Problems · NHTSA complaints

2015 Lexus RX450H problems

Owners filed 25 complaints about the 2015 Lexus RX450H with NHTSA between Mar 2015 and May 2026. The most-cited component is engine (7).

Complaints
25
Filed with NHTSA
Crashes
2
Reported by owners
Fires
1
Reported by owners
Injuries
1
People reported injured
Deaths
0
Reported to NHTSA
01 —By component

Complaints by component

One complaint can cite several components
  1. Engine7
  2. Electrical system4
  3. Service brakes4
  4. Steering4
  5. Power train3
  6. Lane departure3
  7. Latches/locks/linkages2
  8. Fuel/propulsion system1
  9. Forward collision avoidance1
  10. Structure1
  11. Tires1
  12. Air bags1
  13. Vehicle speed control1
  14. Electronic stability control (esc)1

Complaints are unverified owner reports to NHTSA and are not normalized for sales volume. One complaint can cite several components.

Data from NHTSA Complaints API · synced Oct 28, 2026NHTSA vehicle page
02 —Trend

When complaints were filed

Does it get worse with age? Complaints per calendar year filed
View as table
Model yearComplaints filed per calendar year
20151
20160
20173
20180
20191
20200
20211
20224
20232
20247
20252
20264

Mileage at failure isn’t a structured field in NHTSA complaint data, so we don’t chart it. Some owners mention it in their reports below.

03 —Owner reports

Top problems in owners’ words

Verbatim from NHTSA complaints, newest first

Engine

7 reports2 crashes
“First, We are a victim of fraud and scam and are distressed since day one and loss of thousands of dollars. After searching and reviews, we bought a 2015 Lexus RX350 for family use from a seller who had owned this vehicle for over five years but the seller never disclosed and represented in the sale of this vehicle that It was rebuilt and had engine front cover timing gasket leak! They said it was clean title and didn’t have any issues. Plus the blind spot sensors had issues. The same day these problems were recovered after we bought it and from the same first day we tried to return the vehicle and used all other option legally from day one till now to resolve it with the seller, but they didn’t want to resolve neither return it or fix the problems with vehicle but they kept denying. Vehicle been sitting in parking lot since the first day of bought and never able to register and it’s been over 8 months. Also found out, these year models like mine 2015 RX350 timing cover leak were common problem back then. I’m desperately asking to issue a fix remedy by Lexus or Toyota therefore, please help with this.. thanks in advance!”
Owner complaint to NHTSAFiled Dec 14, 2024Engine, Lane departureCrash reportedODI 11630709

Electrical system

4 reports
“I purchased this vehicle on January 5, 2026, from a family-owned dealership in Broken Arrow, OK. The vehicle was purchased “as-is” with a guarantee of sale and a Carfax report. After purchasing the vehicle, I drove it home and it remained parked until January 8, 2026. On Thursday, January 8, 2026, the vehicle experienced an unexpected engine stall while I was driving. At the same time, the slip indicator light and traction control appeared to engage. I contacted the dealership immediately to report the issue, and the vehicle was towed back to JT Wholesale Auto Sales on Friday, January 9, 2026. On Tuesday, January 13, 2026, I was informed by the dealership that the vehicle had undergone a complete inspection and that no mechanical issues were found. Relying on this representation, I retrieved the vehicle and drove it home. However, after retrieving the vehicle, I continued to have concerns regarding its condition. On Thursday, January 15, 2026, I took the vehicle to Stellar Auto Service located at 2209 N. Yellowood Ave., Broken Arrow, OK 74012 for an independent inspection. Stellar Auto Service specializes in Lexus and Toyota vehicles. During their inspection,…”
Owner complaint to NHTSAFiled Mar 17, 2026Power train, Electrical system, Service brakesODI 11725110

Service brakes

4 reports
“BRAKING SYSTEM OF THE CAR FAILED. I COULD NOT STOP THE CAR AND ALL THE WARNING LIGHTS, ENGINE WARNING LIGHTS, CHECK HYBRID SYSTEM, AND VEHICLE WARNING LIGHTS APPEARED ON THE DASHBOARD OF THE CAR. THE CAR WAS PURCHASED NEW WITH 71 MILES, THE CAR WAS NEVER IN AN ACCIDENT, THE CAR HAD NOTHING INSTALLED TO IT, THE CAR WAS SERVICED BY LEXUS FOR 10,000 MILE OIL CHANGE, AND THE CAR HAD 14693 MILES WHEN THE BRAKING SYSTEM FAILED ON AUGUST 7, 2017. THE CAR WAS DRIVEN ON A SUNNY DAY ON DRY FLAT ASPHALT ROAD IN CHICAGO ILLINOIS. THE BRAKING SYSTEM FAILURE OCCURRED AT FOSTER AVENUE AND CALIFORNIA AVENUE. ONCE ALL THE WARNING LIGHTS APPEARED ON THE DASHBOARD AS LISTED ABOVE, THE BRAKES IN THE CAR STARTED TO PUMP UP AND DOWN EVERY SECOND BY ITSELF. THE CAR WAS UNABLE TO STOP AS I FORCEFULLY STEPPED ON THE BRAKES. THE BRAKES CONTINUE TO PUMP UP AND DOWN SO I HAD TO VEER THE CAR TO THE RIGHT SIDE OF THE STREET WHILE PRESSING ON THE PARKING BRAKES OF THE CAR TO STOP THE CAR. THE BRAKES CONTINUE TO PUMP UP AND DOWN FOR 10 MINUTES UNTIL I WAS ABLE TO FORCEFULLY STEP ON THE BRAKES AGAIN TO SHIFT THE CAR INTO PARK TO TURN OFF THE CAR. ONCE THE CAR WAS TURNED ON AFTER 20 MINUTES THE…”
Owner complaint to NHTSAFiled Sep 5, 2017Electronic stability control (esc), Service brakes, EngineODI 11021469

Steering

4 reports
“The contact owns a 2015 Lexus RX. The contact stated that while operating the vehicle, the steering wheel was shaking and vibrating, and it was loose. The vehicle was taken to a local independent dealer who replaced the control arms, but the failure persisted. The vehicle was taken to an independent mechanic, who diagnosed the vehicle and determined that the power steering rack needed to be replaced. The vehicle was not yet repaired. No further information was available. The failure mileage was 118,000. The VIN was not available.”
Owner complaint to NHTSAFiled Mar 4, 2026SteeringODI 11722042

Power train

3 reports
“Transfer case spontaneously fractured,mounting point on transmission broke. Unable to drive Repair cost approximately $13,000”
Owner complaint to NHTSAFiled May 4, 2026Power trainODI 11735659

Lane departure

3 reports1 crash
“Blind Spot Warning. Available for inspection Warning Monitor goes on and off on a regular basis and light on dash identifies this problem No, not confirmed No, not inspected warning light on dash, message states failure”
Owner complaint to NHTSAFiled Dec 28, 2025Lane departureODI 11707346
Data from NHTSA Complaints API (owner reports, unverified) · synced Oct 28, 2026

Complaints are unverified owner reports to NHTSA and are not normalized for sales volume. One complaint can cite several components.