One problem related to engine stall has been reported for the 2003 Mazda MPV. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2003 Mazda MPV based on all problems reported for the 2003 MPV.
I have had to replace five of the six coils on my 2003 Mazda Mpv over 3 years. They fail frequently and cause the engine to miss or stall even while moving. Very dangerous in heavy traffic. I see this is a common problem with Mazda Mpv 2002 - 2006. Very expensive to replace the back coils - several hundred dollars. The front ones are easy to replace.