2022-2025 Mazda CX-5 Electric Power Steering Failure: Diagnosis and Replacement
This guide details the symptoms, causes, and repair process for the electric power steering motor, helping you distinguish a true failure from other common steering noises.
- This is an electric power steering (EPS) motor mounted on the steering column, not a hydraulic pump. There is no fluid to check or leak.
- The most common failure symptoms are a sudden loss of steering assist (heavy steering) and a steering wheel warning light on the dash.
- After replacing the motor, calibration of the steering angle sensor with a professional scan tool is mandatory for the system to function and for safety systems like stability control to work correctly.
- A used OEM motor (part number KSD5-67-88ZA) can save over $1,000 compared to a new dealer part, but ensure you are buying the motor/module unit, not the entire column.
Understanding the 2022-2025 CX-5 Electric Power Steering System
A critical point for owners and technicians to understand is that the 2022-2025 Mazda CX-5 does not have a traditional hydraulic power steering pump. The entire system is electric. The core component is the power steering assist motor, which is physically attached to the steering column behind the dashboard. This design improves fuel efficiency because it only draws electrical power when steering assistance is needed, unlike a hydraulic pump that runs constantly. When this unit fails, the symptoms are electrical and mechanical, not hydraulic—you will not find any fluid leaks.
Symptoms of a Failing Power Steering Motor
Failure of the EPS motor or its control module is typically sudden and obvious. Here are the most common signs:
- Sudden Heavy Steering: This is the primary symptom. The steering wheel will become extremely difficult to turn, especially when parking or driving at low speeds. This happens because the electric motor has stopped providing assistance, leaving you with purely manual steering effort. The change can be intermittent at first but usually becomes a permanent failure.
- Power Steering Warning Light: When the system detects a fault, a warning light shaped like a steering wheel with an exclamation mark will illuminate on the instrument cluster. This is the vehicle's way of telling you the EPS system has been disabled for safety reasons.
- Buzzing or Grinding Noises: In some cases, a failing motor may produce a buzzing, whirring, or grinding sound from the steering column area under the dashboard while turning. This is distinct from suspension clunks or engine bay noises.
- Intermittent Assist / Jerky Steering: The steering assist may cut in and out, or feel jerky and uneven, which can point to a failing torque sensor or a problem within the motor's control unit.
Pro Tip: A weak or failing vehicle battery can cause a variety of electrical issues, including intermittent power steering problems. Before assuming the expensive EPS motor has failed, it's wise to have your battery and charging system tested, especially if you've experienced other electrical glitches.
Known Issues, TSBs, and Recalls
As of mid-2024, there are no active safety recalls specifically for the electric power steering motor on 2022-2025 Mazda CX-5 models in the North American market. However, it's important to be aware of other steering-related issues that can be misdiagnosed as a failing motor.
- TSB for Steering Wheel Vibration: Technical Service Bulletin 06-003-20-3718 was issued for some earlier models that could develop a rotational vibration in the steering wheel when not being held.
- TSB for Steering Shimmy: TSB SA-013-24 notes that some 2024 models may exhibit a steering shimmy caused by flat spots on the tires from sitting, which is not a mechanical fault.
- CX-90 Steering Recall (Context): Mazda issued a recall (NHTSA 24V-022) for the 2024 CX-90 due to an issue within the steering gear assembly that could cause a sudden increase in steering effort. While this involves a different vehicle, it highlights a recent sensitivity in Mazda's EPS supply chain.
Buying a Used Power Steering Motor (KSD5-67-88ZA)
Given that a new OEM motor costs over $1,200, a used OEM unit is an excellent value. However, there are critical details to be aware of when buying a recycled part.
Warning: The part number KSD5-67-88ZA refers specifically to the electric motor and its attached control module. It does NOT include the steering column, clock spring, or steering angle sensor. Always verify with the seller exactly what is included in the sale.
- Verify the Part Number: You must match the OEM part number KSD5-67-88ZA (or KSD56788ZA) exactly. While motors from other Mazda models may look similar, they are not interchangeable.
- Physical Inspection: When you receive the part, carefully inspect the electrical connectors for any bent, broken, or corroded pins. Check the motor housing for cracks or signs of impact damage. Since this is an electronic part, the external condition is a good indicator of its history.
- Mileage Considerations: Unlike a hydraulic pump, an EPS motor does not have the same kind of mechanical wear from fluids and belts. Failure is typically electronic. While lower mileage is always preferable, a high-mileage unit that is confirmed to be in good working order can still be a reliable replacement.
