2019 INFINITI QX30 Electric Steering Motor: Heavy Steering, Warning Lights, and Replacement Costs
This guide covers the common causes of power steering failure in the 2019 INFINITI QX30, from warning lights and sudden heavy steering to critical safety recalls you need to know about.
- The 2019 QX30 has an electric power steering motor, not a hydraulic pump. There is no power steering fluid to check or change.
- Sudden heavy steering with a warning light is the primary symptom of failure. The cause can be the motor, a bad connection, or a weak battery.
- Before replacing the motor, check for a critical safety recall (PG1CF) on the lower steering shaft, which can cause similar symptoms and lead to a loss of steering.
- A new OEM motor is extremely expensive (around $2,700), making a verified used OEM part the most cost-effective solution.
Symptoms of a Failing Power Steering Motor
Failure of the electric power steering motor in the 2019 QX30 is typically sudden and obvious. Unlike a slowly failing hydraulic pump that might whine for weeks, an EPS motor failure is often an immediate electronic or mechanical event.
1. Sudden Heavy Steering & Warning Light
The most common symptom is a sudden, complete loss of power assist. The steering wheel will become extremely difficult to turn, especially at low speeds or when parking. This is almost always accompanied by a power steering warning light on the instrument cluster, often with a message like "Power Steering Malfunction See Owners Manual". This failure can be intermittent at first, sometimes resolving itself after restarting the car, which often points to an electronic glitch, a weak battery, or a poor electrical connection.
2. Vibrating or Spongy Steering
Some owners of the mechanically similar Mercedes-Benz GLA have reported violent vibrations in the steering wheel or a 'spongy' feeling. In some cases, this was traced to a corroded electrical connector on the power steering control module. Before assuming the entire motor has failed, it is worth inspecting the wiring harness and connectors for any signs of corrosion or damage.
3. Grinding or Clicking Noises
While less common than the silent electronic failure, mechanical issues inside the motor or the steering rack it's attached to can cause grinding or clicking noises when you turn the wheel. This indicates a serious internal problem.
Important: The QX30 shares its platform with the Mercedes-Benz GLA, which had a recall for water leaking into the power steering control unit, causing failure. Check for signs of water intrusion or corrosion around the motor and its electrical connectors, as this is a known weak point for the underlying design.
Known Issues, Recalls, and Technical Service Bulletins (TSBs)
Before replacing the power steering motor, it is critical to check if your vehicle is affected by a major safety recall for the steering system. The symptoms can be similar to a motor failure.
Safety Recall PG1CF: Lower Steering Shaft Separation
Nissan/INFINITI issued a recall (NHTSA ID: 21V419000) for certain QX30 vehicles due to a defective lower steering shaft. On affected vehicles, the universal joint bearing can separate from the shaft, leading to imprecise steering, noises, and a potential total loss of steering control. The symptoms—imprecise steering feel and noise—could be mistaken for a rack or motor issue. A dealer can check your VIN to see if this recall applies and perform the repair for free.
Diagnosing the Problem
If your steering becomes heavy, follow these diagnostic steps:
- Check for Recalls: First, have an INFINITI dealer check your VIN for open recalls, especially recall PG1CF.
- Check the Battery: EPS systems draw significant electrical current. A weak or failing battery can cause intermittent power steering faults and warning lights. Test the battery and charging system to ensure they are providing stable voltage (above 12.4V with the engine off, 13.8V-14.4V when running).
- Inspect Electrical Connectors: Carefully inspect the main electrical connector going to the power steering motor on the rack. Look for any green or white crusty buildup indicating corrosion. Cleaning the connector with electrical contact cleaner and applying dielectric grease may solve the problem.
- Scan for Fault Codes: A professional OBD2 scanner that can read chassis codes can pinpoint the exact fault, such as a communication error, a fault with the steering angle sensor, or an internal motor failure.
