Owner reports filed with NHTSA about this vehicle, newest first and reproduced as filed. They are unverified accounts: one proves nothing, and a pattern across many is the thing worth reading. Back to the full 2009 record →
WHILE DRIVING IN STOP AND GO TRAFFIC/PARKING LOTS, ETC., I HAD THREE SEPARATE INCIDENCES IN WHICH WHEN I DEPRESSED THE BRAKE PEDAL I FELT NO RESISTANCE AND THERE WAS NO DECELERATION. THE BRAKE EITHER FINALLY APPLIED ITSELF AFTER I GOT THE PEDAL ALMOST TO THE FLOOR OR I LET OFF THE BRAKE AND REAPPLIED THE PEDAL AND IT FUNCTIONED NORMALLY THE SECOND TIME. IT DID NOT RESULT IN ANY ACCIDENTS BUT LEFT ME UNSURE ABOUT THE SAFETY OF THE VEHICLE. *TR
BRAKE MASTER CYLINDER LEAKED FLUID INTO THE BRAKE BOOSTER CAUSING LOSS OF BOOST RESULTING IN EXTREMELY REDUCED BRAKING FUNCTION. *TR
TL* THE CONTACT OWNS A 2009 MAZDA CX-9. THE CONTACT STATED THAT WHILE DRIVING APPROXIMATELY 40 MPH, EXCESSIVE FORCE HAD TO BE APPLIED TO THE BRAKE PEDAL IN ORDER TO BRING THE VEHICLE TO STOP. THE VEHICLE WAS TAKEN TO A PRIVATE MECHANIC WHERE THE CONTACT WAS INFORMED THAT THERE WAS FLUID LEAKING FROM THE MASTER CYLINDER TO THE POWER BOOSTER. THE CONTACT WAS ALSO INFORMED THAT THE POWER BOOSTER NEEDED TO BE REPLACED. THE MANUFACTURER WAS NOT NOTIFIED OF THE FAILURE. THE VEHICLE WAS NOT REPAIRED. THE APPROXIMATE FAILURE AND CURRENT MILEAGE WAS 38,000. *TR
THE LOW BEAM HEADLAMP CONNECTOR ON THE PASSENGER SIDE MELTED INSIDE THE HEADLIGHT CAUSING THE LIGHT TO FAIL. NOW THE DRIVER SIDE HAS DONE THE EXACT SAME THING CAUSING THE LIGHT TO FAIL. THIS COULD CREATE A SERIOUS INJURY AND REQUIRES THE REPLACEMENT OF A DEFECTIVE LIGHT CONNECTOR. *TR
2009 MAZDA CX-9 - ON 5/19/2013 THE BRAKES WERE FINE. THE MORNING OF THE 20TH MY WIFE RETURNED HOME FROM WORK, AND SAID SHE HEARD A HISSING NOISE FROM THE BRAKES. I DROVE THE CAR TO WORK LATER THAT DAY AND NOTICED THE HISSING SOUND. I ALSO NOTICED THAT THE BRAKE PEDAL FELT NORMAL AT FIRST THEN BEGAN TO GET HARD AND THE CAR COULD BARLEY STOP. *TR
TL* THE CONTACT OWNS A 2009 CX-9. THE CONTACT STATED THAT WHILE TRAVELING 40 MPH, THE VEHICLE BEGAN TO SHAKE AND VEER TO THE LEFT ABNORMALLY. THE VEHICLE SHORTLY BEGAN TO OPERATE NORMALLY. THE VEHICLE WAS ABLE TO BE DRIVEN TO THE CONTACT'S RESIDENCE AND WAS LATER TAKEN TO THE DEALER WHERE THE FAILURE COULD NOT BE DUPLICATED. THE VEHICLE WAS NOT REPAIRED. THE MANUFACTURER WAS CONTACTED ABOUT THE ISSUE. THE FAILURE AND CURRENT MILEAGES WERE 56,000.
