Service Brakes. Review the 13 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →
Structure. Review the 10 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →
Electrical System. Review the 9 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →

NHTSA owner reports · September 18, 2026 snapshot.

1 crash reports1 fire reports1 injury reports

Service Brakes complaints

13 reports

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Mileage unknown · Apr 20, 2026

Service Brakes

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I am reporting a serious and potentially dangerous braking issue with my 2007 Lexus RX400h. The vehicle currently has approximately 126,296 miles. While driving, the vehicle emits a continuous and intermittent warning beeping sound. At the same time, the braking system becomes unreliable. The brake pedal becomes extremely difficult to press, requiring excessive force, and the vehicle does not respond consistently when braking. In addition, there are instances where the vehicle appears to brake unpredictably or inconsistently, which creates a significant safety hazard for myself, passengers, and other drivers on the road. Based on my research, this issue appears to be related to a known defect involving the ABS brake actuator assembly. Lexus previously issued a warranty enhancement program for this component due to internal malfunctions that affect brake pressure and system performance. However, this issue was not issued as a formal recall tied to VIN eligibility. Despite my vehicle being under 150,000 miles, I have been informed that I may be outside the time-based warranty window, and no active recall is listed for my VIN. This defect directly impacts the braking system, which is a critical safety component. Failures in the brake actuator can lead to improper brake pressure, reduced stopping ability, and increased risk of a crash. Given the safety implications and known history of this defect, I believe this issue warrants further investigation and potential recall consideration. I am submitting this complaint to request that the NHTSA review this matter for safety risk and determine whether broader action is necessary to protect consumers.

NHTSA ODI #11732484

Mileage unknown · Dec 20, 2024

Service Brakes

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Hydraulic brake booster pump abs actuator has been on a service bulletin around 2015 with a definitive timetable. I have had numerous notifications with warning lights that are indicative of the booster pump failure for more than 10 years and every time I bring it to the Lexus dealer they said it is my battery. They replace the battery and reset the computer and it repeats itself over and over. My main concern as this should have been a recall and not a service bulletin; an abs brake failure is a significant defect with possible fatal outcome. The problem has been well documented with numerous Lexus and Toyota customers hybrid vehicles going back to 2005. My vehicle is 2007 Lexus RX 400h with 78,000 miles. I am afraid to drive the vehicle with the issue unresolved.

NHTSA ODI #11631833

Mileage unknown · Aug 13, 2022

Electrical SystemService BrakesSteering

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Electrical system malfunction began (to my best calculation & recollection) in summer 2021 with the first of four battery malfunctions in one year. Each time, AAA discovered low battery response and recommended battery replacement. This time around, battery was replaced about two weeks prior, due to battery failure/AAA reporting would not accept charge. THE NEW BATTERY FAILED (8/3) and the starter broke while attempting to charge. Mechanic repaired starter and battery accepted the charge. No problem, right? Wrong. This driver drove about 30 miles and while driving, the electrical system shut down altogether. With I believe ALL WARNING LIGHTS LIGHTING UP, extremely dangerous situation. NO BREAKING, NO STEERING, NO WARNING. Fortunately, it occurred in a suburban residential area as opposed to the highway. SECOND tow to my mechanic and now, after a full week, no diagnosis, though the car has been running in the shop. This is an intermittent problem. I suspect the alternator.

NHTSA ODI #11479110

Mileage unknown · Nov 8, 2021

Service Brakes

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Toyota and Lexus are aware of the fact that what is called break actuator assembly, part number 44050-48191 (for Toyota Highlander Hybrid 2006-2007, and new part number for Lexus RX400h 2006-2007) and 44510-48060 (old/original part number for RX400h 2006-2007) are faulty resulting in the break system failing creating an extremely dangerous situation. Toyota extended the warranty for the part, but this extended warranty does not cover all vehicles, as it is not a recall. (The extended warranty has a maximum 150K miles or 10years clause but this is beyond the point regardless.) The part and repair costs more then $3000 at a Toyota/Lexus dealer. Toyota/Lexus is not offering a recall to avoid paying for the large number of cars out there with this well known issue which essentially renders the cars not drivable, unless the owner pays out of pocket what is close to half the current value of the car, for a defective item that is failing consistently in all these cars. Toyota/Lexus should recall the part, rather than just offering an extended warranty. This is a very well known problem, for which people have complained (including in NHTSA) for years, which forced Toyota/Lexus extend the warranty, but this is not enough as it does not cover all vehicles that it should cover.

