2004 Mazda Mazda3 Lighting Problems

This model car has a fuse box under the glove box known as a "passenger junction box" that has a faulty or defective relay soldered onto the circuit board. The relay is tied to lighting that includes the interior lights, exterior front parking lights, exterior rear tail lights, and the license plate light and is controlled by the left turn signal stalk (rotating switch). Based on my experience and many others (on the Mazda 3 forums), this relay has the tendency to fail and cause all of these lights tied to this relay to intermittently or permanently be disabled. There is no warning for this; the driver will only notice when driving at night that the interior illumination of the dashboard goes completely dark, which could cause disorientation and confusion as to whether or not the car is operable. Subsequently, the problem can be recreated by attempting to turn the lights on and off and there will be no response (and no clicking noise...it is audible when working and it switches on); the relay fails to operate and all the lights will not turn on. Driving at night without tail lights is extremely dangerous and I am surprised this has not caused serious injury from rear-ending incidents in nighttime or inclement weather situations. The serial/model number of junction box on my vehicle is BN8B-66730-C and many others on the forums have had the same issue with the same model, as well as other variations of the box. Some on the forums went as far as replacing the culprit relay (see attachment); however, at the risk of destroying the entire junction box and rendering the vehicle unusable. I finally ended up purchasing a replacement unit on eBay which corrected the issue so far and has made the lights reliable again.

THE TAIL LIGHTS GO OUT INTERMITTENTLY DUE TO A DEFECTIVE PASSENGER JUNCTION BOX (FUSE BOX). TAPPING THE BOX WITH A SCREWDRIVER HANDLE WILL BRING THE TAIL LIGHTS BACK ON FOR A WHILE. THIS HAS BEEN A MAZDA 3 ISSUE OVER THE YEARS. THE SHOULD BE A RECALL ON THIS.

HEADLIGHT CASING HAS ALWAYS ALLOWED MOISTURE AND CONDENSATION TO BUILD UP INSIDE OF THEM SINCE THE FIRST YEAR WE BOUGHT THE VEHICLE IN 2004. WE WERE ALWAYS TOLD BY MAZDA BAKERSFIELD THAI WAS A KNOWN DEFECT BUT NOT ANYTHING TO WORRY ABOUT. WE CONSTANTLY HAVE HAD TO REPLACE THE HEADLIGHT BULBS OVER THE YEARS. SOMETIMES THEY WOULD LAST SEVERAL MONTHS BUT ALWAYS THEY WOULD BURN OUT. IT WAS NOT UNTIL THE HEADLAMPS IN OUR NEW 2010 MAZDA 3 STARTED BUILDING CONDENSATION INSIDE DURING THE FIRST YEAR THAT WE AGAIN QUESTIONED THIS ISSUE. AGAIN WE WERE TOLD IT WAS A KNOWN DEFECT AND NOT A PROBLEM. IN NOVEMBER OF 2013 BOTH HEADLIGHTS ON OUR 2010 FAILED. ONLY THEN WE GIVEN THE TRUE INFORMATION THAT THE MOISTURE THEY ALLOWED TO STAY INSIDE THE HEADLAMP AREA IS WHAT WAS SHORTING OUT THE BULBS. THERE ARE MULTIPLE COMPLAINTS AND EVEN MULTIPLE SERVICE BULLETINS ON THIS EXACT ISSUE TELLING DEALER TO REPLACE THE HEADLAMP CASING. YET NO RECALL AND BECAUSE OF THAT AT LEAST 3SERVICE CENTERS WHERE WE HAVE TAKEN OUR VEHICLES FOR THE PAST 11 YEARS HAVE REFUSED TO ACKNOWLEDGE THE ISSUE AND REPAIR THE PROBLEM UNTIL NOW. NOW CONVENIENTLY THEY HAVE OFFERED TO REPAIR OUR VEHICLES. OF COURSE THAT'S TO E TUNE OF THOUSANDS OF DOLLARS FOR THE 2010 ALONE. THIS IS RIDICULOUS THAT SUCH A DANGEROUS DEFECT HAS BEEN ALLOWED TO CONTINUE FOR SO MANY YEARS. *TR