# Service bulletin 340613

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: 10148223
- Published by NHTSA: 2018\-11\-13
- Manufacturer's number: 340613
- Manufacturer's date: 2014\-08\-01
- NHTSA component: SERVICE BRAKES, HYDRAULIC; SERVICE BRAKES, AIR:ANTILOCK

## NHTSA's summary

INFORMATION 1. Brake Noise Submit a PuMA Info Only case when servicing the vehicle for a customer complaint of brake noise. Include in the case: \* Identifying the correct axle \* Photos of the pads, discs and calipers \* Sound recording/video of noise occurring Refer to the ISTA Repair Manual \(by model\) for brake service, diagnostic hints and proper lubrication points. Remove the buildup of pad material by carefully chamfering the edges all around the brake pads, using a file. Do not perform this repair if the brake pads and/or discs are worn below minimum thickness. Replace the worn brake parts. If the service is performed, refer to the Warranty information. Examples of components that do not need to be replaced, including cosmetic guidelines: 2. NAO\-specific color transfer since 2009 introduction Non\-asbestos Organic \(NAO\) brake pad material, by design, reduces brake dust and may generate a visible dark transfer layer between pads and discs. This behavior is specific to the stateof\-the\-art technology found in NAO pad material. Brake disc friction surfaces are exposed metal. When not in use and exposed to environmental elements \(moisture, salt, dirt\), surface rust can form. During initial braking, this will self\-clean and an audible groan and/or noise is temporarily heard until the disc surface is cleaned. This will not affect braking. The pad compound incorporates nonferrous metal, which can affect the appearance of the brake discs. Color transfer on friction surfaces: With heavy or extreme braking, color transfer to the disc from the pads is intensified and may generate dark spots or circular traces. Normal braking will gradually reduce the discoloration. This will not affect braking performance. No repair attempt is needed. 3. Light rust on friction surfaces performance. No repair attempt is needed. BMW brake discs are stamped with a minimum thickness value. The stamped minimum thickness is used to determine if the brake discs require replacement d

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2014/MC-10148223-9999.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2014/MC-10148223-0001.pdf)

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

## Components

Brakes, Anti\-lock brakes

## Vehicles listed

- BMW BMW

JSON: [/v1/bulletins/10148223](/v1/bulletins/10148223)

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