Bosch Security Systems Customer Service Phone Numbers Inquiry Number: +4971140040990/+4971140040999 Customer Service: 1-800-289-0096 Technical Support: 1-800-289-0096 Warranty Repair: 1-800-366-2283 Bosch Security Systems Headquarters Info, Email, Phone number, Website and live chat Information Robert Bosch GmbH, or Bosch, is a German multinational engineering and electronics company headquartered in Gerlingen, near Stuttgart, Germany. It is the world’s largest