# 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.

- Type: Service bulletin
- NHTSA id: 10233885
- Published by NHTSA: 2023\-04\-06
- Manufacturer's number: No. 122\-20
- Manufacturer's date: 2023\-03\-09
- NHTSA component: SERVICE BRAKES, HYDRAULIC

## NHTSA's summary

Technical information on a complaint \- brake noise

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2023/MC-10233885-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2023/MC-10233885-9999.pdf)

The document is the manufacturer's. This site does not hold it.

## Components

Brakes

## Vehicles listed

- 2017 to 2023 PORSCHE 718 BOXSTER
- 2017 to 2021 PORSCHE 718 CAYMAN
- 2023 PORSCHE 718 CAYMAN
- 2017 PORSCHE 911 CARRERA
- 2020 to 2023 PORSCHE 911 CARRERA
- 2017 to 2023 PORSCHE CAYENNE
- 2018 to 2023 PORSCHE CAYENNE S
- 2017 to 2023 PORSCHE MACAN
- 2017 to 2023 PORSCHE PANAMERA
- 2020 to 2023 PORSCHE TAYCAN
- 2022 PORSCHE redundant CAYMAN

## Recalls for the same vehicles and component

- [2024353](/recalls/tc/2024353.md), 2024-06-19: Brakes
- [24V455000](/recalls/nhtsa/24V455000.md), 2024-06-19: SERVICE BRAKES, HYDRAULIC:FOUNDATION COMPONENTS:HOSES, LINES/PIPING, AND FITTINGS
- [23V347000](/recalls/nhtsa/23V347000.md), 2023-05-16: ELECTRICAL SYSTEM: INSTRUMENT CLUSTER/PANEL; SERVICE BRAKES, HYDRAULIC
- [21V697000](/recalls/nhtsa/21V697000.md), 2021-09-08: SERVICE BRAKES, HYDRAULIC:FOUNDATION COMPONENTS; SERVICE BRAKES, HYDRAULIC:CRITICAL FASTENERS
- [19V735000](/recalls/nhtsa/19V735000.md), 2019-10-16: SERVICE BRAKES; ELECTRICAL SYSTEM: INSTRUMENT CLUSTER/PANEL
- [2019078](/recalls/tc/2019078.md), 2019-02-20: Brakes
- [19V115000](/recalls/nhtsa/19V115000.md), 2019-02-20: SERVICE BRAKES; ELECTRICAL SYSTEM: INSTRUMENT CLUSTER/PANEL
- [18V841000](/recalls/nhtsa/18V841000.md), 2018-11-28: SERVICE BRAKES, HYDRAULIC

## Other bulletins for the same vehicles and component

- [GR13D800](/bulletins/11035892.md), 2026-08-05, Service bulletin: SERVICE BRAKES. Parts Withdrawal \- 1 Set of Brake Pads for Disk Brake
- [GR13D798](/bulletins/11035890.md), 2026-08-05, Service bulletin: SERVICE BRAKES. Parts Withdrawal \- Brake Disc
- [No. 2210.3](/bulletins/11033623.md), 2026-06-05, Service bulletin: SERVICE BRAKES; ELECTRICAL SYSTEM. Instructions on advanced technical information for 9YA – Electric Parking Brake Warning in the Instrument Cluster
- [No. 2309.3](/bulletins/11032392.md), 2026-05-07, Service bulletin: ELECTRICAL SYSTEM; SERVICE BRAKES. Instructions on advanced technical information for 718 GTS 4.0 \- Brake Booster \(Power Brake\) Warning in Instrument Cluster
- [No. 90\-21](/bulletins/11030877.md), 2026-04-07, Service bulletin: SERVICE BRAKES. Symptom based workshop manual for a Brake Symptom – Brake Pedal Travel Perceived as “Too Far”: Observe Specified Procedure
- [No. 105\-25\-1](/bulletins/11028380.md), 2026-02-05, Service bulletin: SERVICE BRAKES. Technical information for Active Malfunction Indicator Light in Conjunction with Fault Memory Entries Regarding Brake Booster "U01B400" and "C114113"
- [No. D752](/bulletins/11028352.md), 2026-02-05, Service bulletin: SERVICE BRAKES. 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\-1](/bulletins/11027031.md), 2026-01-06, Service bulletin: ELECTRICAL SYSTEM; SERVICE BRAKES. 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\-23](/bulletins/11027029.md), 2026-01-06, Service bulletin: SERVICE BRAKES; ELECTRICAL SYSTEM. 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. 2530](/bulletins/11026378.md), 2025-12-05, Service bulletin: SERVICE BRAKES. Instructions on advanced technical information for Y1A, 971, 9YB, 9YA – Brake Noise \& Long Brake Pedal

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