Conversation so far:
when was the first in car navigation system invented
The Electro Gyro-Cator was claimed to be the world's first automated commercially available automotive navigation system in 1981.
Who manufactured the Electro Gyro-Cator system?
The Electro Gyro-Cator was co-developed by Honda, Alpine, and Stanley Electric Co..

Question: Which cars had the system?
Self-contained rewrite: Which cars had the Electro Gyro-Cator system?