Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Side Impact
In the event of a side-on collision, the sensors in the Supplemental restraint system module (SRS) (4/9) and the side impact sensors (7/115, 7/116, 7/208 and 7/209) evaluate the force of the mechanical stresses. The Supplemental restraint system module (SRS) determines which protection system is to be activated in the situation.
If the impact fulfils the conditions to activate the side airbags (8/51 and 8/52) and the door mounted inflatable curtains (8/66 and 8/67) and/or seat belt tensioners front (8/33 and 8/34), the control module sends a current pulse to those protection systems that are to be deployed. The side impact protection system will only be deployed on the side where the impact is registered.
The control module also transmits a collision signal on a directly connected cable to the central electronic module (CEM) (4/56) and the phone module (PHM) (16/60), so that these control modules can take certain actions.
A collision status signal is also sent to the phone module (PHM) and the central electronic module (CEM) via the controller area network (CAN).
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Disclosure: Verified tool recommendations may earn an affiliate commission at no cost to you.
When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.
Rather have a pro handle this?
A certified mobile mechanic comes to your home or office. They bring the tools, you stay comfortable. No tow truck, no waiting room, no surprises.
No obligation. See pricing before you book.