The following steps will allow you to conduct a Counter Reset on a Mazda 3 2.0 ltr 2006 – 2009
Locate the Service Plug behind the radiator. See FIG 1
Remove the dust cap to expose the terminals inside See FIG 2.
Connect an Earth wire between the top right hand female terminal & battery negative (chassis earth). See FIG 3
Turn on ignition & wait till lights go out, pump accelerator 10x. Switch off ignition and switch on again. Remove Earth wire from plug and you’re finished.