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Service bulletin 122-H7C3C-04

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 id10173037
Published by NHTSA2020-04-01
Manufacturer's number122-H7C3C-04
Manufacturer's date2020-03-13
NHTSA componentSTEERING

NHTSA's summary

Updated instructions for replacing the trailing arm on the front and rear axle on affected Boxster and Cayman vehicles. There is a new supplier of parts and the entire axle must be checked to avoid cross use of parts.

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

Steering

Vehicles listed
PORSCHE 718 BOXSTER2016
PORSCHE 718 BOXSTER2018, 2019
PORSCHE 718 CAYMAN2016
PORSCHE 718 CAYMAN2017, 2018, 2019
PORSCHE BOXSTER2013, 2014, 2015
PORSCHE CAYMAN2013, 2014, 2015
PORSCHE redundant BOXSTER2017

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
SPTL26092026-10-02. Service bulletin. Special Tools and Equipment Information for alignment machines - Q3 2026 Software Spec Update Available
SPTL26082026-09-04. Service bulletin. Special Tools and Equipment Information for alignment machines - Q2 2026 Software Spec Update Available
87/20 48122026-07-07. Service bulletin. Noise Symptom - Creaking Noise can be Heard When Touching the Steering Wheel Cover: Reworking Front Steering Wheel Cover (SY 87/20)
No. D7332025-09-08. Service bulletin. Parts information for parts withdrawal involving (PAD423051B) the Steering Gear with Track Rods. The vehicles affected are cars that use the part mentioned.
No. 1403.12024-12-04. Service bulletin. Instructions on advanced technical information for a squeak and or rattle from the dash or instrument cluster area on the Boxsters, Caymans, and 911s.
122-B6E7G-102017-11-08. Service bulletin. The features of the particularly sporty GT sports steering wheels in leather (I-no. 858) or Alcantara (XLL) include: ? Steering wheel diameter: 360 mm ? In conjunction with PDK: Gearshift paddles for changing gear manually ? Including multi-function operation and steering wheel heating (489)
122-M6Z7N-062017-09-14. Service bulletin. Concerns: Control unit for steering-column switch (also referred to as combined steering-column module)/steering wheel electronics Information: Only for vehicles manufactured in production plant Osnabrück (VIN designation "K"): Malfunctions can occur during coding when enabling one of the following functions * Cruise control, * On-board computer, * Multi-function steering wheel or * Heated steering wheel Malfunctions can occur during coding in the steering-column switch (steering wheel electronics) control unit.
TI-40-132014-07-03. Service bulletin. PORSCHE: ON SOME VEHICLES, THE STEERING WHEEL ELECTRONICS OR CONTROL UNIT FOR STEERING COLUMN SWITCH WOULD HAVE A MALFUNCTION, DURING CODING, IN HEATED STEERING WHEEL, ON BOARD COMPUTER, CRUISE CONTROL OR MULTI-FUNCTION STEERING WHEEL. MODEL 2013 BOXSTER, BOXSTER S, CAYMAN, CAYMAN S. *PE