Many first-generation Honda Insights eventually suffer from the heater control knobs cracking or snapping off the stem, leaving you with no easy way to adjust the climate controls. You can thankfully still order them from the dealer, but why not repair a part when possible?
This insert is designed as a straightforward, durable fix. Simply print the part, trim any remaining stem from your broken knob, and press-fit the insert in place. No special tools are required. You can use a small dab of adhesive if you prefer, but it’s usually not necessary – the fit is snug enough to hold securely on its own.
The insert retains the factory illumination, so the backlighting still works once installed. Unlike the original injection-molded stem, which is prone to splitting under load, this replacement has reinforced walls and a more robust profile.

