Resistance Inspection

WARNING: This page is about a different car, the 2009 Mazda 6. However, it is still accessible from the selected car via links, so may be relevant.

Measure the resistance of the spark plug using a tester as shown in the figure.
- If not within the specification, replace the spark plug.
  Spark plug resistance [25°C {77°F}]
  
  3.0-7.5 kilohms
  
  Fig 1: Measuring Resistance Of Spark Plug
  Courtesy of MAZDA MOTORS CORP.