2006 Lexus RX Hybrid Problems

What owners report

Owners of this model year most often describe braking problems: a brief loss of braking or a forward lurch as the regenerative and friction brakes hand off at low speed, often dismissed by dealers as normal. A second, larger theme is a sudden shutdown of the hybrid system at speed with a dash full of warning lights, which dealers have variously attributed to the inverter, the skid control unit, or the brake actuator. Many reports come in between roughly 40,000 and 120,000 miles, and a few describe dashboard cracks and water getting into the body seams.

1. 1
   Hybrid propulsion system

   Hybrid system shutdown at speed with warning lights

   • 41 complaints (27%)
   • median 90,000 mi at 6.1 yrs old (38 state mileage)
   • owner-quoted repair $8,300 (median of 7 quotes)
   • filed 2007–2022

   Complaints describe the engine and electrical system cutting out while driving, with check hybrid, check engine, slip, and VSC warnings appearing on the cluster, and no power steering or power brakes afterward. Several owners say the dealer diagnosed a failed inverter and quoted a replacement, while others say the car restarted or the dealer could not reproduce the problem. Some owners connect the event to the inverter recalls listed for this model year. Mostly reported between about 50,000 and 140,000 miles, often at highway speed, with some failures described as sudden and without warning.

   Recall 13V396000Recall 11V3420001 related service bulletin

   What to check: Ask for service records showing whether the inverter recall work (11V342000 and 13V396000) was completed, and have a pre-purchase inspection check for stored hybrid and inverter codes.

   2 excerpts from owner complaints in NHTSA records

   “2006 Lexus rx400h totally shutting down while I was driving on i4 today. No power steering, no power brakes, engine died and luckily I was able to coast to a safe place from 70mph! Right before it happened, the check engine light came on, the engine misfired, then all of the lights on the dashboard came on including the check vcs, check hybrid and check anti-lock. Had to have it towed to our mechanic because it wouldn't start and could not be driven onto the tow truck. …”

   NHTSA complaint #11103046, filed 2018-06, 133,000 miles

   “Traveling down the interstate between 75-80 MPH, the car completely shut-off. Lost all power and check hybrid system lights came on. Was not able to restart the vehicle. It turns out that the inverter on this car was recalled in june 2011 and I was not notified. I took my car in for service in november of 2011 at the dealership where it was purchased, and they did nothing to resolve the problem. Saline kirkland at Lexus of mobile (service manager) said she found out about the problem one week ago.”

   NHTSA complaint #10454137, filed 2012-04, 62,000 miles
2. 2
   Brakes

   Momentary loss of braking or forward lurch while braking

   • 34 complaints (22%)
   • median 50,200 mi at 4.4 yrs old (29 state mileage)
   • 8 mention a crash, fire or injury
   • filed 2006–2016

   Owners describe the brake pedal briefly releasing or the car surging forward while steady pressure is held, typically as the car slows to a stop or approaches a parking space. Some say it happens at a few miles per hour, others at highway speeds, and a few report hitting a wall or another vehicle. According to the complaints, dealers commonly drove the car, could not duplicate the event, and told owners the behavior was normal for a hybrid's regenerative braking. Reported across a wide mileage range, from very low miles up into the 140,000s, and described as intermittent rather than tied to a particular season.

   What to check: Drive the car at low speed and brake gently to a full stop several times, watching for any surge or pedal release. Ask whether previous owners reported the symptom and what the dealer said.

   2 excerpts from owner complaints in NHTSA records

   “I went to the dealership last morning of feb 3 2010 for my regular serivice. I didn't know yet that time about the story behind the break time lag of prius. Because that day I told Lexus to take a look on my brake as I am having the same problem as the prius. My car is a rx400h 2006 model. Not only I'm having the same problem during slow movement(approaching the traffic light) but even on a high speed(60-65). …”

   NHTSA complaint #10307652, filed 2010-02, 36,500 miles

   “We own a 2006 Lexus rx 400h and occasionally when the brakes are pressed the car 'jumps' forward. We have taken our vehicle to the Lexus dealership several times to report the issue but they always return and tell us nothing it wrong with the vehicles braking system. This event does not occur all the time, we are concerned that if we are required to stop suddenly to avoid an accident, etc. That our vehicle will jump and we will cause an accident.”

   NHTSA complaint #10316806, filed 2010-03, 40,000 miles
3. 3
   Brakes

   Brake pedal to the floor / ABS and VSC lights on

   • 22 complaints (14%)
   • median 115,000 mi at 11.5 yrs old (20 state mileage)
   • 2 mention a crash, fire or injury
   • filed 2007–2022

   Owners describe the pedal traveling to the floor with little or no braking, sometimes accompanied by ABS, VSC, and brake warning lights. According to the complaints, shops diagnosed a failed brake actuator, ABS accumulator, or skid control unit, with repair estimates in the thousands. A few report the same symptom recurring over months or years without repair. Most often reported from roughly 90,000 miles upward, with several cases past 150,000 miles.

   What to check: Check that no ABS, VSC, or brake warning lights are lit, and ask whether the brake actuator or ABS accumulator has ever been replaced, since the part is costly.

   2 excerpts from owner complaints in NHTSA records

   “I have ABS vsc and several other lights on on the dash. The response from Lexus is I need a new ABS accumulator assembly. Costs is in the thousands. The similar model design pump was used in the 2007-2011 camry. Toyota has issued a warranty extension on that pump. Why has the rx400h and the highlander not received this extension!”

   NHTSA complaint #10838884, filed 2016-02, 130,000 miles

   “After the vehicle been working perfectly, after overnight the various warning lamps, including the mal function indicator lamp, slip indicator light, brake system warning light, master warning light, and check vsc system message showed up on the instrument panel. When the vehicle were in motion, the breaks went in blank, continuing running even with the break pedal pressed. The vehicle only stoped with the emergency breaks. …”

   NHTSA complaint #11075219, filed 2018-02, 1 miles

Buying note. These cars are old enough that condition and service history matter more than the model's reputation, so have a pre-purchase inspection check the brakes, hybrid system, and for water in the floor wells. Confirm which of the inverter recalls were completed on the specific vehicle before you buy.

Summary written with AI from a sample of 60 NHTSA complaints for this model year (picked at random, with complaints that state a mileage and recent ones taken first), then checked automatically against the source records. Where a problem shows a complaint count, every complaint for this model year was matched with fixed keyword rules (written with AI and tested against the sample), and the mileage, age and repair figures are calculated from those complaints; owners' figures are as stated, not verified. Other counts refer to the sample. The excerpts come from NHTSA's public complaint records and are unverified; capitalisation is normalised, NHTSA staff notes are removed, and shortened text ends with “…”. Something wrong? Request a correction.