Quarter Panel

Quarter Panel Replacement & Technical Guide

Quarter panels are the unsung heroes of vehicle structure and style, forming the rear side bodywork between the door and trunk. They absorb impacts, define the car's silhouette, and anchor critical components like the fuel filler and rear suspension mounts. Whether you're restoring a classic or repairing collision damage, understanding quarter panels is vital for both aesthetics and safety.

Most vehicle owners don't realize that even minor dents or rust in the quarter panel can compromise structural integrity and resale value. According to industry data, over 40% of collision repairs involve quarter panel work, yet many overlook the hidden risks of improper repair—such as misaligned suspension geometry or water leaks. Unaddressed quarter panel issues can also affect the fitment of adjacent parts like the Air Box/Air Cleaner and rear lighting assemblies.

The best solution is a professional-grade replacement or repair using OEM-spec quarter panels, proper welding or bonding techniques, and corrosion protection. AutoPartEx offers a curated selection of quarter panels for a wide range of makes—including AMC, Acura, and Alfa—with detailed fitment data. Pair your quarter panel replacement with related parts like the AC Condenser and AC Condenser Fan for a comprehensive repair that restores both appearance and structural performance.

Filters & Navigation

Change Category

Filter Quarter Panel Products

Make

Model

Year

State

City

Price Range

Condition

Showing 0 of 0 products

No Products Found

Try adjusting your filters or click "Clear All" to start over.

Complete Quarter Panel Technical Reference

Quarter Panel Construction and Materials

Quarter panels are typically stamped from high-strength steel or, in some modern vehicles, aluminum or composite materials. They are designed to absorb side impacts and provide a mounting surface for rear lamps, trunk hinges, and sometimes the fuel filler neck. The panel's thickness ranges from 0.7mm to 1.2mm, depending on vehicle class and safety requirements. Advanced models may include reinforcement beams or foam inserts for additional crash protection.

Fitment and Alignment Considerations

Proper quarter panel installation requires precise alignment with the door, trunk, and roof rails. Tolerances are often within 1-2mm to ensure correct panel gaps and prevent wind noise or water leaks. Spot welding, MIG welding, or structural adhesives are used depending on OEM specifications. Failure to align the panel correctly can result in uneven gaps, poor door closure, and compromised crash performance.

Corrosion Protection and Finishing

After installation, quarter panels must be treated with anti-corrosion coatings, seam sealers, and high-quality primers. OEM panels often come e-coated for maximum rust resistance. Paint matching is critical, especially for metallic or pearl finishes. Professional shops use spectrophotometers and blending techniques to ensure a seamless appearance. Proper finishing extends the panel's lifespan and maintains vehicle value.

Engineering Excellence & Technical Specifications

Material Engineering and Strength

Panels are made from high-strength steel (270-590 MPa yield) or aluminum, with e-coating for rust prevention. Reinforcement beams and foam inserts are used in safety-critical areas.

Fitment and Alignment Precision

Panel gaps are maintained within 1-2mm for optimal appearance and aerodynamic performance. Factory weld points and adhesive locations are matched to OEM specifications.

Corrosion Protection and Surface Finish

E-coated panels resist rust for over 500 hours in salt spray tests. Seam sealers and cavity waxes are applied to all joints for long-term durability.

Quality Control and Sourcing

AutoPartEx inspects all panels for correct dimensions, coating integrity, and shipping damage. Detailed fitment data ensures compatibility with related parts like the Air Box/Air Cleaner and AC Compressor.

Quarter Panel Parts & Service Information

Quarter Panel Removal and Installation

Remove trim, lamps, and adjacent panels. Drill out factory spot welds or cut adhesive bonds. Align new panel within 1-2mm of reference points. Weld or bond per OEM specs. Apply seam sealer and corrosion protection before painting.

Difficulty: Expert • Tools: Spot weld cutter, MIG welder, body alignment tools, seam sealer, paint equipment

Quarter Panel Maintenance and Inspection

Inspect for rust, dents, and paint damage annually. Check wheel arches and lower edges for corrosion. Touch up paint chips promptly and apply rust inhibitors as needed.

Difficulty: Moderate • Tools: Inspection light, rust converter, touch-up paint, body filler

Quarter Panel Diagnostics

Check for water leaks, uneven panel gaps, or trunk misalignment. Use measuring tools to verify reference points. Inspect for sensor or antenna integration in modern panels.

Difficulty: Moderate • Tools: Panel gap gauge, water hose, multimeter (for sensors), inspection mirror

Quarter Panel Service and Warranty

Follow OEM repair procedures for welding, bonding, and corrosion protection. Document all work for warranty coverage. Use only approved panels and coatings to maintain structural integrity.

Difficulty: Expert • Tools: OEM service manual, digital camera, warranty documentation