Identify the Cause of the Steering Vibrations

• Begin by understanding when the steering wheel vibrations occur. Note whether they happen when the car is idling, accelerating, or when applying the brakes.
• Check if the vibrations are related to speed. Does it intensify with increased speed or while turning the steering wheel?

Inspect Tires and Wheels

• Examine all tires for uneven tread wear, which can significantly contribute to vibrations. If uneven wear exists, you may need a wheel alignment or tire replacement.
• Ensure that all tires are properly balanced. Wheel imbalance is a common cause of steering vibrations, especially at higher speeds.
• Look for any visible deformities in the tires, such as bulges or flat spots, which might require tire replacement.
• Check the rims for damage, such as bends or cracks. Damaged wheels should be repaired or replaced.

Inspect Suspension and Steering Components

• Assess the condition of the suspension system. Worn out ball joints or tie rod ends can cause steering vibrations and should be replaced if necessary.
• Inspect struts and shocks for leaks or damage. These components help absorb road impacts, and wear can lead to vibrations.
• Check the wheel bearings for wear. A worn wheel bearing can cause noticeable vibrations and noise.

Examine Brake System

• If vibrations occur during braking, the brake rotors could be warped. Inspect the rotors for warping and resurface or replace them if needed.
• Consider checking the brake pads and calipers for proper installation and wear, as these can affect the rotors and cause vibrations.

Powertrain Check

• If the vibrations occur when accelerating, inspect the axles or the CV (constant velocity) joints, as worn out components here can lead to vibrations.
• Transmission and engine mounts can also contribute to vibrations if they are worn or damaged, so check these parts as well.

Professional Diagnosis

• If you cannot identify or rectify the cause of the vibrations using the above steps, it might be prudent to go to a professional mechanic. They can provide a complete diagnosis and fix the issue correctly.

Routine Maintenance

• Remember to balance and rotate tires regularly as part of routine maintenance to prevent steering vibrations.
• Get regular vehicle alignments to ensure all components are correctly aligned and working effectively together.

Following these steps will assist in fixing steering vibrations in a 2002–2006 Nissan Altima, ensuring smooth and safe driving conditions.