Guide to 2001-2006 Mitsubishi Eclipse Front Control Arm & Ball Joint Assembly
Stop front-end clunks and fix steering wander on your 3rd Generation Eclipse with the right replacement parts.
- A clunking noise over bumps is the most common symptom of a failing control arm on the 3G Eclipse.
- A wheel alignment is mandatory after replacement to prevent unsafe handling and rapid tire wear.
- While replacing the arms, thoroughly inspect the front subframe for rust, a known issue on similar Mitsubishi platforms.
- Replacing control arms in pairs (left and right) is highly recommended for balanced performance and safety.
Is Your Eclipse Making Noise? Recognizing a Failing Control Arm
When a control arm or its components wear out on your 2001-2006 Eclipse, the symptoms are hard to ignore. The bushings crack and the ball joint loses its grease and develops play. This leads to several distinct problems you can hear and feel while driving.
- Clunking or Knocking Sounds: This is the most common sign. You'll hear a heavy clunk or pop from the front end when you drive over bumps or potholes. This is the sound of the loose ball joint or worn bushings allowing metal-to-metal contact.
- Steering Wander: The car may feel like it has a mind of its own, pulling to one side and requiring constant small steering corrections to stay straight. This happens because the worn parts can no longer hold the wheel in the correct alignment.
- Vibrations: You might feel a shimmy or vibration in the steering wheel, especially at highway speeds. This is caused by the wheel wobbling due to a loose connection at the control arm.
- Uneven Tire Wear: A bad control arm assembly will ruin your wheel alignment. Check your front tires for excessive wear on the inside or outside edge, a classic sign that the wheel isn't being held straight.
A Note on Front Crossmember Corrosion
While there are no specific recalls for the control arms on the 2001-2006 Eclipse, it's important to be aware of a related issue. Other Mitsubishi models of a similar era were recalled for severe rust on the front crossmember (the subframe that the control arms bolt to). This corrosion can become so bad that the control arm mounting point can break off, leading to a loss of vehicle control. When replacing your control arms, it is critical to inspect the subframe for significant rust, especially if you live in an area where road salt is used.
Choosing the Right Aftermarket Control Arm
Since the ball joint is integrated into the arm on the 3G Eclipse, you will be replacing the entire assembly. Aftermarket brands offer a range of quality and price points. Here’s how they generally stack up based on owner and mechanic feedback.
Brand Quality Tiers
- Premium Brands (Moog, Mevotech Supreme): Moog is a well-regarded name in suspension parts, often seen as a top-tier choice. Mevotech's "Supreme" line is also designed to meet or exceed OE specifications and often comes with a lifetime warranty. These brands may feature enhancements over the original design for increased durability.
- OEM-Equivalent Brands (Beck Arnley, Delphi): These brands focus on providing a direct replacement that matches the fit and function of the original factory part. Beck Arnley is known for sourcing parts from OEM manufacturers, and many mechanics trust their quality. Delphi is also a respected OEM supplier for many carmakers.
- Value Brands (Dorman, base-line Mevotech): Dorman offers a budget-friendly option and is widely available. However, some user experiences suggest that the quality of their rubber components, like ball joint boots, may not be as durable as premium brands or OEM parts, potentially leading to a shorter lifespan. These are a viable choice for a quick repair on a budget, but may not last as long as higher-priced options.
Pro Tip: It is highly recommended to replace control arms in pairs (both driver and passenger side). If one side has failed due to age and wear, the other side is likely not far behind. Replacing both at the same time ensures balanced handling and saves you from doing the same job twice.
🎬 Watch a complete step-by-step guide to rebuilding your Eclipse's suspension.Cost to Replace a 2001-2006 Eclipse Control Arm
The cost can vary based on your location and the parts you choose. The table below gives a general estimate.
| Part/Service | Estimated Cost |
|---|---|
| New Aftermarket Assembly | $56.00 - $129.98 |
| New OEM Assembly | $200 - $500+ per side |
| Shop Labor | $163 - $240 per side |
| Total Professional Replacement (Aftermarket Part) | $220 - $370 per side |
| Wheel Alignment (Required) | $80 - $150 |
Frequently Asked Questions
Do I need a wheel alignment after replacing a control arm?
Yes, absolutely. Replacing a control arm will always change the wheel alignment. You must get a professional four-wheel alignment immediately after the repair to ensure your Eclipse drives straight, handles safely, and doesn't destroy your tires.
Can I just replace the ball joint or bushings?
On the 2001-2006 Eclipse, the front lower ball joint is permanently installed into the control arm. Therefore, you must replace the entire control arm and ball joint assembly. While the frame-side bushings can sometimes be pressed out and replaced, it is often more time- and cost-effective to replace the complete assembly which comes with new bushings already installed.
How difficult is this job for a DIY mechanic?
This job can be challenging. It requires safely lifting and supporting the vehicle, and you may need special tools like a ball joint separator. The biggest obstacle is often seized or rusted bolts, particularly the large bolts that hold the arm to the subframe. In some cases, these bolts must be cut out, requiring replacement hardware.
🎬 See how a DIY mechanic handles a full suspension overhaul.What is the most common mistake when ordering this part?
The front lower control arms are specific to the driver's side and passenger's side, so ensure you order the correct one. Also, be aware that these parts are shared with the 2001-2005 Dodge Stratus Coupe and Chrysler Sebring Coupe, but they do NOT fit the sedan or convertible versions of those cars, which have a different suspension design.
Helpful Videos
Technical Specifications
OEM Part Numbers: MR403441 MR403442 MR491303 MR491304 MR554033 MR554034
This is a one-piece, non-serviceable assembly that includes the lower control arm, a pre-installed ball joint, and two pre-installed rubber bushings for mounting to the subframe. It is designed for the MacPherson strut front suspension on the 2001-2006 Mitsubishi Eclipse.
We Have This Part in Stock
The information in this article is provided for general reference and educational purposes only. Vehicle specifications, procedures, and part compatibility can vary by production date, trim level, and region. Always consult your vehicle's factory service manual and verify part numbers before purchasing or performing repairs. Safety-critical components such as airbags, seat belts, and braking systems should be installed by a qualified professional.
- Mitsubishi Eclipse: