NHTSA ID Number: 11018404
Manufacturer Communication Number: MAS004706 RU 25-12
TSB/Document Date: 2025-05-16
Summary
Certain Maserati
Grecale (M182) MY23 MY24 listed in MODISCS+ are involved in a Rapid Update to reposition the RFHM antenna. Under certain conditions, the RFMH system may encounter signal reception issues, resulting in errors and inconveniences for the customer. These may include difficulties in opening doors or the rear hood, despite proximity and the key being readily available. The procedure utilizes a set of components designed specifically for relocating the RFHM antenna from the original position to a position that improves signal visibility.
MAS004706
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Page 9 of 22
TECHNICAL SERVICE OPERATIONS
27. Disconnect the connector and remove the sun visor (1).
28. Repeat the procedure for the driver's side sun visor.
29. Continue by removing the grab handles
30. Open the indicated covers.
31. Release the indicated clips and remove the right front handle (1).
© 2025 Maserati North America
Aftersales
www.maseratiusa.com
MAS004706
All rights reserved. Reproduction or translation in
whole or in part is not permitted without
authorization from the publisher. Printed in USA
Page 10 of 22
TECHNICAL SERVICE OPERATIONS
32. Take care to compress the clips at the points indicated to release them, to avoid possible damage.
33. Repeat the procedure for the front left and rear handles, both right and left.
34. Remove the cable trim panel of the interior rear-view mirror (1) using the Teflon tool.
35. Remove and open the cover (1) and remove the screw shown below.
36. Carefully disengage and remove the right upper B-pillar cover (1).
37. Repeat the operation for the upper
© 2025 Maserati North America
Aftersales
www.maseratiusa.com
MAS004706
All rights reserved. Reproduction or translation in
whole or in part is not permitted without
authorization from the publisher. Printed in USA
Page 11 of 22
TECHNICAL SERVICE OPERATIONS
38. Lower the left rear seat and pull out the trim (1).
39. remove the screws shown
40. Do not remove the lower right C-pillar cover completely
© 2025 Maserati North America
Aftersales
www.maseratiusa.com
MAS004706
All rights reserved. Reproduction or translation in
whole or in part is not permitted without
authorization from the publisher. Printed in USA
Page 12 of 22
TECHNICAL SERVICE OPERATIONS
41. Repeat the procedure for the lower left C-pillar cover
Note: Do not remove the lower left C-pillar cover completely
42. Remove the cover (1) and remove the screw shown below.
43. Remove the rear luggage shelf (1).
© 2025 Maserati North America
Aftersales
www.maseratiusa.com
MAS004706
All rights reserved. Reproduction or translation in
whole or in part is not permitted without
authorization from the publisher. Printed in USA
Page 13 of 22
TECHNICAL SERVICE OPERATIONS
44. Remove the cover (1) and remove the screw shown below.
45. Using a plastic interior trim removal tool, remove the cover (1).
46. Disconnect the 2 connectors and the seat reclining control cable (1).
© 2025 Maserati North America
Aftersales
www.maseratiusa.com
MAS004706
All rights reserved. Reproduction or translation in
whole or in part is not permitted without
authorization from the publisher. Printed in USA
Page 14 of 22
TECHNICAL SERVICE OPERATIONS
47. Remove the rear window pillar cover (1) using a plastic interior trim removal tool.
48. Repeat the procedure on the left rear window pillar cover
49. Using a plastic interior trim removal tool, detach the passenger side dashboard side cover (1), then remove it.
50. Release the upper section of the corner cover of the right side panel (1)
51. Very carefully, detach the right-hand windscreen pillar trim panel (1) from the dashboard (2).
© 2025 Maserati North America
Aftersales
www.maseratiusa.com
MAS004706
All rights reserved. Reproduction or translation in
whole or in part is not permitted without
authorization from the publisher. Printed in USA
Page 15 of 22
TECHNICAL SERVICE OPERATIONS
52. Disengage the safety catch (1) and remove the right-hand windscreen pillar cover (1).
53. Repeat the operation for the left windscreen pillar cover
54. Remove the screw shown below.
55. Remove the screw shown below and remove the remote start and input antenna (1).
56. At this point, the car is ready for the rework operation and moving the antenna.
57. Disconnect the pink antenna connector and connect the green antenna cable 1 to RFHM. Connect the
green antenna cable 1 to RFHM. Note: Clips are pre-installed on the wiring harnesses to be used for repair.
© 2025 Maserati North America
Aftersales
www.maseratiusa.com
MAS004706
All rights reserved. Reproduction or translation in
whole or in part is not permitted without
authorization from the publisher. Printed in USA
Page 16 of 22
TECHNICAL SERVICE OPERATIONS
58. Plug the green antenna cable into the dashboard and reinstall the RFHM control unit
59. Fix the green antenna cable with cable ties and insert it through the duct, pointing towards the air vent opening
on the right.
