in the upper control module
Remove the valet key from the fob and behind it is a small Phillips screw. After that the fob will split and the battery is visible.
The battery in the key fob of a Volvo v70 is changed by opening the case with a penny or nickel. The battery can then be taken out and a new battery slid into position.
CR2450
You'll probably need to have this done at a dealership.
What year model? They are 3 different ones.
The key fob receiver is located round the ignition key barrel Take off the plastic cover round the steering wheel, it's the black round plastic piece with an electrical plug fitted.
Press lock then unlock five times on the key fob.
There is a little button battery inside the key fob that sends a signal to the receiver in the car. The battery is probably dead.
looking for any help. Not an actual Key , its a key fob that goes into the port in the dash
the key fob battery is the battey in a key fob torch
the fob may need recoding to the vehicle, if you still have the second fob then point and operate this fob at the receiver (by the interior mirror) and operate the faulty fob at the same time, this should bring the second fob back into sinc. robb
Either via Infra-Red or Radio Frequency key fob programmed with a receiver in your vehicle.