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The WG1674870109 left deflector (H78L) is a genuine SINOTRUK HOWO component designed to optimize airflow around the chassis and cab, reducing drag and protecting critical underbody parts from road debris. As a vital element of the trusted Sinotruk howo parts family, this deflector is precision‑molded from high‑impact ABS plastic with UV stabilizers, ensuring long‑term durability against weathering, stone impacts, and vibration. The WG1674870109 features factory‑matched mounting points and contours, guaranteeing a seamless fit on the left side of Howo heavy‑duty trucks. By guiding air smoothly around the chassis, it improves fuel efficiency and helps keep the engine bay, suspension, and chassis components clean from mud, water, and debris.
Left Deflector H78L
Левый дефлектор H78L
Deflector izquierdo H78L
The WG1674870109 deflector is injection‑molded from high‑grade ABS (Acrylonitrile Butadiene Styrene) compounded with UV inhibitors and impact modifiers. This material choice ensures excellent resistance to cracking from stone impacts, fading from sunlight, and deformation under high temperatures. The deflector’s aerodynamic shape is developed through CFD analysis to reduce turbulence around the chassis, contributing to lower fuel consumption and reduced wind noise. Its smooth surface also prevents dirt and mud accumulation, making it easier to clean during maintenance.
Factory‑precision mounting points on the WG1674870109 align perfectly with the chassis brackets, ensuring a gap‑free fit without the need for drilling or modification. The deflector includes all necessary stainless steel mounting hardware, resistant to corrosion. Its textured black finish matches the original equipment appearance and can be painted if desired. Each deflector is inspected for dimensional accuracy and surface quality, guaranteeing that it meets SINOTRUK HOWO’s strict standards.
The table below provides detailed technical data for the genuine SINOTRUK HOWO WG1674870109 left deflector (H78L). These specifications are essential for verifying compatibility and understanding its physical characteristics.
| Parameter | Specification | Details |
|---|---|---|
| OEM Part Number | WG1674870109 | SINOTRUK HOWO Original Code |
| Product Name | Left Deflector H78L | Chassis aerodynamic deflector |
| Material | High‑impact ABS with UV stabilization | Weather‑resistant, paintable |
| Overall Length | 920 mm | ±3 mm |
| Overall Width (max) | 240 mm | At the widest point |
| Height (profile) | 85 mm | Aerodynamic shape |
| Thickness | 3.5 mm (nominal) | Reinforced ribs at mounting points |
| Mounting Type | Bolt‑on using pre‑drilled holes | Includes stainless steel bolts & washers |
| Color / Finish | Textured black (as original) | Can be painted |
| Weight (approx.) | 1.8 kg | Lightweight, durable |
| Temperature Range | -40°C to +80°C | Suitable for all climates |
| Applicable Models | Howo T7H, A7, and classic Howo‑7 series with H78L cab | Verify chassis code |
| Included Hardware | Mounting bolts, washers, nuts (stainless steel) | Complete set |
The WG1674870109 left deflector is specifically designed for the H78L cab variant used on Howo T7H, A7, and classic Howo‑7 series trucks. It mounts on the left side of the chassis, typically between the front wheel and the cab step, redirecting airflow away from the suspension, fuel tanks, and other underbody components. This reduces the accumulation of road spray, mud, and debris, which can cause corrosion and premature wear. The deflector also improves aerodynamics, contributing to better fuel economy—especially at highway speeds.
In mining, construction, and long‑haul operations, the chassis is exposed to harsh environments. The WG1674870109 acts as a first line of defense, protecting sensitive components like air tanks, wiring harnesses, and brake lines from stone impacts. Its robust ABS construction ensures it can withstand occasional impacts without cracking. By maintaining the original aerodynamic profile, the deflector also helps keep the cab and chassis cleaner, reducing maintenance time and enhancing the truck’s professional appearance.
The WG1674870109 is a left‑side component; the right‑side deflector has a different part number. Always verify the orientation before ordering. For trucks equipped with side skirts or additional aerodynamic packages, this deflector integrates seamlessly with the original mounting points.
Correct installation of the WG1674870109 deflector ensures optimal performance and longevity. Follow these steps:
Clean the mounting area on the chassis frame thoroughly, removing any mud or old adhesive. Inspect the bracket for damage or corrosion. If the original deflector was damaged, ensure the bracket is not bent.
Position the new WG1674870109 deflector against the bracket, aligning the pre‑drilled holes. Insert the stainless steel bolts and hand‑tighten. Ensure the deflector sits flush against the bracket without gaps.
Tighten all bolts to the specified torque (typically 8‑10 Nm). Check that the deflector does not interfere with the wheel, cab steps, or any moving parts. Test by turning the steering to full lock if near the wheel.
Over time, the deflector may suffer from impact damage or UV degradation. Common signs that replacement is needed include:
A damaged deflector not only looks unsightly but can also allow debris to strike vulnerable chassis components. Replacing it promptly with a genuine WG1674870109 restores protection and maintains the truck’s aerodynamic efficiency.
By deflecting road debris and water, the genuine deflector prolongs the life of chassis parts such as air tanks, valves, and wiring, reducing maintenance costs.
The aerodynamic shape reduces drag, contributing to lower fuel consumption—a critical factor for long‑haul operators.
Precise matching of contours and mounting points ensures a seamless appearance, preserving the truck’s resale value and professional image.
To maximize the service life of your WG1674870109 deflector, follow these best practices:
By adhering to these guidelines, you ensure that the WG1674870109 deflector performs optimally throughout its intended service interval.
Aftermarket deflectors are often made from cheaper, non‑UV‑stabilized plastics that become brittle and fade within months. They may have incorrect curvature, leading to poor fit and even vibration damage to the chassis. The genuine WG1674870109 is manufactured to the exact specifications of the original equipment, using high‑grade ABS with UV inhibitors and impact modifiers. It undergoes rigorous testing for material durability and dimensional accuracy, guaranteeing that it will perform as intended for years.
By choosing authentic SINOTRUK HOWO parts, you protect your investment and ensure your truck maintains its aerodynamic performance and professional appearance. The Sinotruk howo parts catalog includes a full range of chassis and cab components engineered for maximum reliability. For fleet managers and owner‑operators who demand the best, the genuine WG1674870109 is the only responsible choice.
The WG1674870109 left deflector is used on Howo trucks with the H78L cab, including T7H, A7, and classic Howo‑7 models produced after 2012. It is specific to the left side; the right‑side counterpart is WG1674870110. Always verify the chassis number and cab type before ordering.
Each WG1674870109 is individually packaged in a protective cardboard box with foam inserts to prevent damage during shipping. The package includes the deflector, a full set of stainless steel mounting bolts, washers, and lock nuts. Installation instructions are printed on the box.
Production of the WG1674870109 takes place in ISO 9001 certified facilities, using precision injection molding with robotic handling to ensure consistent quality. Every batch is tested for impact resistance (Izod), UV weathering (QUV), and dimensional accuracy. Statistical process control guarantees that each deflector meets the strict tolerances required for proper fit on Howo chassis.
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