TECHNICAL SERVICE OPERATIONS

MAS004774 RU 25-17
RAPID UPDATE
FROM: Maserati TSO
TO: Maserati Network

Rapid Update 792
M18x - AGSM Software Update

DATE: June 24, 2025
Certain Maserati vehicles are involved in a Rapid Update to update the AGSM (Automatic
Gearbox Shifter Module) software.
Models affected:
Grecale (M182) - MY23 MY24 MY25
GranTurismo (M189) GranCabrio (M190) - MY24 MY25
The software update is intended to optimize the sensitivity of the PRND controls, preventing
potential issues where the desired gear may not engage without repeated button presses. The
updated software ensures a more precise and immediate response from the gear selection
system.
We remind you that all the Rapid Updates must be performed within the first workshop visit,
regardless of the Mandatory setting set in Modis, as required by Maserati policies.
Also, for vehicles in Stock Dealer / PDI, it is necessary to carry out all action operations before
delivery to the end customer, as required by the White Book and explicitly reported in the Predelivery checklist.

Please read and review this bulletin first before ordering parts and/or starting the procedure.
Contact your Regional AfterSales Manager (RAM) or the Technical Support Helpdesk if you
have any questions.
Thank you for your continued support and cooperation.
Maserati North America
Aftersales Dept.
© 2025 Maserati North America
Aftersales
www.maseratiusa.com

MAS004774

All rights reserved. Reproduction or translation in
whole or in part is not permitted without
authorization from the publisher. Printed in USA

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All images shown in this bulletin are for illustrative purposes only
1. Always check ModisCS+ to see if the vehicle is involved in this action and if it has not been
previously performed.
2. Before proceeding, please ensure that the Engine is OFF.
3. Connect a battery maintainer to the 12V battery (It is recommended to always use the
E-XTEQ MAXIMUS to maintain minimum voltage and current draw requirements.
4. Connect the EVO to the vehicle, ensure that battery voltage is around 12.5V, then select
AGSM – ECU Programming, and follow the prompts.
Software version to be installed (or newer).
F188
670358268

5. After the ECU programming, perform BCM – Procedures – PROXI Alignment.
6. After the PROXI alignment, only for BEV vehicles, please follow the following procedures:
▪

Close the MDEVO application and disconnect the MDVCI2

▪

Disconnect the 12V Battery Maintainer from the 12V Battery

▪

Perform the Key OFF

▪

Make sure that the bonnet, the trunk, and all the doors are properly closed.

▪

Wait for the power latch (wait until the dashboard clock turns off)
NOTE: Allow the vehicle to sleep for ten minutes

▪

Reconnect the 12V Battery Maintainer to the 12V Battery

▪

Perform the Key ON

▪

Reconnect the MDVCI2, restart the MDEVO application, and clear DTCs from the ECU View.

▪

Perform the Ignition Cycle (Key OFF and Key ON)

▪

Verify that the vehicle goes into ready mode

7. Procedure complete.

Warranty Information
Fill in the relevant Warranty Claims as follows:

Description

Code

Rapid Update Number

792

Warranty Code

23

Fault Code

063

Component Code
Operation Code

© 2025 Maserati North America
Aftersales
www.maseratiusa.com

MAS004774

3.02.037
3.02.037.A (0,20h)

All rights reserved. Reproduction or translation in
whole or in part is not permitted without
authorization from the publisher. Printed in USA

Page 2 of 2

TECHNICAL SERVICE OPERATIONS

Technical Procedure