2017-2018 Mazda 3 Power Steering Motor: Failure Symptoms and Compatibility Warnings

Understanding the 2017-2018 Mazda 3 Electric Power Steering System

The 2017-2018 Mazda 3 features a column-mounted Electric Power Steering (EPS) system. This means an electric motor is attached to the steering column inside the cabin, under the dashboard. It receives signals from a control module that monitors your steering input and vehicle speed to provide the right amount of assistance. This system is entirely electric and does not use any power steering fluid, pumps, or hoses like older hydraulic systems. While efficient and reliable, failure of the assist motor can lead to a sudden and significant increase in steering effort.

Critical Compatibility Warnings: Read Before Buying

Compatibility for this part is very specific and depends on your vehicle's factory options. Ordering the wrong part will result in a non-functional power steering system. Before purchasing a replacement motor, you must verify if your 2017-2018 Mazda 3 is equipped with:

• Active Grille Shutters: These are flaps in the front grille that open and close automatically to improve aerodynamics and are typically part of higher trim packages.
• i-Eloop Regenerative Braking System: This is a feature that captures energy during braking to power the vehicle's electrical systems.

The power steering assist motors listed in this guide (OEM Part Numbers BABT-67-88Z, BABT-67-88ZA, BADK-67-88Z, BADK-67-88ZA) are specifically for models that DO NOT have Active Grille Shutters and DO NOT have the i-Eloop system. Always verify your vehicle's specific configuration before ordering.

Symptoms of a Failing Power Steering Assist Motor

Failure of the EPS motor is usually sudden and electronic in nature. Here are the most common symptoms:

• Power Steering Malfunction Warning Light: The most common indicator is the illumination of the power steering warning light on the dashboard, which looks like a steering wheel with an exclamation mark next to it. 🎬 Watch: How to reset your power steering warning light This light signals that the system has detected a fault.
• Sudden Loss of Power Assist: The steering may suddenly become very heavy and difficult to turn, especially at low speeds or when parking. The vehicle will still be steerable, but it will require significantly more physical effort.
• Intermittent Failure: The power assist may fail intermittently. It might stop working during a drive and then return to normal after the car has been turned off and restarted. This can be a sign of an impending complete failure.
• Vibrations or Jerkiness: In some cases, the steering wheel may vibrate or feel jerky when turning as the motor struggles to provide consistent assistance.

Known Issues, Recalls, and Technical Service Bulletins (TSBs)

As of mid-2024, there are no specific recalls or Technical Service Bulletins (TSBs) from the National Highway Traffic Safety Administration (NHTSA) that directly address widespread failure of the power steering assist motor for the 2017-2018 Mazda 3. Searches for recalls primarily point to issues with other models or different components. However, forum discussions indicate that individual failures do occur, typically presenting as the symptoms listed above. Always check for the latest recall information using your vehicle's VIN on the official Mazda or NHTSA websites.

Buying a Used 2017-2018 Mazda 3 Power Steering Motor

A used OEM power steering motor can be a cost-effective and reliable alternative to an expensive new unit. Since this is an electronic component, the inspection process is different from that of a purely mechanical part.

• Verify Part Numbers: This is the most critical step. Match the part number from your original motor to the used unit. The primary compatible numbers are BABT-67-88ZA and BADK-67-88ZA, which supersede earlier versions. Ensure the donor vehicle had the same options (no i-Eloop, no active grille shutters).
• Inspect Connectors: Carefully examine all electrical connectors on the motor and its integrated control module. Look for any signs of corrosion, bent pins, or damage to the plastic housings. A clean, undamaged connector is essential for proper function.
• Check for Physical Damage: Inspect the motor housing and mounting points for any cracks, dents, or signs of impact. While it's located inside the cabin, damage can occur during removal from the donor vehicle.
• Mileage Considerations: Unlike hydraulic pumps that wear out mechanically, these electric motors do not have a typical failure mileage. Failure is usually due to an internal electronic fault rather than wear. A lower-mileage part is generally preferable, but the part's condition and correct part number are more important than mileage alone.
• Why Used OEM is a Good Choice: Used OEM motors are guaranteed to have the correct fitment and electronic compatibility for a plug-and-play installation, provided the part number is correct. New aftermarket units can sometimes have issues with software or require complex programming that a used OEM part avoids.

Replacement Overview & Calibration

Replacing the power steering assist motor is a moderately difficult job that involves working under the dashboard in a tight space.

The general process involves removing the lower dash panels, detaching the steering shaft from the motor assembly, unbolting the motor from its mounting points on the column, and disconnecting the electrical harnesses. Installation is the reverse of removal.

Calibration Requirements: After the new motor is installed, a steering angle sensor calibration may be required. This procedure ensures the stability control and other safety systems know the exact position of the steering wheel. Some systems may self-calibrate by turning the wheel from lock-to-lock with the engine running. However, in many cases, a diagnostic scan tool is needed to perform the calibration correctly. 🎬 See how to reset the Mazda steering position sensor Failure to calibrate the sensor can result in a persistent power steering warning light or malfunctioning stability control.

Cost of Replacement: 2017-2018 Mazda 3 Power steering Motor

Prices can vary based on location and supplier. The following is an estimated cost breakdown:

Frequently Asked Questions (FAQ)