Vehicle report
Technical service bulletins are instructions a manufacturer sent its dealers about a known fault. They are not recalls and the work is usually not free, but they are the clearest signal of a problem the manufacturer already knows about.
MAS004705_A MTB 26-13
Grecale Driveshaft Flex Disc Characteristics This Technical bulletin serves as a guide and provides info regarding wear characteristics of the driveshaft “Flex Disc” and to recognize which condition of this component is considered compliant and therefore avoid unnecessary replacements.
MAS005212 RU 26-12
Maserati GranTurismo – Oil Sensor Wiring Check Certain Maserati vehicles listed in MODISCS+ are involved in a Rapid Update involving inspection and, if necessary, correction of the proper routing of the oil sensor wiring harness located near the alternator.
MAS005111_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.
MAS005111 MTB 26-05
Maserati Coolant fluid Color Change from pink to purple.
MAS005125 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.
MAS005068 DS 26-03
R1 Radio Restore Procedure After Software Update, MODELS: MY21+ all models equipped with R1 Radio, up to software version U39.19.
MAS005057 DS 26-02
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.
MAS005005 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 Jakarta 10.04.00 or higher.
MAS005053 RU 26-05
Certain Maserati vehicles listed in MODISCS+ are involved in a Rapid Update campaign to update the OBCM (On-Board Charger Control Module). VEHICLES INVOLVED: • (M189) GranTurismo BEV – MY24, MY25 • (M190) GranCabrio BEV – MY24, MY25 • (M182) Grecale BEV – MY25, MY26 A new OBCM software update has been released to ensure proper charging system operation. This update replaces outdated software versions that may lead to potential charging-system concerns. 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.
MAS005035 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.
MAS004990 MTB 25-46
This bulletin provides updated information regarding the serviceability of the transfer case flange kit for Grecale, GranTurismo, and GranCabrio.
MAS004937 MCL 25-05
Management and Maintenance of New Maserati In-Stock Vehicles
MAS004995 MTB 25-47
This bulletin provides updated information regarding the serviceability of the in-tank fuel pumps for MC20, GranTurismo, and GranCabrio.
MAS004996 MCL 25-54
This bulletin provides guidance on proper storage practices for Maserati vehicles in dealer inventory to minimize deterioration of premium interior components (leather, wood and carbon fiber).
MAS004936 MTB 25-41
This bulletin provides updated guidance on the serviceability of the multifunction control buttons integrated into the steering wheel of certain Maserati vehicles. For repairs or replacements, the button assembly can now be serviced independently, without replacing the entire steering wheel. These buttons are available as individual sub-components, enabling targeted replacement.
MAS004872_A RU 25-32
This bulletin outlines Rapid Update 797 for Maserati GranCabrio vehicles. The update includes multiple service actions to improve the performance, synchronization, and perceived quality of the convertible soft top system. Each VIN listed in the annex requires specific tasks, which are automatically identified in Modis.
MAS004872 RU 25-29
This bulletin outlines Rapid Update 797 for Maserati GranCabrio vehicles. The update includes multiple service actions to improve the performance, synchronization, and perceived quality of the convertible soft top system. Each VIN listed in the annex requires specific tasks.
MAS004912 DS 25-33
This bulletin provides updated diagnostic and repair instructions for identifying and addressing corrosion-related concerns in the low-pressure fuel pump on all Maserati models equipped with internal combustion engines (ICE).
MAS004915 MTB 25-40
The purpose of this bulletin is to explain the behavior and function of the Load Shed system introduced in BCM Software 19.2 on Grecale, GranTurismo, and GranCabrio models. This system automatically reduces power to non-essential electrical features to protect battery health and ensure vehicle stability, especially during low battery charge or charging system issues.
MAS004918 MTB 25-39
The purpose of this communication is to provide a guideline concerning the execution of ECU software updates (ECUs) and to clarify how the EVO checks the availability of software updates for the ECUs installed in the vehicle.
