BMW Cars 1999-06

Service Precautions

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WARNING
The Supplemental Restraint System (SRS) must be disabled before performing service on or around system components, steering column, instrument panel components, wiring and sensors. Failure to follow safety and disabling procedures could result in accidental air bag deployment, possible personal injury and unnecessary system repairs.

Please take note of the following precautions whenever working on or near SRS air bag system components:



When carrying a live air bag module, point the bag and trim cushion away from your body. When placing a live air bag on a bench or other surface, always face the bag and trim cushion up, away from the surface. Following these precautions will reduce the chance of injury if the air bag is accidentally deployed.
 
Use only a digital multimeter when checking any part of the air bag system. The multimeter's output must be 0.01Amps (10mA) or less when it is switched to its smallest ohmmeter range value.
 
Do not bump, strike, or drop any SRS component. Store SRS components away from any source of electricity, including static electricity, moisture, oil, grease, and extreme heat and humidity.
 
Do not cut, damage, or attempt to alter the SRS wiring harness or its yellow insulation.
 
Do not install SRS components that have been recovered from wrecked or dismantled vehicles.
 
Always disconnect both battery cables when working around SRS components or wiring.
 
Always disable the air bag when working under the dashboard.
 
Always check the alignment of the air bag cable reel during steering-related service procedures.
 
Take extra care when working in the area of the dashboard. Avoid direct exposure of the SRS unit or wiring to heat guns, welding, or spraying equipment.
 
Never carry the inflator module by the wires or connector on the underside of the module.
 
When carrying a live inflator module, hold securely with both hands, and ensure that the bag and trim cover are pointed away.
 
Place the inflator module on a bench or other surface with the bag and trim cover facing up.
 
With the inflator module on the bench, never place anything on or close to the module which may be propelled in the event of an accidental deployment.
 



Click image to see an enlarged view

Fig. If removed, always place the inflator module facing up to avoid injury should accidental deployment occur



Click image to see an enlarged view

Fig. Cut away view of a spring-loaded SRS electrical connector. Never modify any SRS component



Click image to see an enlarged view

Fig. During removal, keep your body hands and fingers away from the center portion of the air bag should it accidentally deploy



Disconnect the driver's/front passenger's air bag and if equipped, the seat belt tensioner connections before working below the dashboard close to the SRS control unit.
 
If the vehicle is involved in a frontal impact or after a collision without airbag deployment, inspect the SRS unit for physical damage. If the SRS control unit is dented, cracked, or deformed, replace it.
 
If removed or replaced, make sure the SRS control unit is installed securely.
 
Never disassemble the SRS control unit.
 
When installing or replacing the SRS control unit, be careful not to bump or strike the area around the SRS control unit. Avoid using impact wrenches, hammers, etc. in the area surrounding the SRS control unit
 
Never reach through the steering wheel to start an air bag equipped vehicle.
 
If the air bag has deployed, the air bags, control unit, and if equipped, the seat belt tensioners must be replaced.
 
Individual components of the air bag system must always be replaced rather than repaired
 
Do not treat air bag system components with grease or cleaning agents
 
Avoid physical contact with a deployed air bag. Wear protective equipment such as necessary
 
Do not expose air bag components to temperatures above 167°F (75°C)
 
Replace any air bag component that has been dropped a distance of 1 1 / 2 feet (0.5 m) or more
 
A replaced component of the air bag system must always be properly disposed of
 

Several precautions must be observed when handling the inflator module to avoid accidental deployment and possible personal injury.



Never carry the inflator module by the wires or connector on the underside of the module.
 
When carrying a live inflator module, hold securely with both hands, and ensure that the bag and trim cover are pointed away.
 
Place the inflator module on a bench or other surface with the bag and trim cover facing up.
 
With the inflator module on the bench, never place anything on or close to the module that may be thrown in the event of an accidental deployment.
 

Several precautions must be observed when handling the inflator module to avoid accidental deployment and possible personal injury.



Never carry the inflator module by the wires or connector on the underside of the module.
 
When carrying a live inflator module, hold securely with both hands, and ensure that the bag and trim cover are pointed away.
 
Place the inflator module on a bench or other surface with the bag and trim cover facing up.
 
With the inflator module on the bench, never place anything on or close to the module that may be thrown in the event of an accidental deployment.
 


CAUTION
On vehicles equipped with an air bag, the negative battery cable must be disconnected, before working on the system. Failure to do so may result in deployment of the air bag and possible personal injury.

 
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