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.
Glass breakage sensors
Glass breakage sensors in the rear side windows and rear window are installed only in the V70/XC70, which is also equipped with a mass movement sensor (MMS). The glass breakage sensors are used to detect a broken rear window around the cargo compartment. The glass breakage sensors in the side windows are connected in series. The glass breakage sensor in the rear window is connected in series to the switch in the tailgate lock unit that indicates an open tailgate. When the alarm is activated, the rear electronic module (REM) checks that the connection is intact at regular intervals. Should an open circuit occur due to a broken window or opened tailgate, the rear electronic module (REM) triggers the alarm. The cause of the alarm can be read off and verified via VIDA.
Use the Manual With the Right Hardware
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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.