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Service bulletins for the 2020 Maserati Quattroporte

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.

92 on file from NHTSA, as of 2026-10-19.

By type

By component

By trouble code

By topic

Bulletins, newest first
MAS0027622021-11-08. Service bulletin. SUSPENSION. Technical Information -Shock Absorber Leaks.
MAS0027462021-11-08. Service bulletin. STRUCTURE:BODY:DOOR. Technical Information - Door Panel Damage when removing the door panel.
MAS0007502021-10-25. Service bulletin. PARKING BRAKE. Mechanical adjustment and electronic adjustment of the parking brake.
MASB20002272021-10-25. Service bulletin. POWER TRAIN. Gearshift paddle retrofit.
MAS0025282021-03-15. Service bulletin. VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM; ENGINE AND ENGINE COOLING:ENGINE:ENGINE CONTROL MODULE (ECU/ECM):SOFTWARE. Service Campaign # 409 - HVAC software update to AC system that could stop caooling after 10 minutes at idle in area with high ambient temepratures and high humidity.
MAS0024642021-02-22. Service bulletin. EQUIPMENT; TIRES; WHEELS. Vehicle configuration update after the installtion of wheel rems/tires of different sizes
MAS0024532021-02-22. Service bulletin. STRUCTURE:BODY:DOOR. Diagnostic Procedure - Difficulty opening the door with vehicles equipped with "Soft Door Close"
MAS0024702021-02-01. Service bulletin. ELECTRICAL SYSTEM:SOFTWARE. Circular Letter - EVO Software update version Falco 6.4.2 reporting issues.
TT-662020-12-14. Service bulletin. EQUIPMENT; ENGINE AND ENGINE COOLING:ENGINE:ENGINE CONTROL MODULE (ECU/ECM):SOFTWARE. Follow these steps to successfully complete the vin writing and then the software programming activities.
MAS-00-08-832020-12-14. Service bulletin. EQUIPMENT; EQUIPMENT ADAPTIVE/MOBILITY. Campaign 268 Dome Reinforcement Plate Installation.
MAS0023242020-10-13. Service bulletin. ENGINE AND ENGINE COOLING; EQUIPMENT. Technical Bulletin - Engine coolant leaks from the cabin heater water delivery hose or the cabin heater water return hose.
MAS001382C2020-08-24. Service bulletin. EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL. Circular Letter - Tutor Process for Harmon Components
MAS0021992020-07-13. Service bulletin. EQUIPMENT; EQUIPMENT:ELECTRICAL; EQUIPMENT ADAPTIVE/MOBILITY. Circular Letter - Updated ETM Software Volta 6 -Troubleshooting guides to diagnose Base Audio System Reboot, Apple Carplay Disconnecting/Jamming and other anomalies.
MAS0022032020-06-15. Service bulletin. ELECTRICAL SYSTEM: INSTRUMENT CLUSTER/PANEL. Circular Letter - Diagnostic procedure for check engine light.
MAS0021582020-04-27. Service bulletin. EQUIPMENT; SERVICE BRAKES. Technical Bulletin: Communication to Dealer Technicians regarding whistle noise, from braking system, while driving (Small System) at a constant speed without the application of the brake pedal.
MAS002120i2020-04-27. Service bulletin. ELECTRICAL SYSTEM:SOFTWARE; EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL. Circular Letter - New ETM Software Volta 6 -Troubleshooting guides to diagnose Base Audio System Rebbot, Apple Carplay Disconnecting/Jamming and other anomalies.
MAS0021202020-04-27. Service bulletin. ELECTRICAL SYSTEM; EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL. Circular Letter - Upload of new software related to the Entertainment Module (ETM) on vehicles with ETM Software (Volta 6.0)

The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.