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Service bulletin PRO-20-38

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.

The communication, as NHTSA indexes it (as of 2026-10-19)
TypeService bulletin
NHTSA id10036731
Published by NHTSA2011-04-11
Manufacturer's numberPRO-20-38
Manufacturer's date1993-10-01
NHTSA componentSERVICE BRAKES, HYDRAULIC:FOUNDATION COMPONENTS:MASTER CYLINDER

NHTSA's summary

BOSCH (BRAKES): MINI MASTER CYLINDER SILICON ASSEMBLY FLUID. DURING MANUFACTURE OF THE MINI MASTER CYLINDER, BOSCH LUBRICATES THE PISTON BORE WITH A SILICONE FLUID TO FACILITATE COMPONENT INSTALLATION AND TESTING. NO MODEL OR MODEL YEARS LISTED. *PE

The document

No address for NHTSA's copy can be built for this communication. Ask the dealer for it by the manufacturer's number.

Components

Brakes, Brake master cylinder

Vehicles listed
BOSCH ZOPS HYDRAULIC BRAKES

Listing a model year does not mean every vehicle of it is concerned: the document says which.