How to install a rear spoiler on a BMW i8 DIY

On the BMW i8, the installation of a rear spoiler first requires a compatibility check of the piece with the shape of the hatch and any existing profiles. Before securing anything, it's advisable to conduct a dry positioning test to check for centering, symmetry, and alignment with the edges, in order to avoid crooked installations or stress on the component.

To prepare the bodywork, thoroughly clean the contact area by removing dirt, wax, and residues: a degreased surface is essential, especially if the spoiler requires fixation via double-sided tape or specific adhesive/sealant. If the kit uses mechanical fastening systems (screws, bolts, rivets), accurately identify the anchoring points and protect the surrounding surfaces with masking tape to avoid marking the paint during the process.

Once you are certain of the position, proceed with the fastening according to the kit's instructions: if double-sided tape is included, apply it continuously and without interruptions in the designated areas, pressing evenly along the entire length and maintaining pressure for the necessary time to ensure good adhesion; if mechanical fastenings are required, gradually screw and tighten while alternating sides to avoid "pulling" the spoiler to one side.

Finally, check that there are no raised points, gaps, or misalignments, and ensure that the opening/closing of the hatch remains smooth.