Lexus RX350 adaptive cruise problems

Filed May 14, 2022 · 1,356 miles · MI · fire

Driving on I80E in Iowa with cruise control set at 70 mph, warning light for AWD failure came on, followed by engine light and all warning lights. Coasted into breakdown lane and had definite loss of power. Became aware of fire by fellow motorist running toward the car with fire extinguisher. Saw black smoke and fire coming from front of car. Forced to evacuate car on interstate, smoke in east and westbound lanes. The car was consumed in about 20 minutes. Insurance company- AAA - has inspected car. Unknown if Lexus has inspected. Remains taken to Teo’s Towing 563‑888‑1988. Please inspect. Air bags did not employ.

Filed Nov 6, 2020 · Brakes · 20,000 miles · VA · crash · 1 injury

While traveling north on interstate 95 in the middle lane at approximately 60mph after switching into left lane saw brake lights ahead and stepped on brake pedal. Heard slight pop sound, brake pedal went immediately to the floor. Car did not stop or slow down. Swerved to left to avoid directly hitting car in front of me but hit jersey wall and the car. My car kept going another couple hundred yards before it finally stopped. Car was totaled.without functioning brakes adaptive cruise control or forward collision braking were useless.

Filed Aug 30, 2019 · Acceleration, Driver assistance · 2,800 miles · CA

Tl* the contact owns a 2019 lexus rx350. While driving with the adaptive cruise control activated and set at 72 MPH, the driver reduced the speed to approximately 60 MPH when switching lanes. After releasing the accelerator pedal, the vehicle continued to accelerate past the set cruise control speed of 72 MPH and continued to accelerate to approximately 80 MPH. After deactivating the cruise control feature, the vehicle continued to accelerate and the rpms increased before the speed eventually was reduced. The cause of the failure was not determined. Lexus escondido (1205 auto park way, escondido, ca) and the manufacturer were notified of the failure. Prior to the failure, the vehicle hesitated while accelerating and was serviced. The same lexus dealer reprogrammed/flashed the transmission, but the failures continued. The failure mileage was 2,800.

Filed Nov 18, 2018 · Transmission · TN

1.constant jerking sensation occurs before vehicle shifts into lower gears while at relatively low speeds and throttle settings (25-45 MPH, stop and go city driving, maintaining speed). 2.when minimal increase in power is needed or a mild grade is encountered, additional throttle pressure seems only to result in loss of power until the transmissions shifts into some lower gear. The vehicle then accelerates too rapidly, followed by the need to reduce throttle pressure ' or apply brakes - which in turn causes the transmission to shift back to a higher gear. The sequence then repeats itself. 3.note: poor drivability issues are reduced when the engine is cold. Also keeping RPM above 2000 helps. 4.depending on driving conditions, the vehicle will accelerate well while shifting up through the gears but seems to loose power as RPM drops, forcing a downshift or increased throttle position. 5.when under slight engine load, the suspension seems to amplify road bumps, to the extent of finding bumps where there are none. This condition is reduced while at idle throttle settings and coasting. 6.a recent drive through the mountains prompted me to resort to manually shifting the transmission to improve drivability because of hills and curves. 7.I frequently resort to driving in s4 except for interstate driving so as to keep RPM above 2000 to improve drivability. 8.frequently the engine feels to be missing, resulting in vibration through steering wheel and accelerator pedal. 9.on four occasions since ownership the rx has suddenly and expectantly accelerated for unknown reasons, forcing emergency breaking. This is an extreme safety issue. 10.when using cruise control (~65 MPH) and if the set speed is reduced a couple of MPH, the RPM jumps to 6,000. 11.transmission slow to choose a gear when accelerating into traffic.

