2004-2010 Nissan Quest Rear Upper Control Arm: Fixing Clunks, Wobbles, and Tire Wear

Symptoms of a Failing Rear Upper Control Arm

When a rear upper control arm fails, it's almost always due to the rubber bushings at either end wearing out. These bushings crack, dry out, and develop excessive play, leading to several distinct symptoms.

1. Clunking or Knocking Noises

This is the most common and noticeable symptom. You may hear a distinct clunking, popping, or knocking sound coming from the rear of the vehicle. This noise is most apparent when driving over bumps, potholes, or uneven pavement. The sound is caused by the loose control arm moving around and making metal-to-metal contact with its mounting points. Some owners have described it as a "loud boom boom sound" coming from the rear driver or passenger side.

2. Uneven and Rapid Tire Wear

A worn control arm allows the wheel's alignment to shift out of specification. This will cause the rear tires to wear out unevenly and much faster than normal. Typically, you will see excessive wear on the inner or outer edge of the tire tread. If you've recently replaced your tires only to find them wearing out quickly, a bad control arm is a likely culprit.

3. Unstable Handling and Wandering

The vehicle may feel loose or unstable from the rear, especially at highway speeds or when changing lanes. You might find yourself making constant small steering corrections to keep the van driving straight. This feeling of wandering or pulling to one side occurs because the worn bushings allow the rear wheel to shift its position, affecting the vehicle's stability.

4. A 'Wobbly' or Vibrating Sensation

In some cases, a failing rear control arm can cause a feeling of a "wobble" from the rear of the vehicle while driving. You may also feel excessive vibrations through the floor or seats, as the worn bushings are no longer able to dampen road imperfections effectively.

Buying a Used Rear Upper Control Arm: What to Check

Since this part is a simple, non-electronic mechanical component, a high-quality, low-mileage used OEM arm can be an excellent value. However, careful inspection is key.

• Inspect the Bushings: The rubber bushings are the most critical inspection point, as they are the primary failure item. Look for any signs of cracking, tearing, dry rot, or separation of the rubber from the metal sleeve. Squeeze the rubber with your fingers; it should be firm and pliable, not hard and brittle. Avoid any arm with visible bushing damage.
• Check for Straightness: Lay the control arm on a flat surface to ensure it is not bent or twisted. A bent arm will make a proper wheel alignment impossible. Any sign of a bend means the part was likely involved in a collision and should be rejected.
• Examine for Corrosion: Check the arm for heavy rust or corrosion, especially around the welds and bushing housings. While surface rust is normal, deep, flaky rust can weaken the part's structural integrity.
• Verify Part Numbers: The left (driver side) and right (passenger side) arms are different and not interchangeable. Confirm you are buying the correct part for the side you need to replace. The OEM part number is often stamped or labeled on the arm.

Cost of Replacing a Rear Upper Control Arm (2004-2010 Quest)

The total cost depends on the type of part you choose and whether you perform the labor yourself. A wheel alignment is a mandatory additional cost.

Replacement Overview and Difficulty

• Difficulty Rating: 3 out of 5
• Estimated Time: 1.5 - 2.5 hours per side
• DIY Feasible: Yes, for those with mechanical experience and proper tools.

Replacing the rear upper control arm is a manageable job for an experienced DIY mechanic. The basic process involves safely lifting and supporting the vehicle, removing the rear wheel, and unbolting the control arm from the subframe and the steering knuckle. Rusted bolts can be a challenge, so using penetrating oil beforehand is highly recommended. It is critical that the final tightening of the main pivot bolts is done with the vehicle's full weight on the suspension (i.e., on the ground or on ramps) to prevent premature bushing failure.

Known Issues, Recalls, and TSBs

There are no specific recalls or Technical Service Bulletins (TSBs) issued by Nissan or the NHTSA for the failure of the rear upper control arms on the 2004-2010 Nissan Quest. Failures are typically considered a normal wear-and-tear item. While other suspension recalls exist for the Quest and similar Nissan models, they do not apply to this specific part.

Part Numbers and Compatibility

It is crucial to get the correct part for the specific side of the vehicle.

Note: While some catalogs only list the left side part up to 2009, it is highly probable it also fits the 2010 model, as the right side part and vehicle platform remained unchanged. The number 55502-CK001 is a later revision and is interchangeable with 55502-CK000.

Frequently Asked Questions (FAQ)