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: General procedures
PRECAUTION (SUSPENSION) Wheels and Tires Removal/Installation When a wheel is installed, tighten it to 88-118 N·m {9.0-12.0 kgf·m, 65.0-87.0 ft·lbf}. Suspension Links Removal/Installation Tighten any part of the suspension that uses rubber bushings only after the vehicle has been lowered ...

Mazda 6 Service Manual: Center roof antenna removal/installation
1. Disconnect the negative battery cable. 2. Remove the headliner. (See HEADLINER REMOVAL/INSTALLATION.) 3. Remove in the order indicated in the table. 4. Install in the reverse order of removal. 5. After installation, verify that the rubber of the center roof antenna is installed to the r ...