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Service bulletin No. 99-20

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.

The communication, as NHTSA indexes it (as of 2026-10-19)
TypeService bulletin
NHTSA id10179207
Published by NHTSA2020-09-02
Manufacturer's numberNo. 99-20
Manufacturer's date2020-08-07
NHTSA componentVISIBILITY

NHTSA's summary

Information on additional spare parts requirements for mirror supports.

The document

The document is the manufacturer's. This site does not hold it. NHTSA files a document at one of these two addresses; we have not asked NHTSA which.

Components

Glass, wipers and mirrors

Vehicles listed
PORSCHE 911 (997)2005, 2006, 2007, 2008, 2009, 2010, 2011 (the catalog's model; the bulletin names a series or trim of it)
PORSCHE BOXSTER (987)2005, 2006, 2007, 2008, 2009, 2010, 2011 (the catalog's model; the bulletin names a series or trim of it)
PORSCHE CAYMAN2005
PORSCHE CAYMAN2006, 2007, 2008, 2009, 2010, 2011

Listing a model year does not mean every vehicle of it is concerned: the document says which.

Recalls for the same vehicles and component
10V1250002010-03-30. VISIBILITY:SUN/MOON ROOF ASSEMBLY

A recall listed here may apply to some of the same vehicles. Only the manufacturer can say whether it applies to one vehicle.

Other bulletins for the same vehicles and component
No. D7652026-03-02. Service bulletin. Parts information for parts withdrawal involving the Window regulator motor. The part numbers affected are PAB959801 and PAB959802. The vehicles involved are ones that use the part numbers mentioned.
No. D7532026-02-06. Service bulletin. Parts information for Parts Withdrawal - LED Headlight. Vehicles affected are cars that use the part numbers in the attached PDF.
No. 25142025-06-02. Service bulletin. Instructions on advanced technical information for all models - Updated Primer Substance and Application Guidelines For Glass Installation/ Windshield and Glass Roof
No. D7022024-12-06. Service bulletin. Parts information for parts withdrawal involving the camera and control unit with the camera - PAD980551 & PAD980568C. The affected vehicles are cars that use the part numbers mentioned.
No. D6982024-10-07. Service bulletin. Parts information for parts withdrawal involving the windscreen. The cars involved are cars that use the part numbers 992845011Q, 992845011AN, 992845011S, 992845011AM, 992845011BL, 992845011DB, 992845047DY, 992845047FY
122-E3L8H-032017-10-25. Service bulletin. Cause: Noises can be caused by excessive relative movements between the individual components. Remedial Action: Rework sliding roof seal.
122-Y7J8H-062017-08-01. Service bulletin. Concerns: Tension rope for the convertible top rooflining Information: This is to inform you of a voluntary Workshop Campaign on certain 2011 911 Speedster (997) vehicles. There is the possibility that the tension rope for the convertible top rooflining may get caught on the linkage when operating the convertible top. As a result, this may cause the tension rope to break and the convertible top rooflining in the rear area will not be tensioned when the convertible top is closed.
D772008-07-16. Service bulletin. PARTS WITHDRAW; PORSCHE CARS NORTH AMERICA REQUESTS RETURN OF THE FOLLOWING UNITS TO PCNA: PART NUMBERS 955 628 320 00 AND 955 628 321 00; DESCRIPTION TIP SWITCH. *PE