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Service bulletin 122-C4M9S-09

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 id10148778
Published by NHTSA2018-11-19
Manufacturer's number122-C4M9S-09
Manufacturer's date2018-08-17
NHTSA componentSERVICE BRAKES, HYDRAULIC

NHTSA's summary

Subject: Rear disc brake pads Symptom: If the vehicle is braked while driving at low speeds, a squealing noise can be heard shortly before the vehicle comes to a standstill. Cause: The disc brake pads can cause the squealing noise due to a change in the manufacturing process used by the supplier.

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

Vehicles listed
PORSCHE CAYENNE2018

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

Other bulletins for the same vehicles and component
No. D7522026-02-05. Service bulletin. Parts information for parts withdrawal involving the caliper without brake pads. The part numbers affected are in the attached PDF. The vehicles associated are cars that use the part numbers in the PDF.
No. D7492025-12-05. Service bulletin. Parts information for parts withdrawal involving the brake disc 9Y0615301AJ
D7192025-06-02. Service bulletin. Parts information for Parts Withdrawal - 1 Set of Brake Pads for Disk Brake. Vehicles included are all cars that use part number 992698451R
No. D6892024-08-06. Service bulletin. Parts information for parts withdrawal involving the brake hose 9J1611707F and 9J1611708F
No. D6842024-07-02. Service bulletin. Parts information for parts withdrawal involving the retainer for brake hose/brake line
No. D6812024-06-05. Service bulletin. Parts information for parts withdrawal involving the retainer for brake hose/pressure difference sender. (9J1611845C, 9J1611846C, PAB906051C)
No. 122-202023-04-06. Service bulletin. Technical information on a complaint - brake noise
No. 120-222022-10-04. Service bulletin. Symptom-based workshop manual for the PSCB brake system. Squeaking noises from around the front axle. Replacing brake discs and brake pads.
No. 1801.42022-04-05. Service bulletin. Advanced technical information for a brake squeal.
No. 111-202021-11-05. Service bulletin. Information on symptom-based workshop manual. Disc brakes - squealing noises at low speed from rear axle area.