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BMW 650i Gran Coupe Air Bag Crash Sensor Replacement Cost

Know what price you should pay to get your vehicle fixed.

The average cost for a BMW 650i Gran Coupe air bag crash sensor replacement is between $390 and $411. Labor costs are estimated between $79 and $100 while parts are priced at $311. Estimate does not include taxes and fees.
Note about price: The cost of this service or repair can vary by location, your vehicle's make and model, and even your engine type. Related repairs may also be needed. Talk with a RepairPal Certified shop to learn which repairs might be right for you.

How does an Air Bag Crash Sensor work?

In the event of a collision and if that collision is severe enough, the crash sensor, a.k.a. airbag sensor, will sense the sudden deceleration of the vehicle by forcing a connection inside the sensor. When this connection inside the sensor is forced, either by a cam or a metallic ball, the crash sensor will send a signal to the SRS computer, which, as mentioned, will detect passenger seating positions, where airbags are needed, lock the seat belts, shut off the engine, and deploy the airbags as needed.

What are the symptoms of a bad Air Bag Crash Sensor?

When an airbag sensor or crash sensor has failed, the airbag warning light, which differs by vehicle year, make and model, will illuminate, alerting the driver that there is an issue detected in the SRS system. In some instances, the check engine light may illuminate in conjunction with the airbag light. In this case, the vehicle would likely not crank or start until the trouble code is cleared, again, depending on year, make, and model. Lastly, airbag deployment is a major symptom of crash sensor function, but typically failure will not cause the airbags to be incapable of deployment.

Can I drive with a bad Air Bag Crash Sensor?

Driving a vehicle with a faulty airbag sensor means that the airbags will not function in the event of an accident. Not only is this extremely risky, but if the airbags are not operational the vehicle will not pass any state or federal inspections. Any time the airbag warning light is displayed, immediate action should be taken to correct the fault, but the vehicle will be able to drive until that issue is repaired.

How often do Air Bag Crash Sensors need replacement?

Airbags tend to fail for two reasons, and neither are predictable. Collisions with any object with enough mass to trip the airbag deployment sensor will likely necessitate replacement due to physical damage to the sensor. This can happen within one mile of ownership, or never at all. Secondly, and typically for older cars, vehicles in humid climates, or vehicles which are subject to road sale and corrosion, the crash sensors can become rusted. In the event the sensor becomes rusted, this rust and corrosion can cause a short or open circuit situation, causing the sensor to illuminate the airbag warning light. Again, this depends on age and operating environment.