NHTSA ODI #11439802

Mileage unknown · Oct 5, 2021

Service Brakes

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2007 lexus rx400h,,,couple week ago ,,,my sister drive this car on the highway,,,suddenly the check engine, ABS, traction control, VSE, ect light come on and the vehicle when brake will pull to right also brake grab immediately. Bring to the tech and get a code C1391 abnormal leak in accumulator,,,that mean replace the whole ABS unit assembly Bring to Lexus dealer on 9-30-2021 and still get the same code C1391 and pay $175.93 for diagnostic and cost repair $3,573 (This condition may be caused by a small internal brake fluid leak inside the brake actuator) Call lexus head quarter and turn out this is only basic warranty,,,,,no recall for safety,,,, because no one dead yet Research online turn out a lot of problem about this: (2006 - 2007 GS 430) (2007 - 2011 GS450H) (2008-2011 GS 460) (2006-2008 RX400H) (2007-2013 LS460) This only Lexus,,,,more about Toyota But LEXUS still ignore about this safy

NHTSA ODI #11435552

Mileage unknown · Jun 21, 2021

Service Brakes

Brake actuator failure reported by dealer because booster pump is running frequently. No info from Toyota and Toyota declined repair . Dealer indicates my vehicle is not under extended warranty. 117000 miles on my car.

NHTSA ODI #11421754

Mileage unknown · Jun 20, 2021

Service Brakes

Brake actuator failed at 117000 miles. Verified by dealer and suggest replace brake actuator and pump assembly. No notification ever

NHTSA ODI #11421580

94,853 miles · Mar 4, 2021

Service Brakes

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CAR HAS BEEN MAKING A CLICKING NOISE DURING STOPS FOR A YEAR. I CHALKED IT UP TO SOMETHING UNIMPORTANT. ON 2/20/21, THE 'CHECK AVS,' 'CHECK ABS,' AND 'CHECK BRAKE SYSTEM' LIGHTS ALL CAME ON, AND CAR LURCHED WHILE BACKING OUT OF MY DRIVEWAY. I WAS DRIVING MY WIFE AND DAUGHTER AT THE TIME. BROUGHT LEXUS TO MY LOCAL MECHANIC ON 2/22/21. AFTER SEVERAL DAYS, MECHANIC RETURNED THE CAR TO ME, SAYING HE COULD HEAR THE CLICKING AND, ACCORDING TO HIS RESEARCH, IT COULD BE THE BRAKE ACTUATOR GIVEN LEXUS HAD DONE A WARRANTY EXTENSION ON THIS PART IN 2016. HE TOLD ME THIS REPAIR WOULD COST IN THE THOUSANDS OF DOLLARS, AND ADVISED ME TO CONTACT LEXUS. SPOKE WITH LEXUS BRAND MANAGER ON 2/25 WHO TOLD ME ABOUT WARRANTY EXTENSION ZLG FOR ACTUATORS IN 2016, AND TOLD ME THAT IN ORDER FOR LEXUS TO ASCERTAIN WHETHER OR NOT THE CAR WAS EXPERIENCING AN ACTUATOR FAILURE, IT MUST BE INSPECTED BY A LEXUS SERVICE CENTER. BECAUSE I WAS TOLD ABOUT THE SPECIFIC EXTENSION AND ASKED TO TAKE IT TO LEXUS TO DIAGNOSE THE ISSUE, I ASSUMED LEXUS WOULD COVER THE REPAIR COST. I TOOK THE CAR TO LEXUS SANTA MONICA ON 3/2/21 AND WAS NOTIFIED THAT THE PROBLEM WAS RELATED TO THE BRAKE ACTUATOR, AND THAT THE COST TO REPAIR WOULD BE $3000 PLUS TAX. I RELAYED TO LEXUS SM WHAT I WAS TOLD BY LEXUS CORPORATE, AND LEXUS SM TOLD ME THEY WOULD CALL LEXUS CORPORATE AND SEE WHAT THEY HAD TO SAY ABOUT WARRANTY EXTENSION 'ZLG.' ULTIMATELY, LEXUS WOULD NOT COVER COST BECAUSE THE PART WAS OUTSIDE THE EXTENDED WARRANTY. I SPOKE WITH ANOTHER LEXUS CASE MANAGER ABOUT WHY A WARRANTY EXTENSION WAS OFFERED AS OPPOSED TO A RECALL, AND HE SAID I SHOULD LODGE A COMPLAINT WITH NHTSA. I ALSO SPOKE WITH HIS SUPERVISOR, WHO SAID LEXUS WOULD NEVER PAY FOR A PART OUTSIDE A WARRANTY, EVEN A FAULTY PART GIVEN AN EXTENDED WARRANTY. NOBODY IN THE LEXUS CHAIN OF COMMAND CAN TELL ME IF THE CAR IS SAFE TO DRIVE. I WILL SUPPORT CLASS ACTION SUIT.

NHTSA ODI #11399164

204,800 miles · Dec 20, 2020

Service BrakesCrashInjury

BRAKE ACTUATOR FAILURE HAS BEEN ADDED TO A BULLETIN FOR EXTENDED WARRANTY AND NOT A RECALL. THIS IS A COSTLY MALFUNCTION THAT TOYOTA IS AWARE OF AND THEY SHOULD TAKE CARE OF ALL VEHICLES AS NOT TO COMPROMISE BRAKING AND ACCIDENT AVOIDANCE.

