Underhood Wiring Problems of BMW 740

Smoke from engine and burning wires and electrical connectors at the plug to the engine cooling thermostat small fire extinguished with a small amount of water.

See all problems of the 2001 BMW 740 🔎.

Car was running fine, was at a stop light and the car shut off had a really strong electrical smell coming from the engine compartment. Opened up the hood and had a flame down at the thermostat area. Quickly put it out and pushed the car off to the side of the road. Had to have a tow truck come tow the car and bring my family out of the freezing cold as well. The thermostat and wiring from the ecu down to the thermostat had to be replaced as well as a fuse that had blown in the main engine harness. Old part was disposed of as well as the wiring.

See all problems of the 1997 BMW 740 🔎.

My car stumbled less than a mile from my house. A few hundred feet later it stalled completely. At first the garage thought it was a failed fuel pump. After replacing the pump, the car stumbled again and the ecu (engine computer) caught fire. After towing the car to a second garage they found a bad ground on the harness coming off of the thermostat that caused the fuel pump to fail as well as the ecu fire. They also found that the egs (transmission computer) had been destroyed by this bad ground also. Total repair bill for this failure, ~$4500.

See all problems of the 1998 BMW 740 🔎.

Smelled smoke in car before starting engine. Got out/ opened passenger side door, and saw fire coming out down near the seat area. Towed to BMW, and they stated a switch may have burned out and caused this fire. When air gets to fire it ignites. Normally fire would burn out but since the door was opened air got to wire and ignited a flame. Please provide any further information.