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: Traction Control System (TCS)
The Traction Control System (TCS) enhances traction and safety by controlling engine torque and braking. When the TCS detects driving wheel slippage, it lowers engine torque and operates the brakes to prevent loss of traction. This means that on a slick surface, the engine adjusts automatically ...

Mazda 6 Service Manual: Steering gear and linkage inspection
Rack Inspection 1. Inspect the rack for cracking, damage, and tooth wear. Replace it as necessary. 2. Measure the runout of the rack. Runout Near point A: 0.15 mm {0.006 in} max. Near point B: 0.20 mm {0.008 in} max. 3. If not within the specification, replace the rack. Tie-rod End ...