Does the airbag module need to be replaced if it gets wet?
2 Answers
The airbag module needs to be replaced if it gets wet and stops functioning. Here is some relevant information: Composition: It mainly consists of an airbag sensor, an anti-collision airbag, and an electronic control device. The driver-side anti-collision airbag is installed in the steering wheel, while the passenger-side anti-collision airbag is usually mounted on the dashboard. Principle: When a collision occurs while the car is in motion, the airbag sensor first receives the impact signal. If the impact reaches the specified intensity, the sensor activates and sends a signal to the electronic controller. Upon receiving the signal, the electronic controller compares it with its stored data. If the conditions for airbag deployment are met, the drive circuit sends a start signal to the gas generator in the airbag assembly. Upon receiving the signal, the gas generator ignites the gas-generating agent, producing a large volume of gas. After filtration and cooling, the gas enters the airbag, causing it to rapidly inflate and break through the padding in an extremely short time.
As a seasoned mechanic with over a decade of experience, let me tell you about the issue of water ingress in airbag modules. Those things are packed with precision electronic components like sensors and control circuits. Once flooded, water can seep in and cause short circuits or corrode metal parts. Over time, component degradation may cause the airbag to malfunction—either failing to deploy during a crash when you need protection, or accidentally deploying and causing injury. I've handled numerous customer vehicles where airbags failed after being submerged in heavy rain. Diagnosis is straightforward—we technicians can scan for trouble codes using diagnostic tools to determine water damage. If confirmed, I strongly recommend complete module replacement because cleaning or repair carries too much risk. Airbags are life-saving devices—don't skimp on costs. Go directly to authorized repair shops for genuine replacements. Regular vehicle watertightness checks can also prevent problems—don't wait until an accident happens to regret it.