MAS004931 MTB 25-38
This bulletin provides guidance to the authorized service network regarding a specific repair procedure applicable to the front axle transfer case. The intervention is intended to address a knocking noise that may occur during lowspeed directional changes (Drive to Reverse and vice versa). The procedure outlined below aims to eliminate the noise by reconditioning the flange-to-shaft interface and ensuring correct component alignment and lubrication.
MAS004914 MCL 25-51
The Rapid Update campaigns listed in the attachment will be closed according to the following schedule: Field Action LIST – 1° batch Campaign Number Campaign Description Closure Date 517 MCA TBM FOTA update 4.34 SQDF missing data 20/10/2025 529 MC20 MY22 coolant leakage from water pump (idler replacement) 20/10/2025 549 M161 V8 cavo motore L 20/10/2025 576 MC20 Door striker baseplate detachment 20/10/2025 585 MC20 MY22 Half Shafts Replacement 20/10/2025 Field Action LIST – 2° batch Campaign Number Campaign Description Closure Date 643 M240 sbiancamento guarnizione porta 12/12/2025 669 M189 Air Spring check 12/12/2025 684 M189 Leak from Air Spring - Extension 12/12/2025 689 M182 RFHM Repositioning 12/12/2025 705 M240 Tremec transmission leak 12/12/2025 712 M189 M190 MY24 - Air Suspension Full Customer Protection (ALLUMINUM SOL) 12/12/2025 715 M189 Multi-SW Updates Regrouping (BCM-CVPAMPLGM-BSM-ICS-IPC) 12/12/2025 720 M240 DCSD SW Update 12/12/2025 724 M240 ECM SW Update 12/12/2025 725 M189 M190 Multi-HW 12/12/2025 726 M182 Door to body 12/12/2025 727 GC Wrong TBM EMEA-NAFTA 12/12/2025 728 M189 BEV - Front HalfShaft screws loosening 12/12/202
MAS004849 MCL 25-47
Introduction to the new Maserati GranTurismo & GranCabrio This document includes in detail: • Vehicle maintenance and periodic battery checks. • Indications of best practices and technical notes for Service. • Pre-Delivery inspection checklist. • Activation of the technical team. • Unveiling tech-doc/diagnosis and special tools.
MAS004896 MTB 25-36
The purpose of this bulletin is to inform dealers about the possible logging of false Diagnostic Trouble Codes (DTCs) on the DSM and/or PSM ECUs in certain GranCabrio vehicles. These DTCs do not indicate any functional issue and do not affect system performance.
MAS004875 MCL 25-44
The purpose of this communication is to clarify the correct procedure for checking the navigation system map version during Pre-Delivery Inspection (PDI). This ensures that the installed maps correspond to the vehicle’s destination country. MODELS AFFECTED: All Maserati models equipped with the factory navigation system.
MAS004817 MTB 25-34
he purpose of this communication is to inform Maserati dealers that, in certain vehicle functions deactivated at the next Key-On after Key-Off cycle, normal behavior may be misinterpreted as a fault. Beginning with BCM software release 19.2 (March 2024), the Load Shed Function was introduced. This system is not a malfunction but an intentional feature that manages the 12V battery State of Charge by temporarily disabling or limiting non-essential functions. The goal is to reduce unnecessary discharge and preserve battery health. Examples include: • A/C system • Heated seats / heated steering wheel • Mirror and rear window defroster • Interior lights / ambient lights • Head-up display • Easy entry/exit
MAS004864 MTB 25-33
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)
MAS004868 DS 25-28
This Diagnostic Sheet serves as a guide and provides a diagnostic path to help determine the root cause of certain HVAC concerns. This Diagnostic Sheet requires a BOL to be submitted. MODELS: Grecale, GT/GC, MC20 (All MY) WHEN DEALING WITH HVAC CONCERNS SUCH AS “AC NOT BLOWING COLD,” DO NOT ASSUME IT IS DUE TO LOW REFRIGERANT.
MAS004831 MTB 25-32
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
MAS004847 RU 25-23
This bulletin provides instructions for inspecting the cooling fan terminal positioning on certain Maserati GranTurismo and GranCabrio vehicles. In some cases, the terminal’s orientation may require adjustment to ensure optimal clearance and routing. Performing this check helps support reliable cooling system operation and avoids potential contact with nearby components. The update consists of a visual inspection and, when applicable, repositioning of the terminal.
