2017-2025 Mazda CX-5 Steering Rack: Diagnosing Clunks, Noises, and AWD vs. FWD Fitment

Symptoms of a Failing Steering Rack

A problem with the steering rack can manifest in several ways. Because the CX-5 uses an electric system, you will not see the fluid leaks that are common in older hydraulic systems. Instead, listen and feel for these specific symptoms.

Clunking, Clacking, or Knocking Noises

This is the most reported symptom for this part. The sounds can have a few different causes:

• Clacking at Full Lock: A specific "clacking" sound that only happens when starting to move with the steering wheel turned all the way to one side (usually the driver's side) is a known issue addressed by a Technical Service Bulletin (TSB). The noise is caused by the inner ball joint making contact with the steering gear housing.
• Clunking Over Bumps: A clunking or rattling noise from the front end, sometimes feeling like it's under the dashboard, can be caused by a loose intermediate steering shaft bolt inside the cabin. This is often misdiagnosed as a suspension issue.
• General Knocking/Creaking: Worn internal gears or bushings inside the steering rack can cause grinding, creaking, or knocking sounds, especially when turning the wheel at low speeds.

Loose or Vague Steering

If the steering feels sloppy, has excessive play, or the vehicle wanders on a straight road, it can indicate wear within the steering rack's internal components. You might feel a "dead spot" when you begin to turn the wheel where the car doesn't respond immediately.

Difficulty Steering or Uneven Assist

While less common, a failure in the electric power steering motor or sensors can cause the steering to feel unusually heavy or difficult to turn. You might also notice that it's easier to turn in one direction than the other. This indicates a problem with the power assist unit integrated into the rack.

Known Issues, TSBs, and Recalls

While there are no major recalls for the steering rack itself on the 2017-2025 CX-5, Mazda has issued Technical Service Bulletins (TSBs) for specific noise-related concerns.

• TSB 06-001/19: Addresses a "clacking" noise from the front of the vehicle when starting from a stop with the steering wheel fully turned. The fix involves installing a spacer between the inner ball joint and the steering gear housing.
• TSB 06-004/23: This bulletin addresses a creaking, knocking, or clunking noise coming from the steering column area while driving. The cause is identified as a steering column nut that can loosen over time. The repair involves replacing the steering column assembly with a modified part with a higher torque specification.
• Loose Intermediate Shaft Bolt: While not an official TSB, a widely reported issue that mimics a bad steering rack is a loose bolt on the intermediate steering shaft, located inside the cabin near the driver's footwell. 🎬 Watch: How to fix a steering rattle over bumps Tightening this bolt can often resolve clunking noises over bumps.

Buying a Used 2017-2025 CX-5 Steering Rack

A used OEM steering rack can be a cost-effective solution compared to a new part. Since this is an electric unit, the primary concerns are physical damage and wear, not hydraulic leaks. Here’s what to inspect:

• Check the Bellows Boots: The flexible rubber boots on each end of the rack are critical. Inspect them carefully for any rips, tears, or pinholes. A damaged boot allows dirt and water to enter the rack, which will quickly destroy the internal gearing and inner tie rod joints.
🎬 See this guide to locating front end clunking noises
• Inspect the Housing: Look for any cracks, dents, or signs of heavy impact on the main aluminum housing of the rack. An accident can cause damage that isn't immediately obvious.
• Test the Inner Tie Rods: Grab the inner tie rod (the metal rod coming out of the boot) and try to move it in and out and up and down. There should be no free play or clunking. Some resistance to movement is normal, but looseness indicates wear.
• Verify Part Numbers: Double-check that the part number on the used rack matches the OEM number required for your vehicle's specific year and drivetrain (AWD or FWD).
• Mileage Consideration: Steering racks typically last well over 100,000 miles. A part from a lower-mileage vehicle (under 75,000 miles) is always preferable, as it has experienced less wear and tear on its internal components.

Replacement and Calibration

Replacing the steering rack on a CX-5 is a complex job that is not recommended for beginner DIY mechanics. The process involves supporting the engine and lowering the front subframe to gain access.

Steering Angle Sensor (SAS) Calibration

After the steering rack is replaced or the battery has been disconnected, the Steering Angle Sensor may need to be calibrated. This sensor tells the car's computer the exact position of the steering wheel, which is critical for systems like stability control and adaptive headlights. In many cases, this can be done without a special scan tool by following a simple procedure:

1. Turn the ignition to the 'ON' position (do not start the engine).
2. Slowly turn the steering wheel all the way to the right lock.
3. Slowly turn the steering wheel all the way to the left lock.
4. Return the steering wheel to the center position.
5. Turn the ignition off. This should complete the reset.
🎬 Watch: A visual guide to calibrating the steering angle sensor

If warning lights for systems like AFS (Adaptive Front-lighting System) or SCBS (Smart City Brake Support) appear after replacement, a professional scan tool may be needed to perform the calibration.

Cost Comparison

Frequently Asked Questions (FAQ)