# 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.

- Type: Service bulletin
- NHTSA id: 10152320
- Published by NHTSA: 2018\-12\-17
- Manufacturer's number: B720115
- Manufacturer's date: 2015\-04\-01
- NHTSA component: SEAT 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

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2015/MC-10152320-9999.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2015/MC-10152320-0001.pdf)

The document is the manufacturer's. This site does not hold it.

## Components

Seat belts

## Vehicles listed

- 2014 to 2015 BMW 428I
- 2014 to 2015 BMW 435I

## Other bulletins for the same vehicles and component

- [B720115](/bulletins/10146560.md), 2018-11-05, Service bulletin: SEAT BELTS. 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.

JSON: [/v1/bulletins/10152320](/v1/bulletins/10152320)

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