2014-2016 Mazda 6 Control Arm Guide: Clunks, Bushing Failures, and the 2016 Design Change

Symptoms of a Failing Control Arm

When the control arm on a 2014-2016 Mazda 6 fails, it's almost always due to the rubber bushings cracking or the integrated ball joint wearing out. This wear and tear produces distinct noises and handling issues that serve as clear warning signs.

Clunking or Knocking Noises

The most common symptom is a clunking, popping, or knocking sound from the front of the car. This noise is most obvious at low speeds when driving over bumps, pulling into driveways, or turning the steering wheel in a parking lot. The sound is caused by the worn-out components allowing metal-on-metal contact as the suspension moves.

Creaking or Squeaking Sounds

A creaking noise, especially in wet conditions or at speeds between 12-25 mph, can also indicate failing control arm bushings. This specific issue is so common that Mazda issued a Technical Service Bulletin (TSB) to address it. The sound comes from the worn rubber flexing and rubbing against its metal housing.

Steering and Handling Problems

A worn control arm can make the vehicle's steering feel loose, vague, or unstable. You might notice the car wanders or pulls to one side, requiring constant correction to drive straight. This happens because the worn bushings and ball joint can no longer hold the wheel in the correct alignment.

Vibrations and Uneven Tire Wear

As the components wear, vibrations from the road are no longer properly absorbed and can be felt through the steering wheel. A visual inspection of your front tires may reveal uneven wear, particularly on the inner or outer edges. This is a direct result of the wheel alignment being compromised by the loose control arm.

Known Issues, TSBs, and Recalls

While there are no direct safety recalls for the control arms themselves on the 2014-2016 Mazda 6, there are official service bulletins and a related recall you should be aware of.

TSB for Creaking Lower Arm Bushings

Mazda issued Technical Service Bulletin (TSB) 02-010/16 (later updated) for a creaking noise from the front lower arm bushings on 2014-2016 Mazda 6 models. The bulletin acknowledges that friction in the bushings can cause noise and outlines a repair procedure. This TSB confirms that the bushings are a known weak point.

The Critical 2016 Mid-Year Design Change

For 2016 models, it is crucial to know that Mazda changed the design of the control arm mid-year. Part listings show a cutoff date of November 1, 2015. This means a control arm from an early 2016 model may not fit a late 2016 model, and vice-versa. Before purchasing, it is essential to visually compare the replacement part to the one on your vehicle to ensure the shape and mounting points match.

Related Recall: Loose Front Strut Bolts

Safety Recall 9316D (NHTSA ID: 16V203) was issued for some 2014-2016 models because the bolts connecting the front strut to the steering knuckle could loosen. This can cause a rattling or clunking noise very similar to a bad control arm. Before assuming the control arm is the problem, it is critical to check that these two large bolts are present and properly tightened on both sides of the vehicle.

Buying a Used 2014-2016 Mazda 6 Control Arm

A used OEM control arm from a low-mileage vehicle can be an excellent value, offering better fit and material quality than many new, inexpensive aftermarket parts. Here’s what to look for.

• Check the Bushings: The large rubber bushings are the most common failure point. Inspect them closely for any cracks, tearing, or separation from the metal sleeve. A healthy bushing is solid and intact; a bad one will look dry-rotted and torn.
• Inspect the Ball Joint: The ball joint is integrated into the arm. Ensure its rubber boot is not ripped, torn, or leaking grease. Squeeze the boot to feel for any excessive play or looseness in the joint underneath.
• Verify Straightness: Look down the length of the arm to ensure it is not bent or twisted. Compare it to photos of a new part if you are unsure. Any deformation means the part was likely damaged in a collision and is unusable.
• Confirm Compatibility (Especially for 2016): Due to the mid-year design change, visually matching the part is non-negotiable for 2016 models. For all years, confirm the part is for the correct side (right/passenger or left/driver).
• Mileage vs. Condition: While lower mileage is always better, the condition of the bushings and ball joint is more important. A 70,000-mile part from a vehicle driven on smooth highways may be in better shape than a 50,000-mile part from a car driven on rough city streets. Failures are commonly reported starting around 90,000 to 100,000 miles.

Cost of Replacement

Replacing a control arm involves both parts and labor costs. An alignment is also required after the job is complete, adding to the total expense.

A dealership repair for one side could cost between $485 and $536, while having both front arms replaced could exceed $1,700. An independent shop using quality aftermarket or used OEM parts will typically be more affordable.

Replacement Overview & Special Procedures

Replacing the control arm is a feasible DIY job for someone with mechanical experience and the right tools. The general process involves safely lifting and supporting the vehicle, removing the wheel, and then unbolting the three connection points of the control arm: the two inner bushing bolts and the outer ball joint pinch bolt.

Key Torque Specs:

Always consult a factory service manual for the most accurate specs for your specific vehicle. However, general values are:

• Control Arm to Subframe Bolts (Front & Rear): 110 - 180 ft-lbs (sources vary, the front bolt is often higher).
• Ball Joint Pinch Bolt: ~40 ft-lbs.
• Wheel Lug Nuts: ~80 ft-lbs.

Frequently Asked Questions (FAQ)