# Service bulletin 122\-E4S9A\-04

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: 10119286
- Published by NHTSA: 2017\-10\-15
- Manufacturer's number: 122\-E4S9A\-04
- Manufacturer's date: 2017\-03\-15
- NHTSA component: SUSPENSION; POWER TRAIN:AXLE ASSEMBLY

## NHTSA's summary

During hard cornering maneuvers, a rhythmic clicking noise may be emitted from the rear axle hubs. This noise is a non\-hazardous, non\-destructive characteristic of the vehicle. The root cause is the relative movement of the wheel and brake rotor against the 5 drive pins of wheel hub. This tiny amount of movement produces vibrations that are propagated through the rigid suspension joints and carbon fiber reinforced structure of the vehicle. Improper wheel nut tightening or trace amounts of lubricants, debris and corrosion between the hub, brake rotor and wheel all can facilitate this movement. Procedure: If the clicking sound becomes unacceptable to the customer, repair actions may be attempted that may provide at least a temporary solution. These should be implemented in two successive scopes depending on severity and reoccurrence.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2017/MC-10119286-9999.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2017/MC-10119286-0001.pdf)

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

## Components

Suspension, Transmission and driveline, Axle

## Vehicles listed

- 2015 PORSCHE 918 SPYDER

JSON: [/v1/bulletins/10119286](/v1/bulletins/10119286)

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