maf sensor
 

When i install my new maf should i disconnect the negative post on the battrie first ? After installing is there anything else that i should do besides hook up the plug in

Anytime you work on the vehicles electrical system you should disconnect the battery. This helps to prevent injury and damage to yourself and the car.

Have you gotten a copy of the E30 Bentley Service Manual yet?

If i unplugged the old one before i disconnected the old one and then plunged it back up do you think that the computer will reset it self when i install the new one. i also started the car after i plugged it back up

You should leave the battery disconnected for at least an hour to allow the computer to reset itself. With a new MAF the notice in engine performance should be immediately noticeable

Thanks for your response you seem to always to have a answer . THANKS