One problem related to transmission shudder has been reported for the 2003 Mazda MAZDA6. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2003 Mazda MAZDA6 based on all problems reported for the 2003 MAZDA6.
2003 Mazda6(s) manual transmission developed shudder when letting out the clutch in 1'rst gear. Seems to occur when the drive train has warmed up. Took it to the dealer who attributed it to the traction control being on. When I turned the tc off the problem was the same. I will take it back again and request the dealership ride with me to experience the problem. The problem did not develop until 13k miles (500 miles ago).