Body Control Module Replacement Cost Estimate

If the body control module is suspected of failure, most modern vehicles will be diagnosed through the use of a computerized scanner which will have the ability to test the functionality of the body control module. By applying different requests to the body control module and reviewing the outcome, the module can be diagnosed as working or faulty. In some cases, this may not provide all information needed, and testing of other components, the wiring harness, connectors, and separate control modules may be required to narrow the failure down to the body control module. This is because the body control modules is so integral to the function of such a broad array of systems and control modules.

Replacing any control module, including the body control module, requires removing obstruction components to gain access to the control module. The battery must be disconnected prior to removing electrical connections to the body control module, as this will prevent any power surging or unintentional grounding of battery current. Finally, the body control module fasteners and mounting brackets will be removed so the new module may be installed. Once reassembled, the body control module will receive the latest software updates from the manufacturer, and the system will be tested to prove the repair.

When replacing a control module, we recommend purchasing a new unit by providing your VIN to the manufacturer and requesting the module be bench programmed before shipping. This will add the VIN of the vehicle being repaired to the body control module, as well as program the module for all necessary functions. Even when this is done, the body control module and the powertrain control module must still be reintroduced, and this is done through a sequence native to the manufacturer of the vehicle. Instructions are normally provided with the new body control module, or the manufacturer may offer assistance.

Body control modules are not interchangeable from one vehicle to the next in most cases. A used body control module may or may not permit reprogramming, and if not, the vehicle will never pass its own security protocol to enable the engine to start. This is why, as indicated previously, we recommend purchasing a new unit, pre-programmed to your VIN.

Technicians undergo extensive classroom and hands on training in able to understand the operation and diagnostics of computerized systems on today's modern vehicles. Not only is extensive knowledge required, but diagnostic equipment which is not economical to purchase for the DIYer is likely required to perform the diagnostics and repair of computerized automotive systems. It is not recommended to attempt diagnosis or repair of the body control module unless the proper tooling and skills are present.