Mazda 6 Service Manual: No.7 slow return to idle

No.6 cranks normally but will not start

No.8 engine runs rough/rolling idle

Other materials:

Mazda 6 Service Manual: Indication on Display
The Distance Recognition Support System (DRSS) operation status is indicated in the active driving display or multi-information display. Regarding malfunctions, check the vehicle conditions or have it inspected by an Authorized Mazda Dealer according to the content of the displayed message. R ...

Mazda 6 Service Manual: SRS Air Bag Deployment Criteria
This chart indicates the applicable SRS equipment that will deploy depending on the type of collision. (The illustrations are the representative cases of collisions.) X: The SRS air bag equipment is designed to deploy in a collision. *1 (With Front Passenger Occupant Classification System) Th ...