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: Shift-Lock Override
If the selector lever will not move from P using the proper shift procedure, continue to hold down the brake pedal. 1. Remove the shift-lock override cover using a cloth-wrapped flat head screwdriver. 2. Insert a screwdriver and push it down. 3. Press and hold the lock-release button. 4. Mov ...

Mazda 6 Service Manual: Sas unit removal/installation
Warning Handling the SAS unit improperly can accidentally deploy the air bag modules and pre-tensioner seat belt, which may seriously injure you. Read AIR BAG SYSTEM SERVICE WARNINGS before handling the SAS unit. (See SERVICE WARNINGS.) Caution When replacing the SAS unit, config ...