- Why Used OEM is a Good Choice: For a component this new, there are no established aftermarket or remanufactured options available. A used OEM motor is a factory-engineered part that is guaranteed to fit and function correctly, provided it is in good condition.
Replacement Procedure and Calibration
Replacing the EPS motor is an advanced DIY job that requires precision and adherence to safety procedures. If you are not comfortable with the steps below, this job is best left to a professional technician.
Step-by-Step Overview
- Safety First: Disconnect the negative battery terminal and wait at least 15 minutes to allow the airbag system to discharge. This is a critical safety step.
- Interior Disassembly: Remove the lower dash panels, driver-side scuff plate, and trim pieces to gain access to the steering column.
- Airbag and Steering Wheel Removal: Carefully remove the driver's airbag module. 🎬 See this steering wheel airbag removal walkthrough With the wheels pointing straight ahead, remove the main steering wheel nut and use a steering wheel puller to remove the wheel. Do not hammer on the steering shaft.
- Column Component Removal: Remove the steering column shrouds, clock spring, and combination switch (wiper/headlight stalks). Disconnect all related electrical connectors.
- Column Removal: Support the steering column, then remove the intermediate shaft pinch bolt in the driver's footwell. Finally, unbolt the main mounting nuts holding the column to the dash support and carefully lower the entire assembly out of the vehicle.
- Motor Swap: With the column on a workbench, you can now unbolt the old EPS motor (KSD5-67-88ZA) and install the replacement unit.
- Reassembly and Torque: Install is the reverse of removal. Ensure all bolts, especially the main column mounting nuts and intermediate shaft bolt, are torqued to the manufacturer's specifications found in the official service manual.
Mandatory Post-Replacement Calibration
Critical Step: After the new motor is installed and the battery is reconnected, the system MUST be calibrated. The steering angle sensor's neutral position needs to be learned by the vehicle's computer. This procedure requires a professional-grade diagnostic scan tool. 🎬 Watch: How to perform a steering angle sensor calibration Skipping this step will result in a persistent power steering warning light and may disable the traction and stability control systems.
Cost of Replacing the Power Steering Motor
The cost can vary significantly depending on whether you use new or used parts and perform the labor yourself.
| Part/Service | Estimated Cost | Notes |
|---|---|---|
| New OEM Motor (KSD5-67-88ZA) | $1,150 - $1,400 | Price from online Mazda dealers, MSRP is higher. |
| Used OEM Motor | $200 - $450 | Price from online salvage marketplaces like eBay. |
| New Aftermarket / Remanufactured | Not Available | Due to the vehicle's age, these options are not yet on the market. |
| Shop Labor | $250 - $450 | Represents 2.5-4 hours of labor, plus the cost of calibration. |
Frequently Asked Questions (FAQ)
Can I drive my CX-5 if the power steering fails?
Yes, but with extreme caution. The vehicle will still steer, but it will require significantly more physical effort, especially in parking lots or during sharp, low-speed turns. This can be dangerous in an emergency maneuver. It is recommended to have the vehicle repaired as soon as possible.
Do I need to bleed the power steering system after replacement?
No. The 2022-2025 CX-5 has a fully electric system and uses no power steering fluid, so no bleeding is required.
Is the steering angle sensor included with the motor?
No. The steering angle sensor is typically part of the clock spring/combination switch assembly, which is a separate component from the EPS motor (KSD5-67-88ZA). However, after replacing the motor, the existing sensor must be recalibrated.
My steering makes a clunking noise. Is it the power steering motor?
Not necessarily. A common cause for a clunking or knocking noise from the steering column area on CX-5s is a loose intermediate shaft pinch bolt, located in the driver's footwell. This is a much simpler and cheaper fix to investigate before assuming the entire EPS motor has failed.
Helpful Videos
Technical Specifications
OEM Part Numbers: KSD5-67-88ZA KSD56788ZA
Column-mounted Electric Power Assist Motor with integrated Power Steering Control Module (PSCM).
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.
- Mazda CX-5:
- 🎬 Helpful Videos
- Understanding the 2022-2025 CX-5 Electric Power Steering System
- Symptoms of a Failing Power Steering Motor
- Known Issues, TSBs, and Recalls
- Buying a Used Power Steering Motor (KSD5-67-88ZA)
- Replacement Procedure and Calibration
- Step-by-Step Overview
- Mandatory Post-Replacement Calibration
- Cost of Replacing the Power Steering Motor
- Frequently Asked Questions (FAQ)
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