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.
Location of components
The alarm function uses the following components (may differ depending on the options and market):
| Position | Component | Position | Component |
| 3/62 | Switch in hood catch | 7/12 | Alarm diode |
| 3/74-3/77 | Switches in door locks | 7/100 | Inclination sensor module. Option /accessory |
| 3/78 | Switch in trunk lock | 7/122 | Mass movement sensor. Option /accessory |
| 3/112 | Climate control module | 7/135-7/137 | Resistive wires (Only V70/V70XC). Market dependent, option |
| 3/126, 3/127 | Drivers door module / Passenger door module | 10/13, 10/14 | Left and right turn signal lamps, front |
| 3/174 | Switch for reduced alarm. Only on cars with mass movement sensors and inclination sensor modules. |
10/15, 10/16 | Left and right turn signal lamps, Side |
| 4/56 | Central electronic module | 10/54, 10/47 | Left and right turn signal lamps, Rear |
| 4/58 | Rear electronic module | 16/35 | Siren control module |
| 4/70 | Upper electronic module | Key and lock cylinder | |
| 5/1 | Driver information module | Remote control |
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.
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