Some Renault vans can be upgraded from Thatcham category 2 immobiliser to Thatcham cat 1 alarm and immobiliser. Upgrading from Thatcham category 2 to Thatcham category 1 can reduce your insurance. The table below lists the vans that can be upgraded and lists the model of the insurance approved Thatcham upgrade device to be used. Fitting must be carried out by an Thatcham approved engineer for insurance purposes.