RU #770 technical procedure. We are now requesting that the Valve B check be repeated **five times** instead of once. Additionally, an improvement has been implemented on the MD-EVO to make the test cycle easier to perform.

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.

Vehicles listed
MASERATI GRANTURISMO2025
MASERATI GRECALE2025

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