2011 Mazda CX-9 Driver assistance Problems

The contact owns a 2011 Mazda CX-9. The contact stated that while attempting to park the vehicle at a slow speed in the driveway, the vehicle suddenly experienced unintended acceleration, lurched forward, and crashed into a tree before coming to a stop. The contact was unable to stop the vehicle during the sudden unintended acceleration. During the failure the vehicle sustained front end damages, but no air bags had deployed. No injuries were reported. The cause of the failure was not yet determined. The contact stated that twice in the day before the unintended acceleration, the vehicle jerked forward in traffic however, the contact attributed the issue to the brake pedal not being firmly depressed or the clutch not properly engaged while shifting gear. The local dealer was notified of the failure, but no assistance was offered. The manufacturer was not yet contacted. The failure mileage was 173,000.

NHTSA ID

11677734

Incident

Jul 28, 2025

Mileage

173,000 mi

OUR VEHICLE HAS WATER DRAINS OR "WEEP" LINES FOR THE SUNROOF. WE RECENTLY HAD THE ELECTRICAL SYSTEM STOP/START, DASH LIGHTS REMAIN ON CONSTANTLY AFTER SITTING IN THE DRIVEWAY DURING THE RAIN. WE LEARNED THAT IF THE DRAINS BECOME BLOCKED THAT WATER LEAKS INTO THE CABIN DIRECTLY ONTO THE BODY CONTROL MODULE (BCM). BECAUSE THE BCM IS NOT IN A SEALED OR WATER-PROOF CASE, YET IS SOAKED IN THESE CONDITIONS, THE VEHICLE IS SUBJECT TO ELECTRICAL FAILURE AS A RESULT. REPLACING THE BCM COSTS ABOUT $1,000. WHEN WE STARTED THE CAR THE DASH LIGHTS THAT WARN OF AN ISSUE WITH MANY OF THE VEHICLES SAFETY SYSTEMS REMAINED ON. OTHERS WENT OFF AND SOFT OF FLASHED. WE COULD NOT DETERMINE IF THERE WAS REALLY AN ISSUE WITH ALL OF THE COMPONENTS FLASHING ON THE DASH SO WE DID NOT WANT TO DRIVE IT FOR FEAR OF AN ACCIDENT. OUR VEHICLE WAS STATIONARY (THANK GOD). WE WAITED FOR A WHILE AND WERE ABLE TO LEAVE FOR HOME, BUT THIS CONDITION IS CLEARLY A HUGE SAFETY RISK.

NHTSA ID

11165496

Incident

Dec 31, 2018

Mileage

110,000 mi

CAR SURGES UNEXPECTEDLY EVEN WHEN GAS PEDAL NOT ENGAGED - CAN CAUSE A RUSHED FORWARD OR REVERSE MOTION, PUTTING PEDESTRIANS OR OTHER CARS AT RISK. THIS HAPPENS DAILY. PROBLEM WAS IDENTIFIED BY DEALERSHIP SEVERAL MONTHS AGO. THERE IS A RELATED OIL LEAK.

NHTSA ID

11093569

Incident

May 13, 2018

Mileage

69,000 mi

HAD A PROBLEM A FEW YEARS AGO RELATED TO THE TRACTION CONTROL SYSTEM AS INDICATED BY THE WARNING LIGHT APPEARING ON THE DASH. DEALER CONTACTED THE WARRANTY DEPARTMENT TO FILE A CLAIM AND SAID THAT IS WOULD NOT BE COVERED UNDER WARRANTY BECAUSE THEY FELT IT WAS DUE TO DIRT AND NOT A FAULTY SENSOR. THE DEALER NEVER CONFIRMED ONE OR THE OTHER. SECOND ISSUE IS RELATED TO A HISSING NOISE COMING FROM THE BREAK PEDDLE. RESEARCH SUGGESTED MAZDA WAS INVESTIGATED BY NHTSA BACK IN 2014 AND INSTEAD OF A RECALL, MAZDA ISSUED AND EXTENDED WARRANTY FOR 7 YEARS OR 90K MILES. UNFORTUNATELY MY VEHICLE IS WITHIN THE 7 YEARS BUT NOT THE 90K. I AM CURRENTLY AT 97K MILES. STILL WAITING TO SEE IF MAZDA WILL COVER THE REPAIR OR AT LEAST DISCOUNT IT.