MAS004769_A DS 25-29
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
MAS004834 DS 25-27
This document outlines the correct diagnostic and evaluation procedure when oil traces or leakage are observed on front or rear shock absorbers. It aims to help technicians distinguish between acceptable oil sweating and genuine component leakage requiring corrective action. MODELS INVOLVED: ALL (All MY).
MAS004818 DS 25-24
This bulletin provides a diagnostic checklist to identify, troubleshoot, and resolve issues related to the TBM2 (Telematics Box Module) system in Grecale, GranTurismo, and GranCabrio models. It outlines specific concerns associated with DTCs and step-by-step procedures to ensure accurate diagnosis and effective resolution of connectivity, communication, and hardware-related concerns. MODELS AFFECTED: M182 Grecale 2.0 L4 MHEV and M189 GranTurismo(All MY).
MAS004781 MCL 25-37
We are pleased to inform you that we have published the updated version of the "Introduction to the New Maserati GranTurismo" on ModisCS+. This update supersedes the previous circular letter MAS003504 and includes additional content related to the new GranCabrio. Our new Parts & Service mission is dedicated to ensuring a unique experience for our customers. This letter outlines important guidelines for the technical management of the new Maserati GranTurismo and GranCabrio. Developed at the Maserati Innovation Lab and manufactured at the Mirafiori Plant in Turin, the GranTurismo and GranCabrio are 100% made in Italy and embody Maserati's "Italian luxury performance" concept. Both models feature the revolutionary Neptune V6 engine in two variants: the Modena version with a 3.0-liter V6 Neptune Twin Turbo delivering 490 hp, and the highperformance Trofeo version based on the same engine, achieving a peak output of 550 hp.
MAS004789 DS 25-19
This diagnostic sheet is intended to assist technicians in identifying and differentiating engine oil leaks and sweating.
MAS004769 DS 25-18
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.
MAS004778 RU 25-15
Certain Maserati GranTurismo GranCabrio (M189) MY24 MY25 listed in MODISCS+ are involved in a Rapid Update that involves software updates to multiple modules. This electric absorption improvement can be reached by updating the following modules during the same intervention: • BCM (Body Control Module) • RFHM (Radio Frequency HUB Module) • SLML (Smart Lighting Module Right) • SLMR (Smart Lighting Module Left
MAS004774 RU 25-17
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.
MAS004330 MCL 25-31
The Rapid Updates (Campaigns) in the list below will be closed starting from June 16, 2025. Claims received after this date will no longer be accepted. 243 275 288 294 306 326 332 333 337 348 353 355 364 366 371 374 379 385 388 390 395 400 447 448 449 451 452 460 461 462 468 471 477 481 484 520 522 523 540 544 546 565 566 587 588 593 595 600 603 607 610 611 615 642 10272 10364 10443
MAS004589_A MTB 25-22
This bulletin provides clear instructions on how to perform a proper tightening torque check. Follow this procedure when requested or when analyzing the root cause of a fastener-related issue.
MAS004438_A MTB 25-16
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”
MAS003730_A MTB 25-17
The purpose of this communication is to provide a guideline concerning the execution of ECU software updates (ECUs) and to clarify how the EVO checks the availability of software updates for the ECUs installed in the vehicle.
MAS004711 MCL 25-25
The Rapid Updates (Campaigns) in the list below will be closed starting from May 12, 2025. Claims received after this date will no longer be accepted. Effective from the publication date of this document, the Mandatory Flag will be removed for all campaigns listed, allowing for easier management as we approach the closure period
MAS004704 MCL 25-24
After 7 years from the introduction of the Maserati Diagnosi EVO 2 (2nd generation), we inform you that Panasonic can no longer guarantee the repair of the hardware, therefore the swap service (Warranty repair/replacement exchange) may be discontinued during 2025 following the exhaustion of replacement components in stock.
