From cars with RPO no. 9492, the control block under the steering wheel with the wiper and indicator stalks (comms 2000 unit) contains the receiver for the key fob remote. Cars before that RPO no. I do not know what is installed. If the key fob is not at fault, then it could be a problem with the comms unit but to check this would need a dealer diagnostic check. A new fob on our Picasso in 2005 was about £60, so 8 years later £100 may be about right and it would need to be initialised to the car using a dealer Lexia. The car RPO no. can be found in the car handbook/service book and on the car tyre pressure sticker on one of the front door pillars. There are 2 key fob synchronisation methods, depending on the car age. 4. Synchronisation of HF PLIP remote controls - early carsPerform the following operations :Put the HF key to be synchronised in position "ignition +"Press on the locking button (big button) on the HF keyWait between 5 and 10 secondsRelease the locking button on the HF keySwitch off the ignition with the HF keyWait 3 secondsThe ignition key HF PLIP is synchronised. 4. Synchronisation of HF PLIP remote controls - later cars (multiplexing assembly CAN VAN).N.B. : When replacing the batteries of an HF PLIP remote control, it is necessary to resynchronise the remote control.Perform the following operations :Put the HF key to be synchronised in position "ignition +"Within the next 10 seconds, press one of the HF key buttonsRelease the HF key buttonThe ignition key HF PLIP is synchronised.