NHTSA ID

10991513

Incident

May 24, 2017

I TOOK MY CAR TO HALL IN BROOKFIELD WI TO FIX A RECALL ISSUE. THE DEALER TOLD ME THEY FIXED THE RECALL ISSUE BUT NOTICED ANOTHER PROBLEM THAT REQUIRES THE REPLACEMENT OF THE DIFFERENTIAL BUSHINGS BECAUSE THEY WERE TORN. THEY CHARGED ME OVER $500 FOR THIS ISSUE AND I BELIEVE THE ISSUE WAS EXASPERATED BY THE RECALL ISSUE AND I AM NOT SURE WHY I HAD TO PAY. I HONESTLY BELIEVE IT WAS A WAY FOR THE DEALER TO CHARGE ME FOR THE RECALL WORK BECAUSE IT WAS SUPPOSED TO BE FREE. I AM ATTACHING RECEIPTS FOR THE WORK HALL DID TO THIS COMPLAINT. NOW MY CAR IS HAVING ISSUES WITH PROPERLY ACCELERATING AND IS VERY LOUD.

NHTSA ID

10884039

Incident

May 16, 2016

TL* THE CONTACT OWNS A 2011 MAZDA CX-9. THE CONTACT STATED THAT WHILE STOPPED AT A STOP LIGHT, THE ACCELERATOR PEDAL WAS DEPRESSED BUT THE VEHICLE FAILED TO ACCELERATE AS THE WARNING INDICATORS FLASHED AND THE ENGINE STALLED WITHOUT WARNING. THE VEHICLE WAS TAKEN TO A DEALER WHERE IT WAS NOT DIAGNOSED OR REPAIRED. THE MANUFACTURER WAS NOT MADE AWARE OF THE FAILURE. THE FAILURE MILEAGE WAS APPROXIMATELY 66,727. UPDATED 06/15/16*LJ THE CONSUMER STATED SHE ACCELERATED FROM A STOP LIGHT, AS SHE TURNED THE CORNER. SHE THEN REALIZED, SHE COULD NOT BRAKE, OR STEER THE VEHICLE. SHE HIT THE EMERGENCY BRAKE AND TURNED THE VEHICLE OFF. THE DEALER BELIEVED IT WAS A VACUUM PROBLEM AS SHE BRAKED SLIGHTLY WHEN SHE TURNED THE CORNED. UPDATED 06/16/16.*JB

NHTSA ID

10810700

Incident

Dec 16, 2015

Mileage

66,727 mi

ON 24 JULY 2015, WHILE DRIVING HOME FROM WORK, THE DRIVER IN FRONT OF ME EXECUTED AN EMERGENCY BRAKING TO AVOID A COLLISION WHICH CAUSED ME TO DO THE SAME. FROM THE MOMENT I TRIED TO ACTUATE THE BRAKE PEDAL, IT FELT AS IF THE PEDAL WAS IN THE FLOOR AND IMMOVABLE. LITTLE, IF ANY, BRAKE FORCE WAS APPLIED AND REQUIRED BOTH FEET WITH ALL THE POWER OF MY LEGS TO GET EVEN A SMALL AMOUNT OF BRAKING. I HAD TO IMMEDIATELY DIVE INTO THE MEDIAN AT SPEEDS OF 60-65 MPH TO AVOID HITTING THE CAR IN FRONT OF ME. THIS CAUSED TWO TIRES TO HAVE TO BE REPLACED. WHEN I LEFT MY PARKING GARAGE AND ALL THE WAY TO THE FREEWAY, BRAKING WAS NORMAL. NO DASH LIGHTS WERE ACTIVE NOR ARE THEY NOW. THE ISSUE PERSISTS NOW AND DRIVING THE VEHICLE IS NOT AN OPTION.

NHTSA ID

10743515

Incident

Jul 24, 2015

Mileage

72,246 mi

I HAVE NOT HAD A ACCIDENT YET, HOWEVER SINCE I PURCHASED THE CAR NEW I HAVE HAD TROUBLE WITH THE FRONT BRAKES, ESPECIALLY THE RIGHT WHEEL. THE DEALER SAY THERE IS NOTHING WRONG AND I HAVE COMPLAINED ABOUT THIS ISSUE SEVERAL TIMES AT REGULAR SERVICE. I KNOW SOMETHING IS WRONG, THE PEDAL FADES AND THERE IS A GRINDING AND SOMETIMES HISSING NOISE FROM THE FRONT RIGHT. IT NEEDS TO BE CORRECTED BY THE DEALER BEFORE SOMETHING REALLY BAD HAPPENS. *TR

NHTSA ID

10564380

Incident

Feb 14, 2014

Mileage

27,140 mi