Download 2015 Acura TLX Backup Sensors Installation Instructions – 1. Open the trunk lid. Disconnect the negative cable from the battery. 2. Pull the two levers, and fold the both rear seat back forward. 3. Pull back the weatherstrip, and remove the six clips from the trunk upper trim panel. 4. Remove the trunk floor lid. 5. Remove the trunk rear trim panel. 6. Remove the tool box. 7. Remove the trunk floor lining. 8. Pull back the weatherstrip. Remove the left trunk side trim panel. 9. Remove the rear bumper. • On each side of the vehicle, attach masking tape to the rear bumper, taillight, and rear fender as shown. • Remove the two caps, two flange bolts, six self-tapping screws, and two clips. • Release the nine retaining tabs on each side of the bumper. • With the help of an assistant, remove the rear bumper. • Place the rear bumper on a blanket. 10. Mark the inside of the rear bumper: • Locate the four scribe marks on the inside of the rear bumper at the center and left side. • Using a pushpin, pierce the rear bumper at the top and center of the two marks. NOTE: There are several markings on the inside of the rear bumper. Before piercing the rear bumper, verify the locations. NOTE: Make sure to pierce the scribe marks at a right angle to the rear bumper. 11. Mark the inside of the rear bumper: • Locate the four scribe marks on the inside of the rear bumper at the center and right side.