Most common 2018 Infiniti QX30 problems
Share of the 24 complaints; one complaint can involve more than one system. "~" is the median mileage when the problem started.
Infiniti QX30 complaints by model year
2018 Infiniti QX30 recalls (3)
Back over prevention › Sensing system › Camera
Nissan North America, Inc. (Nissan) is recalling certain 2018-2019 Nissan Altima, Armada, Frontier, Kicks, Leaf, Maxima, Murano, NV, NV200, Pathfinder, Rogue, Rogue Sport, Sentra, Titan, Titan Diesel, Versa Note and Versa Sedan vehicles, as well as Infiniti Q50, Q60, QX30 and QX80 vehicles.
Remedy: Nissan will notify owners in phases, having dealers update the back-up camera settings software, free of charge. The recall began November 11, 2019 and all affected VINs should be activated.
Seat belts › Front › Anchorage
Nissan North America, Inc. (Nissan) is recalling certain 2018 Infiniti QX30 vehicles. The bolt securing the right-hand side lower seat belt anchorage may have been incorrectly installed during production. This can result in the lower seat belt anchorage detaching in a crash.
Remedy: Nissan will notify owners, and dealers will weld in a new retaining plate and secure the seat belt anchorage with a new anchor bolt, free of charge. All vehicles were repaired July 17, 2018.
Air bags › Frontal
Nissan North America, Inc. (Nissan) is recalling 2017-2018 Infiniti QX30 vehicles. The driver's air bag may unexpectedly deploy due to insufficient grounding of the steering components if an electrostatic discharge occurs and the air bag clockspring is broken.
Remedy: Nissan will notify owners, and dealers will add sufficient grounding to the steering components, free of charge. The recall began March 26, 2018. Owners may contact Infiniti customer service at 1-800-622-6200, option 7.
NHTSA defect investigations
Federal safety investigators have looked into a possible defect involving the 2018 Infiniti QX30:
Desiccated Air Bag Inflator Rupture
From 2000 through 2017, Takata produced millions of air bag inflators using two types of phase-stabilized ammonium nitrate ("PSAN") propellant -- propellant 2004 and propellant 2004L. After prolonged exposure to high temperature cycles and humidity, inflators using propellant 2004 can degrade, causing the propellant to burn too quickly when ignited.
What 2018 Infiniti QX30 owners say
Electrical system
The contact owns a 2018 Infiniti QX30. The contact stated while driving approximately 50 MPH, the vehicle erroneously shifted into neutral(N) and stalled inadvertently. The contact was able to pull to the side of the road. The vehicle failed to restart. The message "Service Required - Do Not Shift Gears - Visit Dealer" was displayed temporarily. The vehicle was towed to the local dealer and it was diagnosed and determined that the auxiliary battery needed to be replaced. The vehicle was not repaired. The manufacturer was notified of the failure and referred the contact to the NHTSA Hotline for assistance. The failure mileage was approximately 40,000.
A variety of dashboard lights illuminated including engine light, ABS, emergency brake failure message etc. Vehicle drove as if power steering had failed. When I brought the car in to the Dealer I was told that the vehicle displayed codes for two concerns: 1) air quality sensor and 2) all 4 wheel speed sensors. The wheel speed sensors had previously been replaced in 2019 while the car was still under warranty. Current estimate for the repair was over $3200. Ultimately, Infiniti corporate paid for the current repair stating these items were "under warranty' from previous repair. This is the SECOND REPAIR for 4 out of 5 sensors.These failures are red-flagged in the repair estimate as "critical concerns" by Infiniti service. For context, this is a well-maintained vehicle with under 10,000 miles on it. I am the original owner. …
Engine & cooling
The contact owns a 2018 Infiniti QX30. The contact stated that the check engine warning light was illuminated. The vehicle was taken to an independent mechanic, where the diagnostic trouble codes P052E71 and P053A-00 were retrieved. The mechanic determined that the crankcase ventilation system intake valve had failed. The mechanic also informed the contact that the vehicle was a Mercedes-Benz vehicle that the Infiniti manufacturer had rebranded as an Infiniti vehicle. The mechanic confirmed that the engine was a Mercedes-Benz engine. The dealer was notified of the failure. The contact attempted to purchase the part from the dealer, but the dealer provided the incorrect part. The vehicle was not repaired. The contact stated that while driving and coming to a stop, the vehicle stalled intermittently. The contact was able to restart the vehicle and continue driving. …
The contact owns a 2018 Infiniti QX30. The contact stated while driving at various highway speeds, the vehicle suddenly decelerated to 30 MPH. During the failure the check engine warning light illuminated and the message "Inoperative - See Owner's Manual" was displayed. The vehicle was taken to the local dealer on several occasions and the ignition module, engine cylinders, brake wiring harness and brake sensor were replaced; however, the failure persisted. The manufacturer was notified of the failure. The failure mileage was 23,000.
Steering
The contact owns a 2018 Infiniti QX30. The contact stated that while driving at an undisclosed speed, there was an abnormal clicking sound coming from the steering wheel, with several unknown warning lights illuminated. The vehicle was taken to the dealer, where it was diagnosed with a failed clockspring. The contact was informed that the clockspring needed to be replaced. The vehicle was not repaired. The contact was informed that the vehicle was repaired under an undisclosed recall in 2018. The manufacturer was made aware of the failure, and a case was filed. The contact was informed that the repair was not covered under the previous recall. The failure mileage was approximately 52,000.
The vehicle, with low mileage and no accidents, has had a few engine-related issues over the last few months. Recently, I went to turn it on, and many components of the car wouldn't work (no parking, power steering, engine issues, seats won't move, etc.). I live in a very dangerous city, and my car not working has placed me in a dangerous concern for my well-being. I took it to certified Infiniti dealer who said that the entire electrical harness has been damaged, rendering the vehicle a safety hazard, and quoted me $19,000 in repairs. Infiniti corporate refused to assist in repairing the damage that many people have reported having in this specific Infiniti model.
2018 Infiniti QX30 engines & fuel economy
| Engine | Transmission | Drive | MPG city / hwy / combined |
|---|---|---|---|
| 2.0L 4-cyl turbo | 7-speed dual-clutch | RWD | 24 / 33 / 27 |
| 2.0L 4-cyl turbo | 7-speed dual-clutch | AWD | 21 / 30 / 25 |
EPA ratings. Class: Compact car.
Frequently asked questions
Is the 2018 Infiniti QX30 a good car?
There isn't enough complaint history for the QX30 to compare model years reliably. So far owners have filed 24 complaints with NHTSA.
What is the most common problem with the 2018 Infiniti QX30?
The electrical system — 10 complaints, 42% of all complaints for this model year, most often about 12v/24v/48v battery. Next are the engine & cooling (5) and steering (4).
How many recalls does the 2018 Infiniti QX30 have?
There are 3 recalls for the 2018 Infiniti QX30, the most recent from September 12, 2019 (camera). Recall repairs are free at any authorized dealer — check whether yours has been done with the VIN recall check.
At what mileage do 2018 Infiniti QX30 problems happen?
The median mileage reported in complaints is about 40,000 miles; 67% of problems with a recorded mileage started before 50,000 miles.
Source: U.S. National Highway Traffic Safety Administration (NHTSA) — owner complaints through October 20, 2026, recalls and defect investigations; fuel economy from the EPA. Complaints are unverified reports and are not proof of a defect. How we rate model years.