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2004-2008 · 5 model years

Lexus RX400H Problems by year

Owners have filed 459 complaints about the Lexus RX400H across 5 model years, and it has 5 recalls. The 2006 has the most complaints once its age is allowed for (186), while 2005 has far fewer than a typical year. The most reported problem area is the brakes, followed by the electrical system.

Most complaints for its age2006186 complaints · 5 recallsSee the 2006
Complaints
459
Recalls
5
Crashes
51
Fires
6
Injuries
25
Deaths
0

RX400H complaints by model year

Highlighted: the year with the most complaints for its age. Older vehicles have had more time to collect complaints - the Safety Index grade allows for that.

YearComplaintsRecallsCrashesFiresTop problemGrade
20081271232BrakesC
20071173111BrakesC
20061865162BrakesD
200529111AirbagsA
20040100-A

Most common RX400H problems

Lexus RX400H recalls 5

Latest RX400H complaints

2006 Lexus RX400HEngine & cooling

My vehicle runs hot after just five minutes and steam or smoke starts emitting from engine with a strange smell. It left me stranded on a narrow and busy highway where I felt unsafe

Filed Incident EngineNHTSA 11762434
2008 Lexus RX400HTransmission & drivetrainLights

1. Ignition System: While driving the key in the ignition lock came out loose! Exremely frightened and managed to pull the car over to a driveway. But, the car could NOT be stoped using the key fob. Key will not work to stop the engine. Very unusual and unexpected incidence. 2. Lighting system switch: Suddenly the knob of the light switch came out loose with a plastic shaft and will not turn on the light. Very unsafe while driving and it became dark due to storm and rain, and I wanted to turn the headlights for safety. I beleive it is a manufaturing defect and causes severe safety issue.

Filed Incident Power train · Exterior lighting · Unknown or otherNHTSA 11754996
2008 Lexus RX400HElectrical systemAcceleration & cruise controlEngine & cooling

Dear Sir or Madam. My name is [[redacted]], [[redacted]], [[redacted]] living in [[redacted]]. I bought my 2008 Lexus RX400h car, used, in 2014 at a non-Lexus dealership in the [[redacted]] where I used to live. My Lexus VIN is: [[redacted]]. I've been satisfied with the car..until today. The car had been running smoothly forever, and this morning while I was driving I came to a stop (red light) and the car suddenly shut down completely, including the loss of lights, and the whole dashboard went dark. Other cars...

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behind me were honking their horns. I could not even turn on the hazard lights. After 1-2 minutes, all of the lights/warnings started coming on one after the other. I started the car again and run around three different errands without having further issues. I checked online to see if other owners had experienced a similar situation, which is the case. One person said that there had been two recalls in 2011 and 2013, both related to the inverter module inside the hybrid system. Although, I called today a Lexus dealership, [[redacted]], located in [[redacted]], and I was told there are no recalls for the VIN number that I provided. Another owner said she/he went to a Lexus dealer in [[redacted]] and she was told it was a defect in the gutter drainage design and that water gets into the hybrid system. This is a dangerous and potentially catastrophic situation if the vehicle suddenly shuts down on a freeway/highway putting passengers in risk of harm, injury, or death. This is a horrific defect which Lexus should correct immediately with a recall before one of us ends up at the cementery. I am glad to know that organizations such as the NHTSA exist, and I will appreciate very much that immediate action is taken on this matter. Sincerely, [[redacted]]. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Filed Incident Electrical system · Vehicle speed control · EngineNHTSA 11743901
2007 Lexus RX400HBrakes

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...

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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.

Filed Incident Service brakesNHTSA 11732484
2008 Lexus RX400HBrakes

While trying to leave my driveway my brakes went out almost causing me to go through a pasture fence. On the dash board popped up ABS and VSC warning. Now the module and regulator is making a horrible sound. And clicks

Filed Incident Service brakesNHTSA 11731465
2006 Lexus RX400HBrakes

Brake system sets a high tone pitch indicating failure accompanied by all Brake, ABS, PS, Traction Control Lights. This is an know failure for Hybrid systems. It can occur completely random, while driving without notice. Complete brake pressure is lost with exception of a hard feel to the pedal that allows some incomplete breaking to occur and can also cause locking of the brakes at slower speeds. We replaced The brake actuator as recommended with factory new in March of 2024 Started much earlier. Problem has returned Summer of 2025.

Filed Incident Service brakesNHTSA 11710717

Questions about the Lexus RX400H

Which Lexus RX400H years have the most problems?

By the number of complaints owners filed with NHTSA: 2006 (186), 2008 (127), 2007 (117). Allowing for how long each has been on the road, the 2006 stands out most. Complaint counts also rise with sales, so compare years of the same model rather than different models.

Which Lexus RX400H years have the fewest complaints?

Among model years that have been on the road for at least three years, 2004, 2005 have the best Safety Index - the fewest complaints, crashes and recalls for their age compared with other RX400H years. Always check the exact vehicle's recalls by VIN before you buy.

What are the most common Lexus RX400H problems?

Across every model year, owners report problems with the brakes (130), electrical system (68), engine & cooling (58) most often.

How many recalls does the Lexus RX400H have?

NHTSA lists 5 recalls across all Lexus RX400H model years. Each year's page lists the recalls for that year; check your own vehicle by VIN at nhtsa.gov/recalls to see whether the repair has been done.

Source: U.S. National Highway Traffic Safety Administration (NHTSA) complaints and recalls, checked daily. Complaints are owners' own reports and are not verified. How we use the data

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