I scanned through the Mazda Technical Service Bulletins and there is one article on a frozen main relay. It seems mpisture can enter the relay and intermittently causes the relay to fail resulting in engine stopping.
As the symptoms described seems a likely relay fault, I would suggest replacing it. It is recommended to replace and relocate the main relay and fuel pump relay with the modified kit for 2003 to 2005 models.
Part Number - - - - - Description - - - - - - - Qty. - - - - - Note
L3Y1-18-8BX - - - - - Main Relay Kit - - - - - - - 1 ---
L3Y2-18-8BX - - - Fuel Pump Relay Kit - - - - - 1 - - - - - 2003-2005 Mazda6 Only
You should check with the local dealer regarding warranty and see if it is applicable to your vehicle with the following references.
Reference Number(s): 01-009/07, Date of Issue: February 22, 2007
MAZDA: 2003 - 2007 MAZDA6
Related Ref Number(s): 01-009/07
Monday, December 8th, 2008 AT 2:49 AM