There are 5 owner-reported speed control & cruise complaints for the 2015 Lexus RXin NHTSA's database. These are unverified consumer reports and may not reflect confirmed defects.
TL* THE CONTACT OWNS A 2015 LEXUS RX350. WHEN STOPPED ON A SLIGHT INCLINE, THE VEHICLE HESITATED FOR A SECOND OR TWO WITHOUT WARNING. THE CONTACT CALLED HERB CHAMBERS LEXUS OF HINGHAM (141 DERBY ST, HINGHAM, MA 02043, 781-210-5200) AND THE TECHNICIAN EXPLAINED THAT THE VEHICLE HAD A COMPUTER SYSTEM THAT TRACKED THE VARIOUS DRIVING SPEED PATTERNS AND ADJUSTED THE SPEED CONTROL ACCORDING TO THE DRIVER'S DRIVING HABIT. THE TECHNICIAN INFORMED THE CONTACT TO USE THE SPORT MODE OR TO DEPRESS THE BRAKE PEDAL MORE AT AN INCLINE UNTIL THE VEHICLE WAS READY TO MOVE. THE FAILURE RECURRED APPROXIMATELY THREE TIMES. THE MANUFACTURER WAS MADE AWARE OF THE FAILURES AND TOOK INFORMATION FROM THE CONTACT WITHOUT OFFERING ANY TECHNICAL ADVICE. THE FAILURE WAS NOT REMEDIED. THE FAILURE MILEAGE WAS APPROXIMATELY 17,500.
THE COLLISION PROTECTION SYSTEM GOT ACTIVATED BY ITSELF WHILE DRIVING AT CRETIN LOCATION ON CRETIN ROADS CAUSING SELF HARD BREAKING AND THE SEAT BELT GOT FULL TIGHTENED , IF CAR BEHIND ME , THAT WELL END TO BAD CRASH FOR SURE ONE OF THE LOCATION WHERE THAT ALWAYS HAPPENS WHEN PASSING THREW ( REGARDLESS THE SINGLE MENTIONED DATE) IS ON DIFFIDENCE HWY , ANNAPOLIS MD 21401 (ONE MILE AFTER CROSSING CROWNSVILLE RD HEEDING WEST ) I CALLED LEXUS MAIN OFFICE , THEY SAID THEY DO NOT HAVE RECALL ON THIS MODEL AND WAS ADVISED TO VISIT A LEXUS DEALER , I VISITED LEXUS OF RICHMOND VIRGINIA , THEY CHECKED THE CAR AND THEY SAID THAT NOTHING WRONG FOUND ,
TL* THE CONTACT CALLED ON BEHALF OF HIS SPOUSE WHO OWNS A 2015 LEXUS RX350. WHILE ATTEMPTING TO PARK THE VEHICLE, IT ACCELERATED INDEPENDENTLY AND CRASHED INTO A LIGHT POLE AND TWO PARKED VEHICLES. THERE WERE NO INJURIES SUSTAINED. A POLICE REPORT WAS FILED. THE VEHICLE WAS NOT TAKEN TO BE DIAGNOSED OR REPAIRED. A DEALER WAS NOT CONTACTED. THE MANUFACTURER WAS NOTIFIED OF THE FAILURE. THE APPROXIMATE FAILURE MILEAGE WAS 38,000.
DYNAMIC SPEED CONTROL RANDOMLY (TWICE) HAS LOST SETTINGS & CONTROL. SETTING IT AT 60, CAR INCREASED SPEED TO 85, AND IGNORED CAR IN FRONT OF ME, ALMOST CAUSING A CRASH. LEXUS HAS NOT FOLLOWED UP WITH ME ON THIS. VOICE RECOGNITION OFTEN FUNCTIONS INCORRECTLY RESULTING IN DISTRACTED DRIVING, AND HAS ALMOST RESULTED IN ME DRIVING OUT OF MY LANE OR OFF THE ROAD SEVERAL TIMES. EXAMPLE: ASK IT FOR DIRECTIONS TO PALO ALTO MEDICAL FOUNDATION: RESULT; GIVES ME A LIST OF SOUTH AMERICAN RESTAURANTS. CONTACTED LEXUS ABOUT THIS. ONLY RESPONSE - TAKE IT TO A DEALER. I HAVE AN APPT WITH ONE JULY 11. NO DOCUMENTATION AVAILABLE. SELF REPAIR ATTEMPTS: DISCONNECTED THE CAR BATTERY FOR 30 SECONDS TO RESET THE SYSTEM AND REPROGRAMMED ALL SETTINGS AVAILABLE. RESULT: NO CHANGE. SUMMARY: WITH REGARD TO THE CRUISE CONTROL; SOMEONE COULD GET KILLED FROM THIS!
TL* THE CONTACT OWNS A 2015 LEXUS RX350. THE CONTACT STATED THAT WHILE DRIVING AT VARIOUS SPEEDS, THE VEHICLE WOULD HESITATE TO ACCELERATE WHEN PRESSING THE ACCELERATOR PEDAL AND ON SEVERAL OCCASIONS THE ODOR OF FUEL WAS PRESENT INSIDE THE VEHICLE. THE VEHICLE WAS TAKEN TO THE LOCAL DEALER LEXUS OF CHATTANOOGA (5800 LEE HWY CHATTANOOGA TN) HOWEVER THE MECHANIC WAS UNABLE TO DUPLICATE THE FAILURE. THE MANUFACTURER WAS NOT NOTIFIED OF THE FAILURE. THE FAILURE MILEAGE WAS 3,000.
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 26, 2026