| You do not need to, and should not, perform any maintenance on or replace any
airbag system components yourself. However, you should have your vehicle
inspected by a dealer in the following situations:
■ When the airbags have deployed Similarly, once an automatic seat belt tensioner has been activated, it must be replaced. 
■ When the vehicle has been in a moderate-to-severe collision 
■ Do not remove or modify a front seat without consulting a dealer We recommend against the use of salvaged airbag system components, including the airbag, tensioners, sensors, and control unit. | 
Honda Odyssey Service Manual > Brakes: HondaVAC™ System Description
    Basic OperationThis system is composed of the rear MICU, the HondaVAC switch, the HondaVAC motor, the HondaVAC motor relay, and the keyless buzzer. The rear MICU controls the HondaVAC motor relay based upon one or more of the following conditions: Vehicle ignition mode Transmission range switch P p ...