TSB Document:

• Sorry, the NHTSA has not posted this TSB document yet.

You can still get the detailed info from Porsche for this TSB. Call your local Porsche dealer's service department & ask for a copy of TSB# GRP4/9506.

Affected Component: SERVICE BRAKES, HYDRAULIC:POWER ASSIST:VACUUM

Summary

EXCESSIVE OPERATING NOISE FROM THE HYDRAULIC BRAKE BOOSTER PUMP. TO REDUCE THE OPERATING NOISE FROM THE HYDRAULIC BRAKE BOOSTER PUMP, A DAMPER (ARROW, FIGURE 1) CAN BE INSTALLED BETWEEN THE PUMP AND THE BRAKE SYSTEM ACCUMULATOR.

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