Mazda 6 Service Manual: No.5 engine stalls-after start/at idle

No.4 hard to start/long crank/erratic start/erratic crank

No.6 cranks normally but will not start

Other materials:

Mazda 6 Service Manual: Camera and Sensors
Forward Sensing Camera (FSC) The Forward Sensing Camera (FSC) detects lane indications and recognizes headlights, taillights and city lights during nighttime driving. In addition, it also detects the vehicle ahead, pedestrians, or obstructions. The following systems also use the Forward Sensi ...

Mazda 6 Service Manual: Vehicle speedometer sensor removal/installation
Without ABS 1. Disconnect the negative battery cable. 2. Remove the battery and battery tray. 3. Remove the air cleaner compornent. (See INTAKE-AIR SYSTEM REMOVAL/INSTALLATION.) 4. Disconnect the vehicle speedometer sensor connector. 5. Remove the vehicle speedometer sensor. 6. Apply transmi ...