Problems · NHTSA complaints

2019 Lexus NX300H problems

Owners filed 8 complaints about the 2019 Lexus NX300H with NHTSA between Jun 2025 and Aug 2026. The most-cited component is engine and engine cooling (2).

Complaints
8
Filed with NHTSA
Crashes
0
Reported by owners
Fires
0
Reported by owners
Injuries
0
People reported injured
Deaths
0
Reported to NHTSA
01 —By component

Complaints by component

One complaint can cite several components
  1. Engine and engine cooling2
  2. Fuel/propulsion system2
  3. Back over prevention2
  4. Forward collision avoidance2
  5. Lane departure1
  6. Fuel system, gasoline1
  7. Steering1
  8. Power train1
  9. Other / unknown1

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 Nov 10, 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
20254
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 and engine cooling

2 reports
“The contact owns a 2019 Lexus NX-300H. The contact stated that while driving uphill at an undisclosed speed, the vehicle stalled. The failure was a recurring failure. The dealer was contacted, and the vehicle was diagnosed. The contact was informed that there was coolant leaking into the engine block and that the engine needed to be replaced. The contact associated the failure with NHTSA Campaign Number: 20V064000 (Engine and Engine Cooling); however, the VIN was not included. The manufacturer was not made aware of the failure. The failure mileage was 103,755.”
Owner complaint to NHTSAFiled Aug 6, 2026Engine and engine coolingODI 11755344

Fuel/propulsion system

2 reports
“While the car was idled at a stop light, the warning "reduce engine powere appeared". I took the car to the vehicle and learned this was linked to code P125d71 for fuel pump valve control- a known recall”
Owner complaint to NHTSAFiled Apr 17, 2026Fuel/propulsion systemODI 11731988

Back over prevention

2 reports
“In heavy rain situations I get an error message stating all front active safety systems (forward collision warning, etc.) do not work. The error states to clean or clear the front sensors of the vehicle. There is nothing blocking the sensors but in heavy weather these situations become much more important. Lexus states this is normal when heavy water situations come into play. I understand for going through flood waters but I don't believe it should be in heavy rain. I feel this is a major safety hazard that should come with warnings.”
Owner complaint to NHTSAFiled Apr 3, 2026Back over prevention, Forward collision avoidanceODI 11728970

Forward collision avoidance

2 reports
“During heavy wind driven rain the front sensors start to show errors on the screen. These errors cause the the advance safety systems and parking sensors to deactivate. The warnings state to clean the sensors. Sometimes stopping the vehicle and turning off and on the ignition seems to resent but it does happen again. Usually this takes about 30 minutes of heavy rain to cause the. All other functions of the vehicle work but most safety systems appear to deactivate because of the sensors. This should not happen during a time when the systems are most needed.”
Owner complaint to NHTSAFiled Nov 12, 2025Lane departure, Back over prevention, Forward collision avoidanceODI 11698895

Lane departure

1 report

Fuel system, gasoline

1 report
“The contact owns a 2019 Lexus NX 300. The contact stated that while stopped at a red light, the RPM started to fluctuate. There was no warning light illuminated. The vehicle was taken to an independent mechanic to be diagnosed, and the mechanic retrieved DTC: P0300 and P11EF. Additionally, the check engine warning light was illuminated. The vehicle was then taken to a local dealer to be diagnosed, and the contact was informed that the fuel injector was faulty and needed to be replaced. The vehicle was not repaired. The contact referenced NHTSA Campaign Number: 25V028000 (FUEL SYSTEM, GASOLINE) as a possible cause for the failure. The manufacturer was notified of the failure. The approximate failure mileage was 144,000.”
Owner complaint to NHTSAFiled Oct 7, 2025Fuel system, gasolineODI 11691936
Data from NHTSA Complaints API (owner reports, unverified) · synced Nov 10, 2026

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