There are 6 owner-reported powertrain & transmission complaints for the 2009 Nissan Pathfinderin NHTSA's database. These are unverified consumer reports and may not reflect confirmed defects.
THE VEHICLE JUST STOP. HAD TOW TO THE MECHANIC DIAGNOSED WITH COOLENT IN THAT DAMAGED THE TRANSMISSION
I WAS DRIVING TO WORK WHEN MY TRANSMISSION FAILED. THERE WAS NO WARNING. I WAS DRIVING ABOUT 60MPH, AND HAD TO MERGE TO THE SIDE OF THE ROAD. I HAD TO GET IT TOWED, AND IT WAS DETERMINED THE RADIATOR FAILED, CAUSING RADIATOR FLUID TO GET INTO THE TRANSMISSION. THIS RUINED THE TRANSMISSION. COST IS ABOUT $4,000 TO REPLACE, AND THIRD PARTY WARRANTY IS REFUSING TO COVER ANY OF IT.
MY 2009 NISSAN PATHFINDER (AFTER THE WARRANTY RAN OUT), STARTED HAVING ISSUES WITH THE TRANSMISSION AND OVERHEATING. LO AND BEHOLD WE HAVE AN ISSUE WHERE THE RADIATOR AND TRANSMISSION FLUID IS MIXING. THIS APPEARS TO BE THE SAME PROBLEM OTHERS HAVE REPORTED AS A FAILED TRANSMISSION FLUID COOLER INTEGRATED IN THE RADIATOR THAT ALLOWED ENGINE COOLANT TO MIX WITH AND CONTAMINATE THE AUTOMATIC TRANSMISSION FLUID. THERE WERE NO WARNING SIGNS LEADING UP TO THE FAILURES OTHER THAN A SUDDEN JOLT OF THE VEHICLE LIKE THE TRANSMISSION WAS SLIPPING. THIS ALWAYS HAPPENS WHILE THE VEHICLE IS MOVING AT SLOW AND HIGH SPEEDS.
TL* THE CONTACT OWNS A 2009 NISSAN PATHFINDER. THE CONTACT STATED THAT THE VEHICLE WAS AT STAND STILL AT A PARKING LOT, WHEN ENTERING THE VEHICLE, IT BEGAN TO MOVE FORWARD WHILE THE GEAR WAS IN PARK. THE CONTACT STATED SHE DEPRESSED THE BRAKE PEDAL TO STOP THE VEHICLE. THE CONTACT STATED SHE INJURED HER LEG WHILE ENTERING THE VEHICLE. THE CONTACT DID NOT SEEK ANY MEDICAL ATTENTION. THE CONTACT STATED THAT SHE WAS UNABLE TO START THE VEHICLE. THE VEHICLE WAS TOWED TO AN INDEPENDENT MECHANIC HOWEVER, HE ADVISED THE CONTACT HE COULD NOT DO ANYTHING WITH THE VEHICLE. THE CONTACT CALLED LOCAL DEALER BAYOU NISSAN (13050 I-10 SERVICE RD, NEW ORLEANS, LA 70128, (504) 245-5900) AND SCHEDULED A DIAGNOSTIC APPOINTMENT. THE MANUFACTURER HAD NOT BEEN INFORMED OF THE FAILURE. THE FAILURE MILEAGE WAS 11,300. *DT*DT VEHICLE REPAIRED*JB
WHEN DRIVING UPHILL ON LONG MOUNTAIN ROADS AND SHIFTING THE AUTOMATIC TRANSMISSION DOWN TO 2, 3 OR 4, THE CAR WON'T STAY IN GEAR. AFTER A FEW MINUTES OF DRIVING IT WILL SHIFT BY ITSELF INTO 5 WITHOUT ALLOWING YOU TO SHIFT DOWN AGAIN. YOU CAN ONLY GO INTO D OR STOP AND SHUT DOWN THE ENGINE. THE TRANSMISSION SHOP ALREADY REPLACED THE SHIFTING ASSEMBLY, INSPECTED THE ENTIRE TRANSMISSION & WIRES FROM THE COMPUTER. NO PROBLEM COULD BE IDENTIFIED BUT THE ISSUE REMAINS. THE CAR WILL STAY IN LOWER GEARS WHEN DRIVING DOWNHILL. IT'S A MYSTERY AND VERY EXPENSIVE TO DIAGNOSE FURTHER. DO YOU HAVE ANY IDEAS? THE LOCAL NISSAN DEALER IS UNABLE TO HELP. THEY WORKED ON THE COMPUTER AND MAIN CIRCUIT BOARDS ABOUT 5 YRS AGO ' COULD THE HAVE POSSIBLY CAUSED THIS PROBLEM? ANY HELP WOULD BE APPRECIATED.
THE DEFECT IN THE RADIATOR CAUSED THE ANTIFREEZE AND OIL TO MIX. IT THEN MIXED WITH THE TRANSMISSION FLUID. THAT WAS FIXED BY A REPAIR SHOP. NOW THE TRANSMISSION HAS SLIPPED OUT BECAUSE OF THE MIXTURE OF THE THREE FLUIDS. *TR
Complaints are unverified consumer reports submitted to NHTSA. A high complaint count may reflect vehicle popularity, not defect severity. Data sourced from NHTSA public records.
Data synced from NHTSA on Apr 25, 2026