# Service bulletin MAS004374 MCL 24\-46

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.

- Type: Service bulletin
- NHTSA id: 11008936
- Published by NHTSA: 2024\-10\-15
- Manufacturer's number: MAS004374 MCL 24\-46
- Manufacturer's date: 2024\-10\-07
- NHTSA component: UNKNOWN OR OTHER; ENGINE

## NHTSA's summary

To meet technical requirements, Maserati has introduced an L4 MHEV injector lower O\-ring replacement kit \(PN 900100021\) to ensure the highest quality during this operation. This tool allows for the first\-time replacement of individual lower injector O\-rings on L4 MHEV engines. Now, instead of replacing the entire rail, you can simply replace the O\-rings using Kit 673012512

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2024/MC-11008936-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2024/MC-11008936-9999.pdf)

The document is the manufacturer's. This site does not hold it.

## Components

Engine

## Vehicles listed

- 2023 to 2024 MASERATI GRECALE

## Other bulletins for the same vehicles and component

- [MAS005111\_A MTB 26\-06](/bulletins/11032896.md), 2026-05-22, Other: UNKNOWN OR OTHER; ENGINE. 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.
- [MAS005111 MTB 26\-05](/bulletins/11031741.md), 2026-04-30, Other: UNKNOWN OR OTHER; ENGINE. Maserati Coolant fluid Color Change from pink to purple.
- [MAS004952 DS 25\-36](/bulletins/11025844.md), 2025-12-01, Other: UNKNOWN OR OTHER; ENGINE. This Diagnostic Sheet serves as a guide and provides additional diagnostic info for possible issues potentially affecting the oil pump/sensor.
- [MAS004939 MTB 25\-43](/bulletins/11025839.md), 2025-12-01, Other: ENGINE; UNKNOWN OR OTHER. This bulletin provides instructions for checking engine radiator leaks. The purpose of this procedure is to confirm leaks with clear evidence, prevent unnecessary component replacement, and ensure accurate diagnosis.
- [MAS004829 MTB 25\-37](/bulletins/11024675.md), 2025-10-31, Other: UNKNOWN OR OTHER; ENGINE. This bulletin explains how to identify and handle momentary coolant leaks from the water pump’s weeper chamber on Maserati MHEV engines. It helps technicians understand what is normal during initial operation, what needs attention, and how to decide if the pump should be replaced.
- [MAS004864 MTB 25\-33](/bulletins/11023566.md), 2025-10-02, Other: UNKNOWN OR OTHER; ENGINE. This bulletin introduces the serviceability of the oil pump bearing on the V6 Nettuno engine. The bearing can now be replaced individually, eliminating the need for complete engine or long block replacement when noise is traced to this component. Models Involved: • Grecale V6 \(All MY\) • GranTurismo V6 / GranCabrio V6 \(All MY\) • MC20 / MC20 Cielo / MC20 Pura \(All MY\)
- [MAS004831 MTB 25\-32](/bulletins/11023122.md), 2025-09-15, Other: ENGINE; UNKNOWN OR OTHER. A new software update is now available for the AGSM \(Automatic Gear Shift Module\) on Grecale, GranTurismo, and GranCabrio vehicles. This update enhances PRND \(Park, Reverse, Neutral, Drive\) button responsiveness and simplifies their operation, improving the customer experience. The update is intended to: • Address customer concerns related to button responsiveness • Reduce AGSM module replacements to only cases with confirmed internal faults or complete non\-functionality • Limit Blue On Line \(BOL\) reports to only critical cases
- [MAS004789 DS 25\-19](/bulletins/11020794.md), 2025-07-18, Other: ENGINE; UNKNOWN OR OTHER. This diagnostic sheet is intended to assist technicians in identifying and differentiating engine oil leaks and sweating.
- [MAS004438\_A MTB 25\-16](/bulletins/11019549.md), 2025-06-17, Service bulletin: ENGINE; UNKNOWN OR OTHER. This Technical bulletin serves as a diagnostic guide for managing oil leaks and instructing related repairs. This Bulletin requires a BOL to be opened as “Support Request”
- [MAS004729 MTB 25\-18](/bulletins/11018743.md), 2025-06-02, Other: UNKNOWN OR OTHER; ENGINE. his Technical bulletin serves as a guide and provides additional info in case of “Max oil level exceeded” message displayed in the cluster \(IPC\).

JSON: [/v1/bulletins/11008936](/v1/bulletins/11008936)

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