Extra tools are required for installation. Replace and update your seat occupancy sensor. Once an accident occurs, this simulator activates like the original sensor (regardless of whether someone is on the car seat). After installing the simulator, the SRS fault warning light on the dashboard can be cleared (a diagnostic computer is required for the first time). Name: Car Seat Occupancy Mat Sensor SRS Bypass Emulator Fitment Type: Direct Replacement Install Fitment: This sensor is compatible with the following European models (includes all variants: convertible, coupe, estate, hatchback, M-Power, saloon) For models 1997-2016: For 1997-2003: E31, E36, E38, E39, E46, E53, etc For 2003-2007: E60, E63, E65, E66, E87, E90, etc For 2007-2010: E60, E63, E64, E65, E70, E71, E81, E87, E90, E92, E93, etc For 2010-2016: X6, X5 Instructions: Step 1: Open the simulator top cover and adjust the switch. Step 2: Locate the seat occupancy sensor unit under the front passenger seat, cut the wire, and reconnect it to the simulator. Step 3: Fasten the seat belt on the front passenger seat, then use a diagnostic computer (NOT INCLUDED) to turn off the SRS warning code for the first time. Note: 1. Please confirm compatibility with your vehicle before ordering. 2. Professional installation is highly recommended. 3. After installing the simulator, it will send a seat occupancy signal to the OBC regardless of whether someone is seated. Installation guide not included; professional installation is strongly recommended. Color: As Shown Material: Plastic Package Contents: 1 x Car Seat Occupancy Bypass Emulator MAT Sensor Only the above package content is included; other items are not included. Note: Light reflection and different displays may cause slight color variations between the image and the actual item. Measurement error allowance is +/- 1-3 cm.