Customizable - Toyota Corolla front speaker housing cover

Corollas of certain years (2014-2016 in particular but probably others as well) are notorious for failing front speakers due to water ingress at the lower front door speaker connector and subsequent corrosion of the speaker wires.

There are many tutorials out there about fixing the issue by replacing the corroded wires and connectors (this one's great) but the position and shape of the connectors still allow water to pool, making it an potential recurring issue.

I've made a cover designed to have two cylindrical wire inlets, allowing to block water ingress by covering the wires and wire inlets with adhesive-line heat shrink tubing, that then surround the original speaker connector assembly, preventing water from dripping inside. I still recommend a good amount of dielectric grease as this is not airtight and condensation could still pool, but that definitely should help.

While the STL is specifically to the dimensions of the 2015 Corolla's connector housing and 16G silicone wire, the OpenSCAD file has the following parameters easily customizable - housing internal X, Y and Z dimensions, top chamfer size, side walls thickness, top side thickness (if you change the chamfer, make sure you adjust it so that it doesn't become too thin at the edge), wire inlets internal diameter, wire inlets wall thickness, wire inlets spacing (center to center).

Space between the door panel and the housing is very tight, so make sure your interlayer adhesion is good because the back wall can't be more than 1.2-1.5mm.