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Service bulletin MC340120

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 id10174374
Published by NHTSA2020-04-27
Manufacturer's numberMC340120
Manufacturer's date2020-04-01
NHTSA componentSERVICE BRAKES, HYDRAULIC:FOUNDATION COMPONENTS:DISC:CALIPER; SERVICE BRAKES, AIR:DISC:CALIPER; EQUIPMENT

NHTSA's summary

Front brake caliper weeping at the piston sealing ring or at the contact surface of the caliper parts when the motorcycle is parked/at standstill.

The document

The document is the manufacturer's. This site does not hold it. NHTSA files a document at one of these two addresses; we have not asked NHTSA which.

Components

Brakes, Equipment and accessories, Brake caliper

Vehicles listed
BMW BMW MOTORCYCLE

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