2022-2025 Mazda CX-5 Steering Column: Diagnosing Noises, EPS Faults, and Replacement

Known Issues: TSB for Steering Column Noise

A widely reported issue for the Mazda CX-5 (including 2022-2023 models) is a creaking, knocking, rattling, or clunking noise coming from the steering column area, especially when driving over bumps or irregular roads. Some owners feel this noise as a slight pop or looseness through the steering wheel.

Mazda has addressed this with Technical Service Bulletin (TSB) 06-001/24. According to the TSB, the root cause is a steering column nut that can loosen over time due to road vibrations. While simply re-tightening the nut might seem like a solution, Mazda's official repair procedure for a confirmed issue under warranty involves replacing the entire steering column assembly with a modified part and using an increased torque specification to prevent the problem from recurring.

Symptoms of a Failing Steering Column or EPS System

Failures can manifest as mechanical noises or as problems with the electric power steering system. Here are the most common symptoms:

• Power Steering Warning Light: The most obvious sign is the illumination of the power steering warning light on your dashboard, which looks like a steering wheel with an exclamation mark. This indicates the vehicle's computer has detected a fault in the EPS system.
• Sudden Heavy or Stiff Steering: The primary symptom of an EPS motor failure is a sudden loss of steering assist. The steering will feel extremely heavy and difficult to turn, especially at low speeds or when parking. The vehicle is still steerable, but it requires significantly more physical effort.
• Intermittent Steering Assist: The power steering may work intermittently, cutting in and out. This can be particularly dangerous if it happens mid-turn. This often points to an electrical issue, like a poor connection or failing sensor.
• Vibrations or Jerking in the Steering Wheel: A failing EPS system can cause the steering wheel to jerk or vibrate during turns.
• Whining or Grinding Noises: A faint whining or grinding sound from the dashboard area when turning the wheel can indicate the internal electric motor is failing.

How to Diagnose the Problem

1. Check Battery Voltage First: The EPS system draws a significant amount of electrical current. Low battery voltage or a weak alternator is a very common cause of EPS warning lights and intermittent failures. Before condemning the steering column, ensure your battery reads at least 12.4 volts with the engine off and that the charging system produces 13.8-14.4 volts with the engine running.
2. Scan for Fault Codes: A modern OBD-II scanner that can read chassis codes (C-codes) is essential. The EPS module will store specific fault codes that can pinpoint the problem, such as a faulty torque sensor, motor circuit failure, or loss of communication.
3. Perform a Reset: Sometimes, a temporary glitch can be cleared. Try turning the steering wheel fully to the left, then fully to the right, and back to center with the engine running. If the light persists, a battery reset (disconnecting the negative terminal for 15-30 minutes) can force the module to reboot. Note that this will require re-initializing the steering angle sensor.

Buying a Used Steering Column: What to Look For

Given the high cost of a new OEM steering column, a quality used unit from a reputable recycler is an excellent value. Here’s what to consider:

• Verify the Part Number: Compatibility is critical. The primary OEM part number for the 2022-2025 CX-5 is KSD5-67-88ZA (or KSD56788ZA). Always match this number exactly. Using the wrong column can lead to communication errors with other vehicle modules. Verify with the seller using your vehicle's VIN.
• Inspect for Damage: Physically inspect the used column. Look for any signs of impact damage, bent shafts, or cracks in the housing. Pay close attention to the electrical connectors; they should be clean, with no corrosion or bent pins.
• Source Vehicle History: Whenever possible, choose a part from a vehicle with low mileage that was involved in a rear or side collision. Avoid parts from flood-damaged vehicles, as water can destroy the sensitive electronics inside the EPS motor and control module.
• Why Used OEM is a Smart Choice: For a complex electronic part like this, a used OEM column is often superior to a new, cheap aftermarket alternative. The OEM unit was designed to integrate perfectly with your Mazda's systems, ensuring the steering angle sensor and other functions work as intended. Aftermarket units can sometimes have software or hardware incompatibilities that create new, hard-to-diagnose problems.

Replacement and Calibration Requirements

Replacing the steering column is an advanced procedure and is not recommended for most DIY mechanics.

• Safety First: The process requires removing the driver's airbag and steering wheel. Improper handling of the airbag can be extremely dangerous. The battery must be disconnected and the system allowed to discharge before beginning work.
• Specialized Procedure: The job involves removing lower dash panels, disconnecting multiple electrical connectors, and unbolting the intermediate shaft and the column mounting brackets.
• Mandatory Calibration: After the new column is installed or if the battery has been disconnected for an extended period, the Steering Angle Sensor (SAS) must be initialized. This process tells the car's computer the steering wheel's center position. Without proper calibration, the power steering may not work correctly, and safety systems like Electronic Stability Control (ESC) and Lane-Keep Assist will be disabled. While a simple lock-to-lock procedure sometimes works, a professional-grade scan tool is often required to perform the calibration correctly.

Cost Comparison

The cost to replace a steering column can vary significantly. The part itself is the largest expense when buying new.

Frequently Asked Questions (FAQ)