Before this a rodent (groundhog) chewed through two spark plug wires and all of the wires on both the upstream and downstream O2 sensors on my wife's Chrysler Town & Country and not knowing this until I started it, it shorted and took out the PCM/ECU. This took lots of $$$$ to replace all of those components as they don't sell just two spark plug wires and the PCM/ECU was several hundred dollars and on top of that the upstream O2 sensor exhaust manifold threads were damaged when I removed that sensor.