2010 BMW 335Cic Convertible (E93) L6-3.0L Turbo (N54) Technical Service Bulletin # 541209 Date: 091201
Body - Retractable Hardtop Leak Repair Information
SI B 54 12 09
Special Roofs
December 2009
Technical Service
SUBJECT
2010 BMW 335Cic Convertible (E93) L6-3.0L Turbo (N54) 265
Water Leaks from the RHT
MODEL
E93 (3 Series Convertible)
INFORMATION
The retractable hardtop (RHT) uses a complex sealing system which is sensitive to variation. As a result, if a water leak is present, it can be repaired
fairly easily, provided certain recommendations are followed. To aid in these repairs, two videos have been developed and should be reviewed prior
to performing diagnosis or repairs.
Video 1: Topics
This video focuses on water leaks from the area of the A-pillar and includes detail on how to:
^ Properly water test
^ Diagnose the root cause
^ Repair the leak
^ Adjust the window glass
Availability:
Currently available via the Interactive Career Pathway (ICP). This video can be found by searching for course code VO720, or by selecting the link
in the Technical Service Information section of the ICP homepage.
Video 2: Topics
This video addresses diagnosis and repair of leaks from the A-pillar, B-pillar, and C-pillar areas of the RHT.
Availability:
^ One copy of this video was sent to each BMW center in early November 2009.
^ A very limited number of DVDs is available through the parts department, should the one sent automatically be unavailable.
^ This video will be posted on ICP with a unique course code by the 1st quarter of 2010.
Important information
This video references an "impregnating fluid" which is unavailable in the US. As an alternative, BMW "Soft-Top Repellent" should be used.
The foam insert referenced in the video is available through the parts department. However, the insert from the old cowl seal may be reused if one
was present.
Tips and Recommendations
^ View both videos prior to the first repair of an E93 RHT water leak.
^ Check for applicable Service Information bulletins prior to performing repairs.
^ Symptom-based diagnosis via ISTA should be utilized during the diagnosis process.
^ Roof shell seals should not be replaced unless the bond is broken between the seal and the roof shell, or if it is physically damaged.
^ When replacing a roof shell seal, a similar part to what was originally installed should be used (pre- or post-2009), due to incompatibility of the 2
design levels.
^ When replacing a roof shell seal, the proper adhesive is referenced in SI B54 03 08, not in the Electronic Parts Catalog (EPC).
^ The roof shells and the frame itself are precisely adjusted during assembly and should not be adjusted in service to address water leak concerns.
^ Door windows must always be adjusted when replacing roof shell seals or when addressing water leaks from the A-pillar area, following the
Repair Instructions implicitly.
2010 BMW 335Cic Convertible (E93) L6-3.0L Turbo (N54) 266
