Subject: Inoperative Speedometer Models: 911 Carrera
Bulletin Number: 87 – 07
911 Carrera Model Year 1987
(Type 950 Transmission)
An inoperative speedometer or no speed reading to approximately 30 mph could be caused by a malfunctioning pulse sender.
An improved pulse sender is installed as of production date November 1986.
When replacing pulse sender, both sender and spring lock should be replaced.
Part Numbers:
911.606.210.00 Pulse Sender
911.606.219.00 Spring Lock

The pulse sender must be installed in the differential cover clean and absolutely straight in the cover, otherwise incorrect speedometer display could result.
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