MAS004669 MTB 25-13
Wheel Size Vehicle Config Update Info In case of rim replacement, which may involve the use of tires with a different rolling circumference, please note that a Proxy update is always required to adapt the Vehicle Configuration to the new wheel/tire combination fitted to the vehicle. Also remember that the required pressure can be different depending on the size of wheel rims/tires.
MAS004683 DS 25-14
GranCabrio Side Window Noise Diagnostic Guide.This Diagnostic Sheet serves as a guide and provides additional diagnostic info for possible side window noise anomalies. In the event of a concern relating to aerodynamic noise from the side windows of the New GranCabrio while traveling, the following diagnostics checklist must be applied and the required troubleshooting must be reported using Blue On Line (Factory Information) before adjusting the windows.
MAS004681 DS 25-11
Vibration/Distortion from door speakers Grecale/GranTurismo/GranCabrio. This Diagnostic Sheet serves as a guide and provides additional diagnostic info for possible abnormal door speaker noise anomalies.
MAS004673 DS 25-09
GranTurismo, GranCabrio: Air Suspension System Diagnosis This Technical bulletin serves as a guide and provides additional diagnostic info for possible Air suspension issues on GranTurismo and GranCabrio equipped with Air Suspension System. All Air Suspension concerns require a BOL to be opened with the included checklist attached (last page). ATTENTION! This bulletin supersedes MAS004471 RU 25-09 released on December 17, 2024. This bulletin has been updated with new diagnostic info. Please discard/remove all copies of the previous
MAS004488 MCL 25-15
This document provides general instructions for the storage of new vehicles, including the new GranTurismo. These instructions should be followed by the personnel responsible for managing Maserati vehicles prior to their final sale to customers. The updates pertain to the maintenance and care of MHEV vehicles equipped with lithium-ion batteries, as well as notes on routine maintenance to be conducted according to the Service Schedule (including engine oil). Additionally, new policies for checking the 12V battery state of charge, applicable only to Grecale, are also outlined.
MAS004627 MCL 25-18
We are pleased to inform you that a new Tutorship process has been defined that will cooperate directly with the suppliers of the main components of Maserati’s cars to promptly intercept potential issues, reducing diagnosis times and providing maximum assistance and know-how for the resolution of our clients’ cases. Through the direct support of professional technicians, the Aftersales Tutorship Team with the supervision of the HQ Blue on Line Team will be able to carry out detailed diagnosis on reports coming from the network. If an intervention on a component under Tutorship is needed (see Tutorship List attached), you will have to create a Blue on Line as a Support Request. It’s important that you accurately follow the instructions that you will receive and do not replace a component without authorization.
MAS004589 MTB 25-08
This Technical bulletin serves as a guide and provides info with the aim of providing indications about the proper way to perform a tightening torque check, in the case it is needed or requested. In order to allow a proper and effective analysis of the defective route cause.
MAS004578 MTB 25-05
This Technical bulletin serves as a guide and provides info for certain anomalies reported in by customers on seat linings that can be mistakenly addressed as a product defect.
MAS004438 MTB 25-03
This Technical information bulletin serves as a diagnostic guide for managing engine oil leaks and instructing related repairs.
MAS004331 RU 24-46
Certain Maserati GranTurismo GranCabrio BEV (M189) MY24 listed in MODISCS+ are involved in a Rapid Update to replace the front side vent trims. Some details were found to be out of tolerance and may have been mounted on the vehicle incorrectly which could cause a gap and consequently cause moisture to infiltrate which can lead to internal LED light side vent light malfunction. The procedure involves a replacement of both the aesthetic trims and the electrical wiring.
MAS004471 MTB 24-39
This Technical bulletin serves as a guide and provides additional diagnostic info for possible Air suspension issues on GranTurismo and some Grecale equipped with Air Suspension System.
MAS004490 MTB 24-30
his Technical bulletin serves as a guideline and outlines requirements when considering a possible engine replacement on Maserati vehicles. Please refer to Bulletin “MAS004175 PNP 24-01 Light Engine - Long Block Repairs Under Warranty” for further information.