Buying a Used PS Pump/Motor
Given that a new OEM power steering motor costs over $2,500, a used OEM unit is the most practical and economical choice for most owners. Aftermarket options are scarce and may not have the same reliability as the original equipment.
What to Look For:
- Part Number Verification: This is the most critical step. The initial part number was 28500-5DF0C, which was later superseded by 28500-HW20A. You must verify the part number on your vehicle's original motor before purchasing a replacement to ensure compatibility.
- Inspect the Connectors: Ask for clear photos of the electrical connector pins. Do not buy a unit with any signs of corrosion, bent pins, or damage to the connector housing. This is a known failure point.
- Check for Physical Damage: Inspect the motor housing for cracks, dents, or any signs of impact. Since it's located under the car, it can be damaged by road debris or improper jacking.
- Mileage and Source: A part from a lower-mileage, accident-free vehicle is always preferable. For an electronic part like this, age and heat cycles matter as much as mileage.
Pro Tip: When replacing the motor, it is wise to also replace the two mounting bolts. After installation, a steering angle sensor calibration and a full four-wheel alignment are often necessary to ensure the system functions correctly and to prevent uneven tire wear.
Cost Breakdown for Replacement
The cost to replace the QX30's power steering motor is significant, primarily due to the high price of the part itself.
| Part/Service | Estimated Cost |
|---|---|
| New OEM Motor | $2,600 - $2,800 |
| New Aftermarket Motor | Not commonly available |
| Used OEM Motor | $350 - $800 |
| Shop Labor | $350 - $600 (3-5 hours) |
| Total (with Used OEM) | $700 - $1,400 |
Costs are estimates and will vary based on your location and the specific repair shop.
Frequently Asked Questions (FAQ)
Why did my steering suddenly get very heavy?
This is the classic symptom of an electric power steering (EPS) failure. The electric motor that provides steering assistance has shut down, and you are now turning the wheels with pure manual effort. This could be due to an internal motor fault, a bad electrical connection, a blown fuse, or even a weak vehicle battery.
Is it safe to drive with the power steering warning light on?
While the car is technically steerable, it is not safe to drive for extended periods. The amount of physical effort required to turn the wheel, especially in an emergency maneuver or when parking, is dangerously high and can lead to an accident. You should have the vehicle serviced as soon as possible.
Do I have to replace the entire steering rack?
Not necessarily. The electric assist motor can be purchased and replaced separately from the steering rack assembly. However, if the problem is caused by an issue within the rack itself (like a bad sensor or internal binding), then the entire rack may need to be replaced. A proper diagnosis is key to avoiding unnecessary expense.
Does the replacement motor need to be programmed?
In many cases, the system may require a steering angle sensor calibration after the motor is replaced or if the battery was disconnected. This procedure helps the car's computer understand the steering wheel's position. Sometimes this can be done by simply turning the wheel from full lock to full lock, but other times it requires a diagnostic tool at a repair shop.
Technical Specifications
OEM Part Numbers: 28500-5DF0C 28500-HW20A 285005DF0C 28500HW20A
Rack-mounted electric motor and controller assembly. Supersedes part number 28500-5DF0C.
The information in this article is provided for general reference and educational purposes only. Vehicle specifications, procedures, and part compatibility can vary by production date, trim level, and region. Always consult your vehicle's factory service manual and verify part numbers before purchasing or performing repairs. Safety-critical components such as airbags, seat belts, and braking systems should be installed by a qualified professional.
- INFINITI QX30:
- Symptoms of a Failing Power Steering Motor
- 1. Sudden Heavy Steering & Warning Light
- 2. Vibrating or Spongy Steering
- 3. Grinding or Clicking Noises
- Known Issues, Recalls, and Technical Service Bulletins (TSBs)
- Safety Recall PG1CF: Lower Steering Shaft Separation
- Diagnosing the Problem
- Buying a Used PS Pump/Motor
- What to Look For:
- Cost Breakdown for Replacement
- Frequently Asked Questions (FAQ)
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