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Service bulletin No. 122-20

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 id10233885
Published by NHTSA2023-04-06
Manufacturer's numberNo. 122-20
Manufacturer's date2023-03-09
NHTSA componentSERVICE BRAKES, HYDRAULIC

NHTSA's summary

Technical information on a complaint - brake noise

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 718 BOXSTER2017, 2018, 2019, 2020, 2021, 2022, 2023
PORSCHE 718 CAYMAN2017, 2018, 2019, 2020, 2021
PORSCHE 718 CAYMAN2023
PORSCHE 911 CARRERA2017 (the catalog's model; the bulletin names a series or trim of it)
PORSCHE 911 CARRERA2020, 2021, 2022, 2023 (the catalog's model; the bulletin names a series or trim of it)
PORSCHE CAYENNE2017, 2018, 2019, 2020, 2021, 2022, 2023
PORSCHE CAYENNE S2018, 2019, 2020, 2021, 2022, 2023 (the catalog's model; the bulletin names a series or trim of it)
PORSCHE MACAN2017, 2018, 2019, 2020, 2021, 2022, 2023
PORSCHE PANAMERA2017, 2018, 2019, 2020, 2021, 2022, 2023
PORSCHE TAYCAN2020, 2021, 2022, 2023
PORSCHE redundant CAYMAN2022

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

Recalls for the same vehicles and component
20243532024-06-19. Brakes
24V4550002024-06-19. SERVICE BRAKES, HYDRAULIC:FOUNDATION COMPONENTS:HOSES, LINES/PIPING, AND FITTINGS
23V3470002023-05-16. ELECTRICAL SYSTEM: INSTRUMENT CLUSTER/PANEL; SERVICE BRAKES, HYDRAULIC
21V6970002021-09-08. SERVICE BRAKES, HYDRAULIC:FOUNDATION COMPONENTS; SERVICE BRAKES, HYDRAULIC:CRITICAL FASTENERS
19V7350002019-10-16. SERVICE BRAKES; ELECTRICAL SYSTEM: INSTRUMENT CLUSTER/PANEL
20190782019-02-20. Brakes
19V1150002019-02-20. SERVICE BRAKES; ELECTRICAL SYSTEM: INSTRUMENT CLUSTER/PANEL
18V8410002018-11-28. SERVICE BRAKES, HYDRAULIC

A recall listed here may apply to some of the same vehicles. Only the manufacturer can say whether it applies to one vehicle.

Other bulletins for the same vehicles and component
GR13D8002026-08-05. Service bulletin. Parts Withdrawal - 1 Set of Brake Pads for Disk Brake
GR13D7982026-08-05. Service bulletin. Parts Withdrawal - Brake Disc
No. 2210.32026-06-05. Service bulletin. Instructions on advanced technical information for 9YA – Electric Parking Brake Warning in the Instrument Cluster
No. 2309.32026-05-07. Service bulletin. Instructions on advanced technical information for 718 GTS 4.0 - Brake Booster (Power Brake) Warning in Instrument Cluster
No. 90-212026-04-07. Service bulletin. Symptom based workshop manual for a Brake Symptom – Brake Pedal Travel Perceived as “Too Far”: Observe Specified Procedure
No. 105-25-12026-02-05. Service bulletin. Technical information for Active Malfunction Indicator Light in Conjunction with Fault Memory Entries Regarding Brake Booster "U01B400" and "C114113"
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. 211-23-12026-01-06. Service bulletin. Symptom based workshop manual for a Brake Symptom - Yellow Warning Message “PSM Failure” in the Instrument Cluster: Checking Hydraulic Unit and Re-Program PSM Control Unit
No. 211-232026-01-06. Service bulletin. Symptom based workshop manual for a Brake Symptom - Yellow Warning Message “PSM Failure” in the Instrument Cluster: Checking Hydraulic Unit and Re-Program PSM Control Unit
No. 25302025-12-05. Service bulletin. Instructions on advanced technical information for Y1A, 971, 9YB, 9YA – Brake Noise & Long Brake Pedal