2004 Mazda MAZDA3

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.

There has been no accident- the vehicle is my mother in laws vehicle- my concern is while at work she has at times loaded our daughter into the vehicle- I inspected the vehicle one day while as an employee of Les Schwab- the driver cvc axle vibrates so bad from the boot being torn and having no lubrication- these axles power the vehicle forward and if not maintained can snap and cause damage- the wipers no longer work correctly- the tires are 2017 and old and weather cracked- potential to separate while driving or blow out on the heated pavement. upon inspection also found that the front shocks are blown out and bouncing in the mounts under the hood- causing the tires to not have the correct contact patch on the road thus decreasing traction and control- on top of all this the vehicle hasn't been registered since 2020 and has no insurance on the vehicle- again there has been no accident...yet- this is my concern- that if this vehicle continues to remain operational and on the road it not only puts the driver and occupants at risk but also other drivers- kids- teens and anyone that may be on the other end o the crash when the vehicle does snap the cvc axle or blow i out a tire

I HAD MY MECHANIC WORKING ON REPLACING A BURNT OUT LICENSE PLATE LIGHT WHEN HE DISCOVERED THAT THE TAIL LIGHTS WERE NOT WORKING. HE TURNED THE LIGHTS OFF AND BACK ON, AND THE TAIL LIGHTS STARTED WORKING AGAIN, TURNED THE LIGHTS BACK OFF AND ON AGAIN, AND THE TAIL LIGHTS WERE BACK TO NOT WORKING AGAIN. HE IDENTIFIED THE FUSE BOX TO BE THE CAUSE OF THIS ISSUE, AS WHEN THE TAIL LIGHTS WERE OUT, HE WOULD HIT THE FUSE BOX WHICH WOULD THEN CAUSE THE LIGHTS TO COME BACK ON, AND HE DEMONSTRATED THIS FOR ME. THIS IS A SERIOUS SAFETY CONCERN TO ME AND AFTER ONLY A FEW MINUTES OF INTERNET RESEARCH I FOUND OTHERS WERE HAVING THE EXACT SAME ISSUE. I FEEL VERY FORTUNATE THAT I'VE NOT BEEN HIT FROM BEHIND. I'VE CALLED MAZDA AND THEY SAID THEY WERE NOT AWARE OF A KNOWN ISSUE AND THERE WERE NO RECALLS ON THE PART, BUT I'VE ALSO LEARNED THAT THIS PART HAS BEEN REISSUED 6 TIMES. THIS MAKES ME THINK IT HAS TO BE A KNOWN ISSUE, OTHERWISE WHY KEEP MODIFYING THE PART? *TR

TL* THE CONTACT OWNS A 2004 MAZDA MAZDA3. THE CONTACT STATED THAT THE POWER STEERING WARNING LIGHT ILLUMINATED AND THE STEERING WHEEL BECAME INOPERABLE. ALSO, THE CONTACT MENTIONED THAT THE EXTERIOR AND INTERIOR LIGHTS FAILED. THE VEHICLE WAS NOT TAKEN TO A DEALER. THE VEHICLE WAS NOT REPAIRED. THE MANUFACTURER WAS NOT MADE AWARE OF THE FAILURE. THE FAILURE MILEAGE WAS 125,000.

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

WHILE DRIVING ON THE FREEWAY AT 65 MPH AT NIGHT, MY LOWER DASH (RADIO, HVAC) AND STEERING WHEEL CONTROLS LIGHTING WENT OUT FOR ABOUT TEN MINUTES, AND THEN CAME BACK ON. THIS STARTED HAPPENING INTERMITTENTLY FROM THAT POINT ON, SHUTTING OFF AND COMING BACK ON RANDOMLY, WITH THE LIGHTS BEING OUT CONTINUOUSLY ONCE FOR ABOUT 30 MINUTES WHILE DRIVING AT NIGHT IN TRAFFIC. THE SAFETY CONCERN IS THAT I JUST DISCOVERED THE TAIL LIGHTS WERE ALSO GOING OUT AT THE SAME TIME. INDICATIONS ARE THAT THE CAUSE IS A DEFECTIVE PASSENGER JUNCTION BOX (PJB). THIS IS A SERIOUS SAFETY ISSUE AND AN UNACCEPTABLE ENGINEERING FLAW WHICH APPEARS TO AFFECT OTHER DRIVERS OF THIS VEHICLE MODEL AS WELL. DUE TO PROHIBITIVE COST OF JSB REPLACEMENT AND UNCERTAINTY OF THE INTEGRITY OF THAT PART ITSELF, IT MAY BE NECESSARY TO INSTALL A FAILSAFE INDEPENDENT WIRING SOLUTION FOR THE BRAKE LIGHTS TO ENSURE REQUIRED RELIABILITY

ELECTRICAL SYSTEM FAILURE VEHICLE, MAZDA 3 MANUAL, WAS RETURNED TO DEALER AFTER AIRBAG RECALL MAINTENANCE WAS PERFORMED. VEHICLE'S ELECTRICAL SYSTEM SUFFERED FROM MANY COMPLAINTS. SERVICE DEALERSHIP STATED THAT A LOOSE GROUND WIRE AT ONE OF THE FUSE PANELS WAS THE FAULT. VEHICLE'S ELECTRICAL SYSTEM RAN AS PROMISED FOR MONTHS UNTIL BOTH LOW-BEAM HEADLAMPS BLEW AT THE SAME TIME. THE DEALERSHIP HAS BEEN NOTIFIED AND ACTION WILL TAKE PLACE. I HAVE EXPERIENCED SEVERAL ELECTRICAL FAULTS IN THE VEHICLE AND ASSUME MANY MORE ARE TO COME. SAFETY WAS SEVERELY COMPROMISED. NO HEADLAMPS AT NIGHT IN A CONSTRUCTION ZONE IS VERY MUCH A PROBLEM. *JB