I have rpo E7Z but i cant find out what it means.
And i have E9Z - Speedometer key(delete) -what is a speedometer key???? (my english is not that good).

Next time do a search, chances are somebody else has already asked the question. I did a search for E7Z and this is what I found

E7Z : SENSOR, VEHICLE SPEED (DELETE)

Just do a search next time, less hassle from other members

Thanks

The speedo key delete and any other speedo delete rpos mean that the car was not a mechanical speedo but was electronic. While they were running these down the assembly line, the line workers needed to know to not install the speedo key because it would be electronic instead.

How does that work?

My 87 Sport Coupe has the E9Z RPO for Speedo Key (delete) yet I have a mechanical speedo. Weird