2007 BMW 525I Structure Problems

I WAS DRIVING THROUGH A CANYON AREA, AND WATER SPILLED OUT OF MY ICE CHEST INTO THE TRUNK BAY, WHERE THE SPARE TIRE IS STORED. APPARENTLY THE ENTIRE CARS COMPUTER AND WIRING IS UNDERNEATH THE SPARE TIRE. THE WATER FRIED MY TIRE PRESSURE MONITOR MODULE, WHICH CAUSED THE COMPUTER TO RESTART. WHEN IT RESTARTED, THE CAR SHOWED A CAR COMPUTER FAILURE. THE CAR HAS SAFETY FEATURES SUCH AS STABILITY CONTROL, AND MANY OTHER SAFETY MODULES CONNECTED TO THE COMPUTER. THE CARS COMPUTER, INSIDE LIGHTS, GAUGES, AND ALL MY SYSTEMS COMPLETELY RESTARTED EVERY 30-45 SECONDS, CAUSING THE CAR TO BE A DANGEROUS TOY. I HAD TO DRIVE DOWN THE MOUNTAIN WITHOUT ANY SAFETY FEATURES ON MY CAR TURNED ON, WHICH MADE IT HARD TO CONTROL. IT WAS VERY UNSTABLE DRIVING, ALL BECAUSE OF A TIRE PRESSURE MONITOR MODULE GOING OUT. I SPENT OVER $55K ON THIS VEHICLE, I DON'T THINK GETTING...