60. Pull the antenna cable through the access indicated by the arrow on the side of the A-pillar, until it exits at
dashboard level.
© 2025 Maserati North America
Aftersales
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MAS004706
All rights reserved. Reproduction or translation in
whole or in part is not permitted without
authorization from the publisher. Printed in USA
Page 17 of 22
TECHNICAL SERVICE OPERATIONS
61. Now, going up the pillar, secure the entire green antenna cable with cable ties, as shown in the figure.
Leave the end connector disconnected for the moment.
62. At this point, retrieve the "blue" antenna cable and, using an acrylic polyester tape at least 40 mm wide,
fasten the cable by following the wiring already present and running along the roof, continuing around the
perimeter until it reaches the rear of the roof.
Note: The two connectors, the "green" antenna, and the "blue" antenna must ONLY be connected
afterward. Therefore, check that they are close but do not connect them at this time.
63. At this point, move the roof panel to clear the area of the rear cross member.
Warning: Make sure that all wiring
are disconnected
© 2025 Maserati North America
Aftersales
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MAS004706
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whole or in part is not permitted without
authorization from the publisher. Printed in USA
Page 18 of 22
Use protective eyewear when
drilling!
Protect the interior of the vehicle
from metal shaving using a cover!
TECHNICAL SERVICE OPERATIONS
64. TPMS ANTENNA RETROFIT BRACKET INSTALL: To mount and secure the TPMS bracket, it is necessary to drill
holes. Use the "TPMS bracket" TEMPLATE included with this bulletin, Position it and secure it as illustrated
below using Painter's tape.
65. Following the pattern, drill holes in the sheet metal using 5 mm and 6.5 mm diameter drill bits, at the positions
indicated on the template. Caution: Use drill bits with a maximum length of 50 mm.
Note: Some vehicles may not need holes to be drilled. The bodywork has already been updated at the
Plant. In this case, simply fit the new bracket directly and use the nut 675000324 on the stud present instead
of the rivet. Then continue to follow the instructions from step 68.
66. AFTER DRILLING THE HOLES: It is recommended to treat the perforated area with the appropriate protective
compounds (anti-corrosion primer) before proceeding further.
MAX
50 mm
mm
Refer to the instructions in the workshop manual.
▪ 09.AA.008 SEALANT AND CONSUMABLES in the ANTICORROSION PROTECTION section
© 2025 Maserati North America
Aftersales
www.maseratiusa.com
MAS004706
All rights reserved. Reproduction or translation in
whole or in part is not permitted without
authorization from the publisher. Printed in USA
Page 19 of 22
TECHNICAL SERVICE OPERATIONS
67. Now, first, fit the antenna with the new bracket using the screws and then fit the bracket + antenna assembly
on the car in the previously prepared area.
68. Secure the bracket by inserting the bracket clip into the 6.5 mm hole and use a rivet with a washer in the 5-mm
hole
Warning: For RIGHT-HAND DRIVE cars, fit the antenna to the bracket by rotating the component by 180°.
69. Now, connect the antenna connector with the "blue" cable and then the "blue" cable with the "green" cable.
70. To proceed with reassembly, carry out all the following tightening.
71. Tighten the indicated screw to a torque of:
© 2025 Maserati North America
Aftersales
www.maseratiusa.com
MAS004706
All rights reserved. Reproduction or translation in
whole or in part is not permitted without
authorization from the publisher. Printed in USA
Page 20 of 22
TECHNICAL SERVICE OPERATIONS
72. Check the integrity of the clips of each component.
73. Check the condition of the pins.
74. Check the fastener before installation
© 2025 Maserati North America
Aftersales
www.maseratiusa.com
MAS004706
All rights reserved. Reproduction or translation in
whole or in part is not permitted without
authorization from the publisher. Printed in USA
Page 21 of 22
TECHNICAL SERVICE OPERATIONS
75. Check the fasteners before installation and replace the component if damage is present.
76. Check the indicated safety catch before installation.
77. Check the integrity of the indicated retainers.
78. Re-install all removed components, following the procedure in reverse order.
79. Procedure complete.
© 2025 Maserati North America
Aftersales
www.maseratiusa.com
MAS004706
All rights reserved. Reproduction or translation in
whole or in part is not permitted without
authorization from the publisher. Printed in USA
Page 22 of 22
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TSB/Document ID: MAS004706 RU 25-12
Replacement Service Bulletin Number:
MFR Communication Date: 2025-05-06
MFR Internal Campaign ID/Software Version: Rapid Update 689
Communication Type: Service Campaign
NHTSA Components: UNKNOWN OR OTHER
MFR Component System:
MFR Component Subsystem:
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