Product Introduction

• • Structure: A heavy-duty, one-piece molded plastic assembly with a reinforced ribbed design for impact resistance. It features precision-engineered mounting holes and integrated brackets for secure attachment to the chassis and fender.

  • Performance: Effectively blocks mud, stones, and road debris from entering the wheel well and damaging the chassis, brake lines, and wiring. The durable plastic construction resists corrosion and impact, ensuring long service life in harsh conditions.

  • Design: Directly interchangeable with original equipment mudguards, engineered to match the truck’s chassis and fender mounting points for a seamless, factory-like fit.

Core Function

1. Debris Protection: Shields the inner wheel well, chassis components, and wiring from mud, stones, and corrosive road salts, extending their service life.

2. Aerodynamic Enhancement: The streamlined design helps direct airflow, reducing turbulence and drag around the wheel area.

3. Durability: The robust plastic construction withstands impact from road debris and resists UV damage, ensuring reliable performance over time.

Upper Left Inner Mudguard Assembly 8403319C6100 Dongfeng — OEM-Grade Protection for Heavy-Duty Fleets

Road debris never takes a day off, and neither should your truck’s first line of defense. The Upper Left Inner Mudguard Assembly 8403319C6100 stands guard inside the wheel arch of your Dongfeng heavy-duty truck, deflecting stones, mud, salt spray, and water away from critical chassis components. Engineered to exact OEM dimensional tolerances, this mudguard assembly drops into place without modification — keeping your fleet rolling and your maintenance costs predictable.

Key Features and Benefits

Precision OEM Fitment

Every contour of this Upper Left Inner Mudguard Assembly 8403319C6100 Dongfeng mirrors the original factory specification. Mounting holes, curvature, and edge profiles align perfectly with existing brackets, eliminating the need for drilling, trimming, or improvised adapters. Your technicians save labor hours; your trucks get back on the road faster.

Robust Material Construction

Manufactured from high-density, impact-resistant engineered polymer (or stamped steel, depending on OE specification), the assembly resists cracking under sub-zero temperatures and maintains structural integrity even after repeated stone impacts at highway speeds. UV-stabilized surfaces resist fading and brittleness over extended service life.

Corrosion and Splash Protection

Positioned directly behind the front-left wheel, this inner mudguard channels water and slurry away from wiring harnesses, brake lines, and suspension joints. By controlling splash trajectory, it extends the service intervals of adjacent components and reduces the risk of electrical faults caused by moisture ingress.

Cost-Effective Fleet Maintenance

Factory-direct pricing from METTLEAD Truck Parts means you pay significantly less per unit without sacrificing the quality your fleet demands. Bulk procurement programs further reduce per-piece cost for large-scale replacement campaigns.

Technical Specifications

Application Scenarios — Where This Mudguard Assembly Performs

The Upper Left Inner Mudguard Assembly 8403319C6100 Dongfeng is engineered for the following heavy-duty platforms:

• Dongfeng Tianlong (KL Series) — Long-haul tractor units operating on highways and intercity corridors
• Dongfeng Tianjin (KR Series) — Medium-to-heavy distribution trucks handling regional logistics
• Dongfeng KX Series — Premium heavy-haul tractors working in mining access roads and construction site logistics
• Dongfeng Commercial Dump Trucks — Off-road and construction-site vehicles exposed to extreme debris environments

Whether your fleet navigates dusty quarry tracks in Southeast Asia, monsoon-soaked highways in West Africa, or salted winter roads in Central Asia, this mudguard assembly absorbs punishment so your chassis stays clean and functional.

OEM/ODM Capability

White-Label and Custom Packaging

METTLEAD Truck Parts supports distributors and fleet operators who need branded packaging or private-label solutions. We print your logo, part numbers, and barcodes directly onto packaging — making your inventory management seamless and your brand presence consistent across every warehouse shelf.