Filed Aug 10, 2018 · Engine, Steering · 103,000 miles · OH

My car never leaked oil, and no sensor lights were on. Regular maintenance was performed on the car. While I was driving on the freeway on cruise control about 70 MPH (2,000 RPM) engine suddenly revved up to 3,000-3,500 RPM. I was able to exit the highway within 0.25 miles, the oil pressure sensor came on at the end of the exit ramp. I drove approximately 100 yards away from the exit ramp to reach a side street and by then the car was barely moving, it was very difficult to turn the steering wheel, and several other sensor lights were also on. I had the car towed to a service garage that told me the oil coolant lines had leaked causing the low pressure condition in the engine. After the technician replaced the oil cooler lines and performed an oil and filter change they found "large quantities of metal shavings in oil filter cartridge indicating internal damage of engine." severe internal engine damage has occurred and engine needs to be replaced. In my experience, it seems that a large quantity of oil was lost very quickly, and if I had not been able to exit the highway within a matter of seconds the car could have seized up and I could have gotten in an accident.

Filed Mar 12, 2017 · Acceleration · 10,000 miles · FL

When using all of lane keep assist, lane center, and cruise control, the vehicle steers sharply to the right and will pull out of the existing lane into the lane to the right. Most noticeable at speeds above 40mph. Problem has happened since the vehicle was new, but seems more pronounced because I do more highway driving now with cruise control. Dealer and factory reps consider this behavior normal, yet a loaner car of the same model did not exhibit this symptom.

Filed Jun 23, 2016 · Acceleration · 5,600 miles · CA

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!

Filed Mar 11, 2013 · Acceleration, Brakes · 5,665 miles · AL · crash · 1 injury

I was driving on I-59 north with wife as passenger with radar cruise control set at 70 MPH approaching departure exit. I tapped the brake pedal to release the cc and it did not release. Thinking I had not tapped it hard enough, I made the turn and tapped the brake pedal harder. The cc did not release. I applied the brakes with full force. The engine raced to satisfy the cc and the speed was 69 MPH going into the exit. My focus was steering the vehicle to avoid objects and traffic. We crashed across a four lane concrete curbed boulevard and into a chain-link fence. I steered down a frontage road and brought the vehicle to a stop. This was a 30 second + event. The black box captured 9.5 seconds of information. Lexus downloaded the black box and I requested a copy of the information which they did furnish on a thumb drive. They immediately erased all evidence of the crash from the vehicle data recorder and proclaimed there were no problems with the vehicle. The thumb drive data clearly displays that the car was traveling 69 MPH on the data recorder. It also shows that the cc dropped out during the crash. I received a letter from toyota legal in torrance, ca, indicating that their review of the vehicle found nothing wrong with it and the case was closed. The body shop repairs were $16k plus the depreciated value of the vehicle is $11k. Nalley lexus galleria, smyrna, ga, where the vehicle was purchased, defers all communications to toyota. I have been a toyota customer since 1990 and this has been my third lexus rx. Bitter sweet end! Mb

Filed Jan 9, 2012 · Acceleration · 355 miles · IA

When I set the cruise control while driving the display on the dash indicating mpg, current mpg, average speed, etc. Goes bland. The dealer said he cannot fix this problem as there appears to be a "bug" in the electronics.

Filed Jun 22, 2011 · Acceleration · 9,500 miles · KY · fire

Tl* the contact owns a 2010 lexus rx350. The contact stated while driving 70 MPH with the cruise control engaged the vehicle suddenly accelerated up to 80 MPH. While the vehicle was accelerating the brake malfunction light came on. The contact shifted the vehicle into neutral and chose the power button in order to shut the vehicle off and drove onto the emergency lane. The contact stated the brakes were also smoking although nothing was stuck underneath the accelerator pedal. The contact stated the lexus help service center was not available at the time of the acceleration. The contact called the dealer but the service department was closed. The contact called the manufacturer regarding the sudden acceleration and they authorized that the vehicle to be towed to a dealer. The dealer stated to the contact, the accelerator pedal was stuck on the floor but the contact stated the floor mat was not stuck. The vehicle was currently under going test with the dealer. The failure mileage was 9,500.