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Home >> Mini >> 2002 >> Cooper Base, Standard >> Repair and Diagnosis >> Restraints >> Restraints Control Systems >> Multiple Restraint System 4 - Overview >> MINI Multiple Restraint System 4 >> Multiple Restraint System (MRS 4) >> System Components >> Side (Thorax) Airbag Modules
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Side (Thorax) Airbag Modules

Fig 1: Side (Thorax) Airbag Modules
G04724623Courtesy of BMW OF NORTH AMERICA, INC.

The driver and passenger side (thorax) airbags are mounted to the front seat backrest frame and are designed to protect the ribs and upper internal organs during side impacts. The modules are side specific (i.e. a right hand module must be fitted to a right hand seat and a left hand module must be fitted to a left hand seat). The side airbags are activated by a control signal from the MRS control unit in the event of a side impact or a front angled impact of sufficient severity to cause both front and side airbag deployment.

The side (thorax) airbag module is consists of a molded plastic case which houses a folded nylon fabric bag, the gas generating capsules and an igniter squib. The rear of the side airbag module features two studs that are used for mounting the module to the seat frame and are secured in position by two nylon lock nuts.

The side airbag modules have a fly lead which terminates in a 2-pin connector. The connector connects to the control unit via the main harness and is located beneath the seat.

The side airbag has a capacity of 10.5 liters.

Fig 2: Components Of Side Airbag Module
G04724624Courtesy of BMW OF NORTH AMERICA, INC.

Workshop Hint 

If a new side airbag module shows any sign of damage, DO NOT USE. 

Workshop Hint 

Do not try to remove the connector at the module end, it is a permanent connection.