Strict Quality Control

Every Upper Left Inner Mudguard Assembly 8403319C6100 passes through a multi-stage inspection process:

1. Raw Material Verification — Incoming material certificates checked against OEM material specs
2. Dimensional Inspection — CMM (Coordinate Measuring Machine) sampling ensures mounting-hole accuracy within ±0.3 mm
3. Surface and Structural Check — Visual and impact testing confirms no micro-cracks, warping, or coating defects
4. Packaging Audit — Final verification before dispatch to prevent transit damage

Scalable Supply

As a factory-direct supplier covering Dongfeng, SINOTRUK, SHACMAN, FAW, FOTON, WEICHAI, and more, METTLEAD maintains deep inventory buffers on high-demand SKUs. This means your 8403319C6100 mudguard assembly ships within days, not weeks.

Customer Case Study

Fleet Operator in East Africa Cuts Downtime by 40%

A logistics company operating 120 Dongfeng Tianlong tractors across Kenya and Tanzania struggled with accelerated corrosion on chassis wiring and premature brake-line degradation. Root cause analysis traced the damage to failed aftermarket inner mudguards that cracked within three months of installation.

After switching to the Upper Left Inner Mudguard Assembly 8403319C6100 Dongfeng sourced through METTLEAD Truck Parts, the fleet recorded:

• Zero mudguard replacements over a 12-month evaluation period
• 40% reduction in unscheduled wheel-arch maintenance events
• Significant savings on wiring harness and brake-line replacements previously caused by uncontrolled water and debris ingress

The procurement manager noted: “The fit was identical to the original Dongfeng part. We installed 240 pieces across the fleet — left and right — and haven’t looked back. The pricing from METTLEAD made it viable to replace every unit proactively rather than waiting for failures.”

Frequently Asked Questions

Is the 8403319C6100 Upper Left Inner Mudguard Assembly an exact OEM replacement?

Yes. This assembly is manufactured to match the original Dongfeng factory dimensions, mounting points, and material specification. It installs without any modification to the truck’s existing bracket structure.

What material is the Upper Left Inner Mudguard Assembly 8403319C6100 made from?

Depending on the specific Dongfeng model year and cab variant, the mudguard is produced in either high-density polypropylene (PP) with UV stabilizers or stamped steel with anti-corrosion coating. Both variants meet OEM durability benchmarks.

Can this mudguard assembly withstand extreme temperatures?

Absolutely. The polymer variant remains flexible and impact-resistant from –40°C to +80°C. The steel variant is zinc-coated or e-coated to prevent rust in humid tropical and salt-spray environments alike.

How does this inner mudguard protect other components?

By forming a sealed barrier inside the wheel arch, the 8403319C6100 assembly prevents stones, mud, and water from impacting brake lines, ABS sensors, wiring looms, and suspension bushings — all of which degrade rapidly when exposed to uncontrolled debris.

Do you offer the corresponding right-side inner mudguard?

Yes. METTLEAD Truck Parts stocks the full range of Dongfeng inner and outer mudguard assemblies, including the right-side counterpart. Contact us with your VIN or model details for exact cross-referencing.

What is the minimum order quantity for bulk procurement?

MOQ is flexible and depends on whether you require standard packaging or custom white-label branding. Small orders for urgent repairs and large container-quantity orders are both welcome.

Ready to Secure Your Supply of Upper Left Inner Mudguard Assembly 8403319C6100 Dongfeng?

Your fleet deserves parts that perform as reliably as the original — without the premium price tag. METTLEAD Truck Parts delivers genuine-quality Dongfeng components direct from China’s manufacturing base, backed by strict inspection protocols and responsive logistics.

Take the next step:

• Request a competitive quotation with volume pricing
• Confirm fitment for your specific Dongfeng model and year
• Ask about white-label packaging for your distribution network
• Arrange a factory visit to inspect our quality control processes firsthand

Contact METTLEAD Truck Parts now
— our team typically responds within 12 hours with pricing, lead times, and shipping options tailored to your region.