Bought a 2003 530i (e39) for $500 a few weeks ago and I am in the process of fixing it with a friend, but there are a few issues. Any tips on what I should focus on first to get it to pass smog. The car have some water damage as we found water inside underneath driver and passenger seat. It also overheat (change out radiator), but it possible coolant reservoir might still got a leak. Ran the code today and here's what we found : *abs check engine light on
*airbag light is on
*warning light is on (triangle with the !) *brake light is on
 242 Misfire cylinder 5 >check the spark plug, coil, oil in cylinder, injector cleaner?? 
123 Electronic thermostat control
10 Coolant temperature sensor
122 Engine oil temperature sensor
209 EWS (electronic immobilizer) manipulation check
53 Idle speed actuator - open coil
27 Idle speed actuator - close coil
100 ECU Self test
37 Switching delay main relay
214 Vehicle speed signal
149 CAN : ABS/ASC Wheel speed signal >change the ABS wheel sensor, but which one? Thank you
