2018 Lexus NX300HRecalls, problems, MPG & safety
NHTSA lists 0 safety recalls and 20 owner complaints for the 2018 Lexus NX300H. Most complaints involve fuel/propulsion system (7) and engine (4). The EPA rates it 31 mpg combined, and NHTSA gives it 5 stars overall.
Safety recalls
Owner complaints by component
- Fuel/propulsion system7
- Engine4
- Service brakes4
- Electrical system3
- Steering2
- Carry handle, shell, base1
- Fuel system, gasoline1
- Vehicle speed control1
- Visibility/wiper1
Complaints are unverified owner reports to NHTSA and are not normalized for sales volume. One complaint can cite several components.
What owners report most
Fuel/propulsion system
“My 2018 Lexus NX300 F Sport, stalled while driving, pulled over to safe location turned off vehicle, restarted and proceeded to drive a little. Warning came up on display " Engine power reduced, go to dealer". I was able to drive the car home since it was only 2 miles away. Looked up issue on internet and noticed a recall for said problem. Said do not drive, car is in "limp" mode. Had my car towed to MacIntosh Imports (they only service Lexus & Toyota) they checked diagnostics and code DTC P125D71 Fuel Control Valve stuck. The defect could lead to engine stalling, increasing the risk of crash. Affected vehicles were equipped with a fuel pump that may fail. My vin is not listed on recall, I feel it should be included since the symptoms match and asking Lexus to check for Customer Support Program coverage to fix in "good faith"”
Engine
“The contact owns a 2018 Lexus NX300. The contact stated while driving at approximately 70 MPH, the message "Check Oil" and the Master Warning Light was flashing on the instrument cluster. The contact stated that the vehicle stalled. The contact was able to restart the vehicle; however, the vehicle stalled several times and failed to exceed 40 MPH while driving to the dealer. The contact stated that the dealer diagnosed the vehicle and determined that the fuel pump needed to be replaced. The vehicle was not repaired. Additionally, the contact stated that the fuel pump was replaced in April of 2024. The manufacturer was not informed of the failure. The failure mileage was approximately 232,000.”
Service brakes
“After 45 minutes in stop-and-go traffic the brake pedal went to the floor four times, the Brake Override System (BOS) failed, throwing the shifter into Park failed, and we hit the car in front of us. No warning sounds typical for this car sounded and no lights appeared on the dash. Thankfully, we were only moving at 5 mph which I didn't think qualified as a "crash" but there was indeed a collision. No one was hurt. Besides my wife and myself there were two backseat passengers who also saw my efforts to stop the car. We had the car towed to Lexus of Santa Monica. Unsurprisingly, Ronald Inton with Toyota Motor North America, Inc. (TMNA) indicated in his letter to us that Lexus inspectors seeing our crumpled front license plate and knowing of the failure of the BOS found nothing wrong with the car, but had not driven it under stop-and-go conditions for 45 minutes as we had. The clear failure of the BOS to prevent the collision or even warn of the impending collision was effectively ignored my Mr. Inton. Our full correspondence with him is attached. Both my wife and I loved driving this car but it is a potentially deadly safety hazard and given that TMNA can't fix…”
Engines, transmissions & drive
- EPA class
- Small Sport Utility Vehicle 4WD
- Engines
- 2.5L 4-cyl hybrid
- Transmissions
- Automatic (AV-S6)
- Drive
- All-Wheel Drive
- Fuel
- Regular Gasoline
Towing, payload and dimensions aren’t in the EPA or NHTSA data, so we don’t list them.
EPA fuel economy by version
| Version | City | Hwy | Comb. | Fuel / yr | CO₂ g/mi |
|---|---|---|---|---|---|
| NX 300h AWD Auto (AV-S6), 4 cyl, 2.5 L · All-Wheel Drive | 33 | 30 | 31 | $2,000 | 283 |
- 31mpg comb.
NHTSA 5-Star Safety Ratings
- Frontal crash
- 4 of 5
- Side crash
- 5 of 5
- Side pole
- 4 of 5
- Rollover
- 4 of 5
- Rollover risk
- 16.0%
Maintenance basics
| Item | Miles | Time | Note |
|---|---|---|---|
| Engine oil & filter | 5,000–10,000 mi | 6–12 months | Follow the oil-life monitor if fitted |
| Tire rotation | 5,000–7,500 mi | Every oil change | Check pressure monthly |
| Engine air filter | 15,000–30,000 mi | 1–2 years | Sooner in dusty areas |
| Cabin air filter | 15,000–25,000 mi | 1–2 years | |
| Brake fluid | — | 2–3 years | Absorbs moisture over time |
| Coolant | 60,000–100,000 mi | 5–10 years | Long-life coolants last longer |
| Spark plugs | 60,000–100,000 mi | — | Iridium/platinum plugs at the long end |
| 12V battery | — | 3–5 years | Heat shortens battery life |
- Engine oil & filter5,000–10,000 mi
6–12 months - Tire rotation5,000–7,500 mi
Every oil change - Engine air filter15,000–30,000 mi
1–2 years - Cabin air filter15,000–25,000 mi
1–2 years - Brake fluid—
2–3 years - Coolant60,000–100,000 mi
5–10 years - Spark plugs60,000–100,000 mi
— - 12V battery—
3–5 years
2018 NX300H questions
How many recalls does the 2018 Lexus NX300H have?
0 recalls found in NHTSA data as of Nov 10, 2026.
What are the most common 2018 Lexus NX300H problems?
Owners filed 20 complaints with NHTSA. The most-cited components are fuel/propulsion system (7), engine (4), service brakes (4). Complaints are unverified owner reports and aren't adjusted for how many cars were sold.
What MPG does the 2018 Lexus NX300H get?
The EPA rates the 2018 Lexus NX300H at 31 mpg combined, depending on engine and drivetrain (1 version rated).
How safe is the 2018 Lexus NX300H?
NHTSA's New Car Assessment Program gives the 2018 Lexus NX300H 5 out of 5 stars overall.