OBD Box

thingiverse

After a serious engine damage, I want an OBD monitoring (Torque) to be active in the background while driving, providing a real-time dash for calculated engine load. Unfortunately, affordable solutions online are scarce. My car's OBD is always on, so I bought a cable from eBay for under 20€ to switch off the Bluetooth adapter. If you're like me and often forget to turn everything off when shutting down the engine, this is an ideal solution. However, I prefer to replace the switch with an externally powered relay. This way, I can connect directly to pin 15 without interfering with the OBD cables. The 13x19mm switch has on-off-on settings, allowing me to keep the OBD on as designed, turn it off, or have it switched by the relay. Since I had TPU D58 shore filament in my printer, I decided to use it for this project - it doesn't rattle and looks great with the black dashboard trim. However, the lid is too weak to hold the cables securely. PET-G would be a better choice for future projects. To secure all the components together, I used wood screws (3.5 x 16 mm). The top hole needs to be re-drilled to accommodate the adapter's nose properly.