Key Takeaways

• Best value option: OEM-quality reproduction fenders from brands like TYC and DCP offer near-factory fit at 40–60% below dealership prices.
• Average replacement cost: $150–$400 per fender for parts alone; professional installation adds $300–$700 depending on paint and labor rates in your area.
• Most common failure points: rust at the wheel-well arch, impact damage from road debris, and corroded mounting studs that strip during removal.
• Front vs. rear: Front fenders are more frequently damaged due to their exposure to stone chips and intersection collisions; rear fenders tend to fail from rust penetration rather than impact.
• Purchase tips: Always verify your trim level (DE, ES, or GT) and body style (4-door sedan vs. 5-door hatchback) before ordering — fender geometry differs across variants.

What Is a Fender on a 2003 Mazda Protege?

Understanding the Role of Front and Rear Fenders

The 2003 Mazda Protege features two fender assemblies — one on each side of the vehicle. The front fender (also called a wing panel) mounts between the hood and the front door, covering the upper portion of the front wheel well. The rear fender sits behind the front door and frames the rear wheel opening. Together, these panels protect the engine bay, suspension components, and passenger compartment from road debris, water splash, and minor impact damage.

Front Fender vs. Rear Fender: Key Differences

How to Replace a 2003 Mazda Protege Fender (Step-by-Step)

Tools You'll Need

• Socket set (8 mm, 10 mm, and 12 mm sockets)
• Ratchet extension and universal joint
• Phillips and flat-head screwdrivers
• Trim-panel removal tool (to avoid marking clip housings)
• Penetrating oil (PB Blaster or equivalent) for corroded fasteners
• Drill with metal-cutting bit (for rusted rivets)
• New fender-mounted clips and bolts (always replace hardware)
• Bondo or body filler for minor seam smoothing
• Primer, basecoat, and clearcoat (if unpainted)

Removal Procedure

1. Open the hood and remove the fender-to-cowl cover screws. These are typically Torx or Phillips heads hidden beneath a plastic garnish strip along the cowl panel.
2. Disconnect the turn-signal/parking-light wiring harness. On the 2003 Protege, the front signal bulb integrates into the fender assembly. Press the retaining tab and pull the connector free.
3. Remove the three to four bolts securing the fender to the strut tower. Use a 10 mm socket. Apply penetrating oil if fasteners resist turning.
4. Loosen the door-jamb bolts. Support the fender while removing the forward-most bolt that threads into the A-pillar reinforcement.
5. Release the front-edge clips from the bumper beam. Gently pry upward using a trim tool; do not force, as plastic clips break easily on a 22-year-old panel.
6. Lift the fender away from the vehicle. Guide it clear of the hood latch and headlight bezel.

Installation Procedure

1. Test-fit the new fender before removing the old one entirely. Align all bolt holes and verify clearance against the hood and bumper.
2. Transfer any brackets, liners, or mounting studs from the old panel to the replacement. This includes the side-marker light bracket and bumper-brace spacer.
3. Position the new fender and hand-tighten all bolts. Leave them slightly loose to allow micro-adjustments.
4. Check panel gap uniformity. The gap between the fender and hood should measure approximately 4–5 mm across its entire length. Adjust by shifting the fender laterally.
5. Torque all fasteners to specification: 8–10 Nm for sheet-metal bolts, 12–15 Nm for structural mount points.
6. Reconnect the turn-signal wiring and reinstall the cowl cover.
7. Apply primer and paint if the replacement fender is unpainted. Allow full cure before exposing the panel to moisture.

Where to Buy a 2003 Mazda Protege Fender — And What to Watch For

New vs. Used vs. Remanufactured: Which Is Right for You?

Buyer Checklist: Avoid These Common Mist