MAS003644 Service Bulletin/Repair Instructions

TECHNICAL SERVICE OPERATIONS
MAS003644 RU 23-35

RAPID UPDATE

FROM: Maserati TSO

TO: Maserati Network
Rapid Update 646

MC20 & MC20 Cielo – Check side mirrors
DATE: JULY 24 2023
Certain Maserati MC20 and MC20 Cielo (M240) MY23 listed in MODISCS+ are involved in a Rapid Update

to verify the integrity of the wiring of the external side mirrors.

Due to an assembly problem, it is possible that on some cars the internal wiring to the external rearview

mirror may have been pinched. In the long run, this can lead to deterioration of the wiring and lead to

malfunctions in the mirror movement 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 Pre-delivery checklist.
Please read and review this bulletin first before starting the procedure.

Contact your Regional AfterSales Manager (RAM) or the Technical Support Helpdesk if you have any

questions. (Maseratitechsupport@maserati.com)

Thank You for your continued support and cooperation.

Maserati Americas

Aftersales Dept.
© 2023 Maserati Americas

Aftersales

www.maseratiusa.com
MAS003644
All rights reserved. Reproduction or translation in

whole or in part is not permitted without

authorization from the publisher. Printed in USA
1
Procedure

TECHNICAL SERVICE OPERATIONS
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. Disconnect the 12V battery by following the procedure in the workshop manual:

a. 08.20.001 - BATTERY - Connection-disconnection of power supply

3. Following the procedure indicated in the workshop manual, remove the side mirror.

a. 9.35.001 OUTSIDE MIRROR PASSENGER SIDE Removal-Refitting or Replacement

NOTE: Both rear view mirrors must be inspected!

4. Once removal has been carried out, check the integrity of the wiring, paying attention and

identifying pinch marks or damage as shown in Figure 1.

Note: Refer to the image below to understand the type of damage that can be found
NOT OK

FIGURE 1

5.
Inspection results:

•
OK ► No sign of pinched or damaged wiring harness: Reassemble the mirror. Proceed with the

utmost care and attention when reassembling the mirror, reassembling all the removed parts by

following the removal procedure in reverse order. No further action needed.
•
NOT OK ► Wire harness is pinched and/or damaged: The mirror motor assembly must be

replaced. Continue to Step 6: Examples are shown in Figure 2.

NOTE: Take care not to scratch or damage the painted surfaces. Use masking tape if necessary.
FIGURE 2

© 2023 Maserati Americas

Aftersales

www.maseratiusa.com
MAS003644
All rights reserved. Reproduction or translation in

whole or in part is not permitted without

authorization from the publisher. Printed in USA
2
TECHNICAL SERVICE OPERATIONS
6. To replace the motor assembly, it must be removed from the mirror housing following the

procedure described in this bulletin in the following steps.

7. Connected the external rear view mirror connector to the door harness (1) (as shown in

Figure 3) and reconnect the 12V battery according to the procedure indicated in the

workshop manual. 08.20.001 – BATTERY - Power supply connection – Disconnection
FIGURE 3

8. Once the mirror has been connected to the vehicle's electrical system, close the external

rear-view mirror to access the screws indicated in Figure 4 and remove them.
FIGURE 4

9. Once the screws have been removed, it is possible to reopen the mirror and disconnect the

12V battery again.

10. Disconnect the connector (1). Figure 5
FIGURE 5

© 2023 Maserati Americas

Aftersales

www.maseratiusa.com
MAS003644
All rights reserved. Reproduction or translation in

whole or in part is not permitted without

authorization from the publisher. Printed in USA
3
FIGURE 6
12. The internal mirror links are now visible. Disconnect the indicated connectors. Figure 7
FIGURE 7

13. Undo the indicated screws. Figure 8
FIGURE 8
© 2023 Maserati Americas

Aftersales

www.maseratiusa.com
MAS003644
All rights reserved. Reproduction or translation in

whole or in part is not permitted without

authorization from the publisher. Printed in USA
4
TECHNICAL SERVICE OPERATIONS
11. With the utmost care, using a plastic trim removal tool, remove the external glass of the rearview mirror (1). Figure 6
TECHNICAL SERVICE OPERATIONS
14. Remove the gasket (1). Figure 9
FIGURE 9
15. Slide the mirror base (1) and the entire mirror body outwards as shown. Figure 10
FIGURE 10
16. At this point it is possible to replace the rear-view mirror motor assembly, reusing the rear-view

mirror assembly housing.

17. Reassemble all removed parts following the removal procedure in reverse order.

18. Perform a functional test.

19. Carry out the same procedure on the other side of the vehicle as well.

20. Procedure complete.
© 2023 Maserati Americas

Aftersales

www.maseratiusa.com
MAS003644
All rights reserved. Reproduction or translation in

whole or in part is not permitted without

authorization from the publisher. Printed in USA
5
Replace the component ONLY if the inspection did not pass (NOT OK):

Please order the following PNs, referring to the spare parts catalog and following the indications

contained in the included VIN-List.

Use the included VIN list to order the correct PN using the VIN
Complete VIN
VIN
Status
PN
ZAMBMRAB1P0413312

ZAMBMRAB4P0430864

ZAMBMRAB5P0418917

ZAMBMRAB0P0434967

ZAMBMRABXP0430870
413312

430864

418917

434967

430870
95

93

90

91

90
A

B

A

A

B
Type
Spare parts
PN
QTY
LEFT EXTERIOR MIRROR
670293592
1
RIGHT OUTSIDE REARVIEW MIRROR
670293584
1
LEFT EXTERIOR MIRROR
670293591
1
RIGHT OUTSIDE REARVIEW MIRROR
670293588
1
Type A
Type B
Warranty claim

Complete your warranty claim as follows:

Description
Code
Rapid Update Number
646
Cost code
23
Error code
063
Component Code
9.35.001
Operation Code

▪
Check 2 sides
9.35.001.A (1.60 h)
▪
Check 2 sides + Substitution 1 side
9.35.001.B (1.85 h)
▪
Check 2 sides + Substitution 2 sides
9.35.001.C (2.10 h)
© 2023 Maserati Americas

Aftersales

www.maseratiusa.com
MAS003644
All rights reserved. Reproduction or translation in

whole or in part is not permitted without

authorization from the publisher. Printed in USA
6
TECHNICAL SERVICE OPERATIONS
Spare Parts

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