2.3L Engine

Remove the LH front wheel and tire. See WHEEL AND TIRE REMOVAL/INSTALLATION .
CAUTION:
- Remove the electrical connector locators from the splash shield prior to removal.
Remove the leftside inner fender well splash shield
1. Remove the screws
2. Remove the pushpin
3. Remove the bolts
4. Remove the splash shield
  
  Fig 1: Removing Left Side Inner Fender Well Splash Shield
  Courtesy of MAZDA MOTORS CORP.
Disconnect the coolant bypass hose from the routing clip

Fig 2: Disconnecting Coolant Bypass Hose From Routing Clip
Courtesy of MAZDA MOTORS CORP.
Gently pry the positive crankcase ventilation (PCV) valve cap off the two tabs

Fig 3: Prying Off Positive Crankcase Ventilation (PCV) Valve Cap
Courtesy of MAZDA MOTORS CORP.
Remove the PCV valve from the crankcase vent oil separator and disconnect the vacuum hose

Fig 4: Removing PCV Valve From Crankcase Vent Oil Separator
Courtesy of MAZDA MOTORS CORP.
Install in reverse order of removal