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Service bulletin No. 158-21

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 id10213080
Published by NHTSA2022-06-02
Manufacturer's numberNo. 158-21
Manufacturer's date2022-05-13
NHTSA componentSTEERING

NHTSA's summary

Information on WMM2 - replacing upper trailing arm on front axle.

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 CAYENNE2021

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

Recalls for the same vehicles and component
21V4930002021-06-30. STEERING:COLUMN

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
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. 227-242025-03-05. Service bulletin. Technical Information - Telephone Buttons on the Multi-Function Steering Wheel Occasionally Not Functioning: Re-Program Instrument Cluster Control Unit (227/24)
No. 268-222023-07-06. Service bulletin. Technical information for an activated warning message "power steering reduced" in conjunction with fault memory entry B200049.
No. 107-212021-09-02. Service bulletin. Porsche recall repair information for Recall Campaign AMB4 – Replacing Steering Column Screws on Steering Gear.
No. 111-212021-09-02. Service bulletin. Porsche service campaign information for Workshop Campaign WME2 - Retrofitting Control Unit for Steering Column Adjustment.
No. 02-21-12021-08-04. Service bulletin. Instructions for how to fix an issue where the steering column will not adjust upwards or downwards.
No. 80-212021-07-06. Service bulletin. Service campaign information for Porsche Workshop campaign WME1 - Adjusting Steering Wheel Position.