The onboard network control module (body control module) coordinates communication between the vehicle’s various electronic systems, acting as a central hub for the vehicle’s data network.
If you notice any of the following, the part likely needs replacement:
Multiple, seemingly unrelated electrical faults appearing together
Warning lights for various systems illuminating simultaneously
Diagnostic fault code related to the module itself
Installation information
Mounted centrally, connecting to the vehicle’s data network (CAN bus) and multiple wiring harnesses — requires specialist coding after replacement.
Frequently asked questions
This module coordinates communication between many different vehicle systems — a fault here can disrupt that communication network, causing symptoms across multiple systems that aren’t individually broken.
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Ilmars K.
August 2026
★★★★★
I ordered a Heater Blower Motor Resistor for a Toyota Avensis. Delivery took eight days from Latvia to Ireland. I installed it, and everything works perfectly. I wish this company success.
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Toyota Avensis
August 2026
★★★★★
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June 2026
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May 2026
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February 2026
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November 2025
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