2018-2026 Mitsubishi Eclipse Cross Inner Fender Liner: Noises, Damage, and Replacement Guide

Symptoms of a Bad or Missing Inner Fender Liner

Failure of an inner fender liner is almost always due to physical damage. Since it's a non-moving plastic part, the symptoms are usually easy to hear and see.

• Scraping or Rubbing Noises: The most common symptom is a scraping, rubbing, or grinding noise, especially during turns. This happens when a piece of the liner breaks loose and makes contact with the spinning tire.
• Flapping Sounds at Speed: If the plastic clips or screws holding the liner in place break, the liner can come loose and flap in the wind at highway speeds. This creates a loud, distracting noise.
• Visible Damage: A visual inspection will often reveal the problem. Look for cracks, large holes, or sections of the liner that are hanging down or missing entirely. This damage often occurs after hitting a curb, large pothole, or road debris.
• Debris in Engine Bay: If you notice an unusual amount of dirt, mud, or moisture in the engine bay, it could be a sign that a fender liner is compromised or missing, allowing road spray to get past it.

Known Issues, Recalls, and Service Bulletins for 2018-2026 Eclipse Cross

As of mid-2026, there are no specific recalls or widespread Technical Service Bulletins (TSBs) issued by Mitsubishi for the inner fender liners on the 2018-2026 Eclipse Cross. Failures are typically isolated incidents of physical damage rather than a design or manufacturing defect. While there are recalls for this generation of Eclipse Cross, such as one for the Forward Collision Mitigation (FCM) system software, none pertain to the body panels or liners. A TSB was issued in August 2023 (TSB-23-51-001) that corrected the service manual procedure for removing wheel arch moldings, but this is a documentation update for technicians, not a recall or repair campaign.

Buying a Used Inner Fender Liner: What to Look For

When buying a used inner fender liner, a careful physical inspection is key. Since this part is all about protection and fit, you want to ensure it's structurally sound.

Why Choose a Used OEM Liner?

For a part like this, a used Original Equipment Manufacturer (OEM) liner in good condition is often a better choice than a new aftermarket one. Aftermarket liners can be made from thinner, more brittle plastic that doesn't hold up as well. More importantly, they often suffer from poor fitment, with mounting holes that don't line up perfectly. This can create gaps that let in debris or cause the liner to rub against the tire—the very problem you're trying to solve. A used OEM part was designed by Mitsubishi for a perfect fit.

Inspection Checklist for a Used Liner

• Check All Mounting Points: Carefully inspect every hole where a clip or screw would go. Look for tears, cracks, or holes that have been ripped open. A liner with damaged mounting points will not install securely and will likely come loose.
• Look for Cracks and Holes: Scan the entire surface of the liner for any cracks or holes. A small crack might be acceptable, but large splits or missing chunks mean the liner can no longer do its job effectively.
• Assess for Brittleness: Gently flex the plastic. It should have some give. If it feels extremely stiff or brittle, it may be old and degraded from UV exposure and heat cycles, making it likely to crack during installation or from a minor impact.
• Signs of Tire Rubbing: Look for areas where the plastic is worn smooth or has melted grooves. This indicates the liner came from a vehicle with oversized tires or a suspension issue, but as long as the wear hasn't created a hole, the part is likely still usable.

Confirming Fitment: Part Numbers and Side-Specific Liners

The inner fender liners for the Mitsubishi Eclipse Cross are specific to the driver and passenger sides. It is critical to order the correct one for your needs. The rear liners are also different from the front.

Part numbers should always be verified against your vehicle's VIN. The initial part numbers 5370B809 and 5370B811 from the database correspond to the Rear Left and Front Left liners, respectively.

Replacement Overview

Replacing an inner fender liner is a straightforward job that is very feasible for a DIY mechanic. The process generally takes under an hour.

1. Gain Access: Park on a level surface. For best access, jack up the front corner of the car and remove the wheel. Always use jack stands for safety. You can sometimes do the job by just turning the steering wheel all the way to one side, but removing the wheel makes it much easier.
2. Remove Fasteners: The liner is held in place by a series of plastic push-clips and possibly a few screws. Use a trim removal tool or a flathead screwdriver to pry the center pin of the clips out, then pull the entire clip body out. Keep track of any screws.
3. Remove Old Liner: Once all fasteners are out, the liner can be wiggled and flexed to pull it out of the wheel well.
4. Install New Liner: Maneuver the new liner into position, making sure it tucks behind the fender lip and any underbody panels correctly. Align the mounting holes.
5. Secure New Liner: Install new clips and screws. It is highly recommended to use new plastic clips, as old ones become brittle and often break on removal or fail to hold securely when reused. Push the clip body into the hole, then press the center pin in to lock it.

Cost Comparison: New vs. Used vs. Aftermarket

Frequently Asked Questions (FAQ)