Maserati bulletin MAS005309 MTB 26-15
What it saysGranTurismo GranCabrio Door Module Door Opening Malfunction. NHTSA’s full summary ↓
Maserati filed this with NHTSA as a manufacturer communication dated Oct 13, 2026, received Oct 19, 2026, about the structure. It names 22 model years (2016–2027). A manufacturer communication is not a safety recall: it is the manufacturer telling its dealers how to diagnose or repair a condition, and whether the work is paid for depends on the warranty in force. Quoting the number at a service desk can save a diagnosis.
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What the bulletin says
Source: NHTSA's summary of the manufacturer's communicationGranTurismo GranCabrio Door Module Door Opening Malfunction. If the door window loses calibration, the automatic window raise function is disabled and door opening may be delayed by approximately two seconds. Repeated door-opening requests may also cause the window to make several short drops. Maserati S.p.A. is developing a dedicated software update to improve vehicle operation during this recovery condition and reduce the door-opening delay. The software update is expected to be available by the end of 2026.
Trouble codes it names: B2577 all 1 read from the document itself; NHTSA’s summary names none
Document filed under this number
| Document | Kind | Dated | NHTSA id | At NHTSA |
|---|---|---|---|---|
| MAS005309 MTB 26-15 | Other | Oct 13, 2026 | 11038572 | PDF, 160 KB |
The summary is NHTSA’s abstract of the document, as filed under 49 CFR 579.5. One communication is usually filed as several documents — the bulletin, a dealer notice, an owner letter — and the number on any of them finds this page. A PDF link is shown only once NHTSA’s own server has been seen to serve that document; the rest are checked over the following nights. Quote the number at a service desk; it is what the dealer’s system is keyed on.
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Model years it names
Source: as the manufacturer filed themAlso filed against model years this site has no page for: 2027 Maserati Grancabrio; 2027 Maserati Grancabrio Folgore; 2020 Maserati Granturismo; 2021 Maserati Granturismo; 2022 Maserati Granturismo; 2023 Maserati Granturismo; 2027 Maserati Granturismo; 2027 Maserati Granturismo Folgore; 2024 Maserati Nuova Grancabrio; 2025 Maserati Nuova Grancabrio; 2024 Maserati Nuova Granturismo; 2025 Maserati Nuova Granturismo.
A vehicle page’s bulletin list shows the newest few communications filed against that model year; the count there is every one.
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What owners reported
Source: NHTSA complaint databaseOwners of the 10 model years this bulletin names have filed 3 complaints with NHTSA since 2015.
A complaint is one owner’s account, not a defect finding, and a bulletin is not a recall. Nothing here says this bulletin was issued because of these complaints, or that the repair it describes fixed them. Complaint files on this site begin in 2015.
More bulletins about the structure
Source: same model, same component group11 other manufacturer communications filed against these Maserati models under the same component group (structure), newest first. The eight newest are listed; the rest are on the Maserati list.
| Number | Kind | Dated | NHTSA’s summary |
|---|---|---|---|
| RAPID UPDATE 827 | Service campaign | Jul 16, 2026 | Certain Maserati vehicles listed in MODISCS+ are involved in a Rapid Update to inspect the Soft Top Storage Area. The cargo spacer actuator… |
| RAPID UPDATE 816 | Service campaign | Mar 31, 2026 | GranTurismo –Trunk Lock Cover Check. Certain Maserati vehicles listed in MODISCS+ are involved in a Rapid Update to inspect and possibly re… |
| RAPID UPDATE 797 | Service campaign | Nov 11, 2025 | This bulletin outlines Rapid Update 797 for Maserati GranCabrio vehicles. The update includes multiple service actions to improve the perfo… |
| RAPID UPDATE 758 | Service campaign | Oct 8, 2024 | Certain Maserati GranTurismo (M189) GranCabrio (M190) MY24 MY25 listed in MODISCS+ are involved in a Rapid Update to carry out a door adjus… |
| RAPID UPDATE 757 | Service campaign | Oct 8, 2024 | Certain Maserati GranTurismo (M189) and GranCabrio (M190) MY24 listed in MODISCS+ are involved in verifying the correct positioning of the… |
| MAS004221 BOL 24-23 | Other | Jun 3, 2024 | This Diagnostic Sheet serves as a guide and provides additional diagnostic info for possible door operation anomalies for GranTurismo. |
| MAS004043 | Service bulletin | Mar 20, 2024 | Rapid Update to replace both rear wheelhouses (aka inner fender liner) with a new retaining nut. |
| MAS003773 | Service bulletin | Nov 23, 2023 | Rapid Update 664 to carry out a procedure to replace both A-pillar trim. |
Quote the number at the service desk. It is what the dealer’s system is keyed on.
Every manufacturer communication NHTSA holds for Maserati, by the number printed on the letter.
Common questions
Source: NHTSA, 49 CFR 579.5Is Maserati MAS005309 MTB 26-15 a recall?
No. A manufacturer communication is a manufacturer communication filed with NHTSA under 49 CFR 579.5; a safety recall carries an NHTSA campaign number (two digits, a letter, six digits) and a federal duty to repair for free. Check the vehicle’s recalls by VIN at nhtsa.gov/recalls, or on its page here.
Is the MAS005309 MTB 26-15 repair free?
Not automatically. A service bulletin describes how to diagnose or repair a condition; who pays depends on the warranty in force, any extension, and the dealer. Quoting the number can save a diagnosis either way.
Which vehicles does MAS005309 MTB 26-15 cover?
The manufacturer filed it against 22 model years: 2024 Maserati GranTurismo, 2019 Maserati GranTurismo, 2018 Maserati GranTurismo, 2017 Maserati GranTurismo, 2016 Maserati GranTurismo, 2026 Maserati Grancabrio and more. Whether one particular vehicle is affected is a matter of its VIN and its build, not its model year alone.