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How to Replace the Diffuser in the BMW 3 Series?

Model: BMW Serie 3 F30, F31 - Years 2012-2019
Part: Rear bumper

In this tutorial, see how to replace the diffuser in the BMW 3 Series F30, which is the decorative element located at the bottom of the rear bumper. To do this, you will only need an 8mm socket wrench. First, go to the rear of the vehicle, then locate the 7 bolts on the underside of the bumper and remove them. Next, grasp the diffuser, pull it towards the rear of the vehicle, and detach it. At this point, simply install the replacement by following the reverse procedure.

Updated on 24 June 2026 by ScegliAuto

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