During hard cornering maneuvers, a rhythmic clicking noise may be emitted from the rear axle hubs
Porsche technical service bulletin 122-E4S9A-04 for 2015 Porsche 918 Spyder.
- Bulletin number
- 122-E4S9A-04
- Component
- Power train: axle assembly
- 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.
Vehicles covered
- Porsche 918 Spyder 2015 2015
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