e30

I've had the pleasure of owning a 1984 325e for nearly 9 years. I've had several random ideas to improve the car.

Breakout Box I added a DIY breakout box to the factory ECU as there is no troubleshooting or diagnostic ports to speak of. This allows me to probe with a multimeter to observe the voltages running into and out of the ECU, letting me easily troubleshoot any faulty sensors or outputs.

Under Dash Lights I've added a 5V regulator and USB LEDs to the underside of the dash and seats to add nice ambient lighting when the door is open. As the overhead lights are blocked by my head, this offers some much needed light. Plus it looks really nice!

Digital PWM fan controller My cabin fan resistor popped recently. Instead of replacing the unit, this device allows individual speed settings to replace the factory default ones. This also uses PWM to efficiently change the fan speed to what the user wants.