B4000 keys not recognized

rdp · 03-09-2007, 01:48 PM

1999 B4000 won't start. Dealer indicated transponder didnt recognize keys (even though they had been used for several years w/o problem). Reprogrammed keys and started fine for approx 10 days then stopped starting again. Different dealer reprogrammed keys again and started fine for about 5 attempts then stopped again. Theft light flashes on/off quickly which indicates keys are not recognized. Dealer #1 has it in shop again and now cannot get it to start even after reprogramming and they are stumped. Any ideas or suggestions on how to fix/override/bypass, etc would really be appreciated

stuckinmytruck · 08-04-2007, 10:08 PM

well i work for a mazda dealer. make sure that the (new)keys they used are actual mazda keys. i have had keys from an aftermarket source work for a little while and then stop working. kinda sucks that way but also had the ford keys, that are supposed to be the same not work at all. so there is where i would go first. just a thought.

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03-09-2007, 01:48 PM	#1
rdp Junior Member Join Date: Mar 2007 Posts: 1	B4000 keys not recognized 1999 B4000 won't start. Dealer indicated transponder didnt recognize keys (even though they had been used for several years w/o problem). Reprogrammed keys and started fine for approx 10 days then stopped starting again. Different dealer reprogrammed keys again and started fine for about 5 attempts then stopped again. Theft light flashes on/off quickly which indicates keys are not recognized. Dealer #1 has it in shop again and now cannot get it to start even after reprogramming and they are stumped. Any ideas or suggestions on how to fix/override/bypass, etc would really be appreciated

08-04-2007, 10:08 PM	#2
stuckinmytruck Full Member Join Date: Jul 2007 Location: Sandy, Utah Posts: 10	well i work for a mazda dealer. make sure that the (new)keys they used are actual mazda keys. i have had keys from an aftermarket source work for a little while and then stop working. kinda sucks that way but also had the ford keys, that are supposed to be the same not work at all. so there is where i would go first. just a thought.