MAS004464 MCL 24-51
As an essential component in the electrical system in Maserati vehicles, the battery plays a crucial role in ensuring reliable performance and safety. To help maintain battery peak condition, and ensure optimal performance, this bulletin covers important warranty policies, and guidelines for testing, maintenance, and diagnosis of batteries using the new E-XTEQ MAXIMUS battery charger/tester. Please refer to the most recently published “BOL Policy” and “Prior Approval Components List” to verify if a BOL Report is required for battery replacement.
MAS004465 MCL 24-52
To enhance customer satisfaction, a new policy requires testing of the 12V battery at the time of a new vehicle sale. The “MASERATI” E-XTEQ Maximus must be used to perform a load test on the 12V battery within 48 hours before the vehicle's delivery to the final customer.
MAS004419 MTB 24-35
This technical bulletin provides guidance and additional information on normal shock absorber operations that are often mistakenly identified as defective. It establishes criteria for inspecting and diagnosing shock absorbers for potential leakage to help prevent the unnecessary replacement of non-defective components
MAS004337 RU 24-26
Rapid Update 744 M189 GT GC - AGSM Software Update Certain Maserati GranTurismo (M189) and GranCabrio (M190) MY24 listed in MODISCS+ are involved in a Rapid Update to update the AGSM (Automatic Gearbox Shifter Module) software. This action is necessary to prevent the Park button from potentially getting "stuck ON" or the inability to shift the gear out of "P." This issue could prevent the vehicle from being moved and may result in DTCs P07BE-00/1E1700 being stored in the AGSM
MAS004334 MCL 24-42
his Bulletin provides new information regarding the Maserati Tutorship Process for Harman R1 ETM components.
MAS004322 RU 24-24
Certain Maserati GranTurismo and GranCabrio (M189) MY24 MY25 listed in MODISCS+ are involved in a Rapid Update to update the BSM (Braking System Module) software. This action is necessary to prevent the potential appearance of multiple warning lights on the instrument cluster during the initial key-on. In rare cases, a firmer brake pedal feel may occur.
MAS004276 RU 24-21
Certain Maserati GranTurismo GranCabrio Folgore (BEV) MY24 listed in MODISCS+ are involved in a Rapid Update to replace the front axle shaft screws. On a limited batch of vehicles, the front axle shaft screws may not meet manufacturing standards which consequently can cause an oil leak. To remedy this, The half shaft screws including the retaining plate will need to be replaced
MAS004293 RU 24-20
Certain Maserati GranCabrio MY24 listed in MODISCS+ are involved in a Rapid Update to either update the TBM software or replace the Telematics Box module (TBM) altogether. On some vehicles, customers may experience Sirius XM radio satellite connectivity issues which may result in a prompt message “Maserati Connect Module requires service” appearing on the MIA display
MAS004283 MCL 24-38
MDEVO Release 9.8.1 new features • New login interface • Active diagnosis introduction for Go direct function (only for BEV vehicles) • MY25 version for all vehicles, Hard Reset function (Active Diagnosis), specs update, general improvements.
MAS003827_A MCL 24-34
The document outlines important guidelines for the technical management of the new Maserati GranTurismo and GranCabrio. This document includes in detail: • Vehicle maintenance and periodic battery checks. • Indications of best practices and technical notes for Service. • Pre-Delivery inspection checklist. • Activation of the technical team. • Unveiling tech-doc/diagnosis and special tools
MAS004251 MTB 24-27
Grecale & GranTurismo 12 Volt Battery Best Practices- Diagnostic checklist for a "Dead Battery" concern.
MAS003095 MTB 24-21
This Technical bulletin serves as a guide and provides additional diagnostic info for possible steering wheel vibration when braking. This Bulletin serves as an ADDENDUM to MAS002731
MAS003821
Technical Information.
MAS003792
Technical Information.
MAS003928
Circular Letter.
MAS003929
Circular Letter.
MAS003891
Technical Information.
MAS003844
Diagnostic Sheet.
MAS003895
Technical Information.
Complaint counts are reports filed with NHTSA, not failure rates. A common model collects more of them than a rare one that breaks more often.