NHTSA ODI #11384314

169,000 miles · Oct 2, 2020

Electrical SystemService BrakesUnknown Or Other

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"CHECK VSC" SYSTEM WITH ACCOMPANYING CONTINUOUS BEEP NOISE, BRAKES BECOME HARD TO PUSH/ACTIVATE. THIS STARTED A FEW WEEKS AGO, AND WOULD HAPPEN INTERMITTENTLY, AND PROGRESSIVELY LONGER IN THE DYSFUNCTIONAL BRAKES PHASE. I HAD AN EMPLOYEE AT AUTO ZONE CLEAR THE CODE 2 DAYS AGO, BUT THE PROBLEM STARTED AGAIN, INTERMITTENTLY UPON VEHICLE START, BUT WOULD GO AWAY SHORTLY, WITH NORMALLY RESPONSIVE BRAKES. THIS INTERMITTENT ISSUE OCCURS WHEN I AM DRIVING, THEREFORE THIS IS A SERIOUS ROAD HAZARD AS MY BRAKES BECOME SIGNIFICANTLY LESS RESPONSIVE WHEN THE PROBLEM OCCURS. IN OTHER WORDS, THIS OCCURS WHEN STATIONARY AND WHEN DRIVING, INTERMITTENTLY.

NHTSA ODI #11362458

Official recalls

No recalls in this snapshot.

Model-level recall history does not show whether a particular VIN is affected or has received a repair. Check a VIN with NHTSA ↗

NHTSA investigations

RQ10003 · Unintended And Uncontrolled Acceleration

Opened Feb 16, 2010 · Closed Mar 1, 2011

Status: closed (inferred from source dates) · Electrical System:software; Vehicle Speed Control:accelerator Pedal

On February 16, 2010, NHTSA's Office of Defects Investigation (ODI) opened RQ10-003 to determine whether the scope of prior Toyota recalls relating to potential unintended acceleration were sufficiently broad, including, among others, Toyota recalls 07E-082, 09V-388, 10V-017, and 10V-023.NHTSA also requested information regarding potential electronic causes of unintended acceleration in Toyota and Lexus vehicles.I. Pedal Interference from Floor mats, Carpet Covers and Plastic Pads in Carpets.During the RQ10-003 investigation, ODI reviewed a large volume of documents to assess whether additional vehicles should be recalled.Following the agency's analysis, NHTSA requested that Toyota recall additional vehicles.Toyota complied with the agency's request.The details of these recalls are set forth more fully in Toyota's reports to NHTSA pursuant to 49 CFR Part 573.These recalls are as follows:Recall 11V-112: (1) model year (MY) 2004-2006 Toyota Highlander and Highlander Hybrid; and, (2) MY 2004-2007 Lexus RX330,RX350, and RX400h (hybrid model). The total estimated population under this recall is 769,379 vehicles.This recall remedies potential accelerator pedal entrapment caused by a loose floor carpet cover (trim panel). Recall 11V-113: (1) MY 2003-2009 through 2009 Toyota 4Runner; (2) MY 2006-2010 Toyota RAV4; and, (3) MY 2008-2011 Lexus LX570.The total estimated population under this recall is 1,381,000 vehicles.This recall supplements recall 09V-388 and remedies potential accelerator pedal entrapment by an unsecured floor mat.Recall 11V-115: (1) MY 2006-2007 Lexus GS300 (all wheel drive vehicles); and, (2) MY 2006-2007 Lexus GS350 (all wheel drive vehicles). The total estimated population under this recall is 19,647 vehicles.This recall remedies potential accelerator pedal entrapment caused by inadequate clearance between the pedal linkage and a plastic pad embedded in the vehicle's carpet.II. Potential Electronic Causes of Unintended Acceleration.After NHTSA opened RQ10-003, NHTSA launched a ten-month study of potential electronic causes of unintended acceleration in Toyota vehicles.NHTSA launched the study in the spring of 2010 in light of concerns aired in Congressional hearings.NHTSA enlisted engineers at the National Aeronautics and Space Administration (NASA) with expertise in areas such as computer controlled electronic systems, electromagnetic interference and software integrity to assess whether electronic systems or electromagnetic interference played a role in incidents of unintended acceleration in Toyota vehicles.That study has concluded.Two reports are associated with the study and are available on NHTSA's website.NASA's report is entitled Technical Support to the National Highway Traffic Safety Administration (NHTSA) on the Reported Toyota Motor Corporation (TMC) Unintended Acceleration (UA) Investigation, NESC Assessment No. TI-10-00618 (Jan. 18, 2011).NHTSA's report is entitled Technical Assessment of Toyota Electronic Throttle Control (ETC) Systems (Feb. 2011).Both reports should be read in conjunction with each other. As stated in its report, NASA did not find an electronic cause of large throttle openings that can result in unintended acceleration incidents. NHTSA did not find a vehicle-based cause of unintended acceleration incidents other than the physical pedal interference causes that are being addressed by Toyota's recalls. This RQ is closed.

Additional source detail variants (6)

Electrical System:software

Vehicle Speed Control:accelerator Pedal