WenmarOpen by Wenmar Pro

Service bulletin WLP1

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 id10185149
Published by NHTSA2021-01-05
Manufacturer's numberWLP1
Manufacturer's date2020-12-22
NHTSA componentPOWER TRAIN:MANUAL TRANSMISSION; POWER TRAIN

NHTSA's summary

Porsche intranet posting with preliminary information on Workshop Campaign WLP1 (Workshop campaign for parts analysis) - Replacing manual transmission

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

Transmission and driveline, Manual transmission

Vehicles listed
PORSCHE 9112012, 2013, 2014

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
122-X7S6C-062017-08-01. Service bulletin. Concerns: Electric change-over valves Information: This is to inform you of a voluntary Workshop Campaign on the above-mentioned vehicles. There is the possibility that electric change-over valves, which may be susceptible to the ingress of moisture due to insufficient sealing, were installed in the affected vehicles. This can cause the change-over valves to malfunction over time. As a result, control over the closing valves in the clutch cooling system (PDK) and gear wheel set (PDK and manual transmission) may be impaired. In extreme driving situations (e.g. race starts, high ambient temperature, frequent gear changes), the transmission or clutch could overheat.
122-P4U9T-062017-08-01. Service bulletin. Concerns: Electric change-over valves Information: This is to inform you of a voluntary Workshop Campaign on the above-mentioned vehicles. There is the possibility that electric change-over valves, which may be susceptible to the ingress of moisture due to insufficient sealing, were installed in the affected vehicles. This can cause the change-over valves to malfunction over time. As a result, control over the closing valves in the clutch cooling system (PDK) and gear wheel set (PDK and manual transmission) may be impaired. In extreme driving situations (e.g. race starts, high ambient temperature, frequent gear changes), the transmission or clutch could overheat.