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Service bulletin B720115

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 id10152320
Published by NHTSA2018-12-17
Manufacturer's numberB720115
Manufacturer's date2015-04-01
NHTSA componentSEAT BELTS

NHTSA's summary

Front Safety Belt Slips Off Belt Extender. The customer states that the safety-belt extender on the front driver and/or passenger side fails to deliver the belt. One of the following situations may occur: 1. The belt extender fails to extend. 2. The belt extender extends, but the safety belt slips off the hand. CAUSE This may be caused by one or more of the following: ? The belt extender has mechanically and/or electrically failed. ? Excessive resistance from the safety-belt reel (twisted safety belt) does not allow the belt to extend properly, causing a failure to deliver the safety belt. ? The safety belt slips off the hand due to the geometry of the safety-belt extender, which fails to catch the safety belt for delivery.

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

Seat belts

Vehicles listed
BMW 428I2014, 2015
BMW 435I2014, 2015

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

Other bulletins for the same vehicles and component
B7201152018-11-05. Service bulletin. FRONT SEAT BELT: EXTENDER MALFUNCTION This Service Information bulletin supersedes SI B72 01 15 dated April 2015. . Upper seat belt extender system is failing to deliver the belt and may exhibit one of the following symptoms: A. Seat belt is slipping off/ not being captured by the extender hand B. The seat belt extender hand is broken C. The seat belt extender hand is making noises D. The seat belt extender housing is broken E. The seat belt extender motions are erratic or illogical. The belt extender has mechanically and/or electrically failed. Excessive resistance from the safety-belt reel (twisted safety belt) does not allow the belt to extend properly, causing a failure to deliver the safety belt. The safety belt slips off the hand due to the geometry of the safety-belt extender, which fails to catch the safety belt for delivery.