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Rust on Rear Wheel Wells and Rocker Panels - 2016 Ford Fusion SE

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Chris P. · rep 0 · May 25, 1:37 AM · 1 replies · solved · Question

Vehicle: 2016 Ford Fusion SE

Hi everyone,

I'm starting to get concerned about some rust spots appearing on my 2016 Ford Fusion SE. It's the 2.5L model, and I've owned it since new. I live in a region that uses a lot of road salt in the winter, and it's definitely taking its toll.

Specifically, I'm seeing bubbling paint and some surface rust starting on the rear wheel arches, right where the fender meets the bumper, and also along the bottom of the rocker panels. It's not severe yet, but I want to address it before it gets worse and becomes a structural issue.

Is this a common problem for Fusion models of this generation? What are my options for repair, and what should I look for in terms of a professional repair shop? I'm trying to decide if it's something I can tackle with a DIY kit or if it needs professional bodywork.

✓ Accepted solution

ClearTheCode Admin

ClearTheCode Team · rep 0 · May 25, 1:37 AM

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ClearTheCode admin answer:

Rust on rear wheel wells and rocker panels is a common concern for vehicles, especially those in regions that experience harsh winters and heavy road salt use. Your 2016 Ford Fusion SE is at an age where these issues can begin to manifest.

  1. Common Causes:

    • Road Salt Exposure: This is the primary culprit. Salt accelerates corrosion, especially when trapped in crevices or behind plastic trim.
    • Paint Chips and Scratches: Minor damage to the paint allows moisture and salt to penetrate the metal, starting the rust process.
    • Poor Drainage: Areas where water and debris can accumulate (like the inside lip of wheel wells or behind rocker panel covers) are prone to rust.
    • Design Vulnerabilities: Some vehicle designs inadvertently create pockets where moisture and salt can sit.

  2. When to See a Shop:

    • Early Stage (Surface Rust/Bubbling Paint): If it's just surface rust or small paint bubbles, a skilled DIYer might be able to tackle it, but professional repair will yield a much better, longer-lasting result.
    • Advanced Stage (Perforation/Large Areas): If the metal is perforated, or if the rust covers a significant area, professional bodywork is essential. This often involves cutting out rusted sections and welding in new metal.

  3. Recommended Steps:

    • Immediate Action: Clean the affected areas thoroughly, removing any loose rust or paint. Apply a rust converter product temporarily to halt further progression if you can't get it repaired immediately.
    • Professional Assessment: Get estimates from reputable body shops specializing in rust repair. They can assess the extent of the damage (which might be worse than it appears on the surface) and provide options.
    • Repair Options:
      • Surface Rust: Sanding, rust treatment, primer, paint, and clear coat.
      • Minor Perforation: Cutting out the rusted section, welding in a patch panel, body filler, primer, paint, and clear coat.
      • Preventative Measures: After repair, consider applying undercoating or rust-proofing treatments to the vulnerable areas, especially if you live in a salt-heavy region. Regular washing, particularly the undercarriage, is crucial.
    • Check for TSBs/Recalls: While less common for general rust, occasionally manufacturers issue TSBs for specific corrosion issues. It's worth a quick check with a Ford dealer using your VIN, though it's unlikely to be covered under warranty at this age unless it's a known manufacturing defect.
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