Mazda 6 Service Manual: No.20 fuel odor (in engine compartment)

No.19 exhaust smoke

No.21 engine noise

Other materials:

Mazda 6 Service Manual: Engine Coolant Temperature Gauge (Without Multi-information Display)
Displays the engine coolant temperature. The white gauge indicates that the engine coolant temperature is low, and the red gauge indicates that the engine coolant temperature is high and overheating. CAUTION If the engine coolant temperature gauge indicator flashes, there is a possibility ...

Mazda 6 Service Manual: Vehicle speedometer sensor (vss) removal/installation
Caution Water or foreign objects entering the connector can cause a poor connection or corrosion. Be sure not to drop water or foreign objects on the connector when disconnecting it. If foreign materials are stuck to the VSS, disturbance by magnetic flux can cause sensor output to be ...