2012 Acura MDX Owner's Manual - Page 471

Collision Mitigation Braking System™ (CMBS™) Radar Sensor BOLTS (Do not tamper) Do not allow anything to impact the radar sensor or the radar sensor cover. If either of these parts receives a strong impact, switch the system off by pressing the CMBS off button, and have your vehicle checked by a dealer. If the front grille ever needs to be repaired, consult a dealer first. If the radar sensor cover or the radar sensor ever needs to be removed, take your vehicle to a dealer. RADAR SENSOR COVER The radar sensor is located under the Acura emblem in the front grille. If the radar sensor cover is covered with mud, dirt, dead leaves, wet snow, etc., or if you put a sticker on it, the CMBS will automatically shut off, and the CMBS indicator on the instrument panel will come on. You will also see a ''CHECK CMBS RADAR SENSOR'' message on the multi-information display for about 5 seconds. Always keep the radar sensor cover clean. If it gets dirty, clean it with water or a mild detergent. Never use chemical solvents or polishing powder. There are three bolts on the sides of the radar sensor. Do not tamper with these bolts, or you may cause the system to malfunction. When the CMBS is on, the radar sensor constantly scans for vehicles directly ahead of you. This means that driving on a road with a few or no vehicles could cause a CHECK CMBS RADAR SENSOR message to appear on the multi-information display. This is normal and not a cause for concern. 464