To replace the inflatable restraint front end sensor, the first action to take before is the SIR system, for disabling. Do not hit or jolt the sensor, and have it well secured before applying power to prevent SIR deployment or personal injury. Start by dismantling the grille then loosen the fasteners attaching the front discriminating sensors to the radiator support and take out the sensor assembly. Place the sensor assembly so that it can reach the electrical connector, then remove the CPA and deconnect the sensor electrical connector before you remove the sensor from the vehicle. For installation, clear the mounting surfaces from dust, grease, or dirt, and then mount the sensor close to the radiator support and connect the sensor electrical connector. Mount the CPA onto the connector, mount the sensor assembly to the radiator support, and fasten it with the 2 fasteners. Tighten them up to 9 N.m (80 lb in). Lastly, reinstall the grille and turn on the SIR system.