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: Illuminated Entry System
When the illuminated entry system operates, the overhead lights, the courtesy lights, and an ambient light* turn on in the following conditions: The driver's door is unlocked after the ignition is switched OFF. The ignition is switched OFF with all doors closed. NOTE (Overhead lights) ...

Mazda 6 Service Manual: Recording of Vehicle Data
This vehicle is equipped with a computer which records the following main vehicle data related to vehicle controls, operation, and other driving conditions. Recorded data Vehicle conditions such as engine speed and vehicle speed Driving operation conditions such as accelerator and brake ped ...