RE: MAZDA CORPORATE FILE NUMBER [XXX] I WANT TO MAKE A COMPLAINT THAT MAZDA USA AND FREMONT MAZDA DEALER DECLINED A VALID DEFECT REAR LED TAIL LIGHTS WHEN I EXERCISE IT THROUGH MAZDA FACTORY NEW CAR WARRANTY. I HAVE ALREADY CONTACT MAZDA CORPORATE FOR THIS DEFECT PROBLEM AND WORKED THROUGH THE LOCAL MAZDA DEALER (FREMONT MAZDA) TO DIAGNOSE THE PROBLEM. FREMONT MAZDA DISHONESTLY DECLINED THE VALID DEFECT PROBLEM AND WHEN I LATER TRYING TO SHOW THE DEFECT EVIDENCE (PICTURES) TO MAZDA USA, MAZDA USA CORPORATE CHOSE TO IGNORE ME AND CONCURRED WITH THE MAZDA DEALER'S DIAGNOSIS. EACH OF 2009 MAZDA CX-9 LED TAIL LIGHT HAS 12 LED PIXELS. EACH LED TAIL LIGHT HAS A FEW CROOKED LED PIXELS ARE DIM AND AIMED AT THE SKY AND GROUND BUT NOT TO THE TRAFFIC BEHIND. A DRIVER DIRECTLY BEHIND MY CX-9 ONLY CAN SEE ABOUT 2/3 LED PIXELS (8 OUT OF 12) AND THE OTHER LED PIXELS ARE DARK. THE CROOKED LED ARE LIT BUT YOU CAN ONLY SEE THAT DIRECTLY LOOKING DOWN FROM TOP OF THE CAR OR VICE VERSA. I BELIEVE THIS LED TAIL LIGHTS DEFECT IS A VALID SAFETY CONCERN. LED HAS A DISCRETE AND NARROW LIGHT PATTERN COMPARES TO THE INCANDESCENT BULBS. A GOOD SET OF LED TAIL LIGHT SHOULD HAVE ALL ITS PIXELS AIMED TO THE TRAFFIC BEHIND, NOT TO THE SKY AND GROUND. HOWEVER, MAZDA (BOTH THE DEALER AND USA CORPORATE) REFUSED TO TAKE MY CONCERN SERIOUSLY AND REFUSED TO WORK WITH THEIR CONSUMERS. I REASONABLY DOUBT THEY STRATEGICALLY WORK TOGETHER TO REJECT A VALID SAFETY CONCERN THAT MIGHT POTENTIALLY CAUSE MAZDA USA MORE TRO
OWN A 2009 MAZDA CX-9 EQUIPPED WITH BRIDGESTONE DUELER H/L 400, SIZE 245/50/R20. AT 26040 MILES TPMS LOW TIRE PRESSURE INDICATOR LIGHT ILLUMINATED. BEGAN TO UNSCREW VALVE STEM CAP ON PASSENGER SIDE REAR TIRE AND IT CRACKED IN HALF, SENSOR CAME OUT, AND ALL AIR IN TIRE CAME OUT. CONTACTED MAZDA ROADSIDE ASSISTANCE WHICH CAME OUT AND REMOVED FLAT TIRE AND PUT ON SPARE. WAS TOLD BY MAZDA THAT VALVE STEM FIX WAS MY RESPONSIBILITY, TOOK FLAT TIRE TO NEARBY INDEPENDENT SHOP WHERE NEW VALVE STEM WAS INSTALLED WITH SENSOR AT COST OF $135. CONTACTED MAZDA CUSTOMER ASSISTANCE AND WAS TOLD I SHOULD HAVE TAKEN TIRE T MAZDA DEALERSHIP. *TR
THE TACHOMETER OF THE CAR STICKS IN HIGH REVS (1500-2500),ENGINE ON, CAR IN NEUTRAL, FOOT OFF THE GAS PEDAL, IF THE CAR IS MOVING OVER 20-25MPH (EITHER BY FREE FALLING A HILL OR BEING PULLED) THE TACHOMETER VARIES THE RPM READING TO MATCH SPEED JUST AS IF THE CAR WOULD BE IN 'D' POSITION. I THINK THE ECU HAS A GLITCH OF SOME SORT THAT IGNORES THE GAS PEDAL AND THE SHIFT POSITION IF THE CAR IS MOVING. TAKEN TO THE DEALERSHIP AND THEY SAID CAR IS WORKING AS DESIGNED, THAT THE CAR WILL KEEP RPMS TO MATCH SPEED IN TO AVOID A ENGINE SLOWDOWN OR SOMETHING SIMILAR. MY CONCERN IS THAT THE ECU SHOULD BEHAVE AS EXPECTED SO SHOULD THE TACHOMETER READ 600-800 RPM WHEN IDLING, REGARDLESS OF THE SPEED OF THE CAR IF THE TRANSMISSION IS IN NEUTRAL, IF NOT AT ANY TIME THE ECU MAY DECIDE IT SHOULD REV UP THE ENGINE IF THE SPEED SENSOR GOES BAD. *TR
NHTSA publishes every complaint as the owner wrote it and investigates only a fraction. Spelling, capitalisation and judgement are the filer’s own. What carries weight is repetition: the same component failing the same way across many filings, and whether the manufacturer eventually opened a recall for it.
Full record for the 2009 Mazda CX-9 → · Every CX-9 year → · How the figures are calculated →