FAW Lower Right Deflector 5704220-B90/I for truck protection

Protect your truck’s critical undercarriage components with the genuine FAW Lower Right Deflector, OEM part number 5704220-B90/I. This essential aerodynamic panel is mounted on the passenger side beneath the cab, designed to shield the chassis, fuel lines, and other vital parts from road debris, water, and corrosive salts. As a key element in a complete set of durable Faw truck parts, the 5704220-B90/I plays a dual role in vehicle protection and efficiency.

Its robust construction deflects stones and mud kicked up by the tires, preventing costly damage and corrosion. Simultaneously, it streamlines airflow under the vehicle, contributing to reduced aerodynamic drag and improved fuel economy. Replacing a damaged or missing 5704220-B90/I unit is crucial for maintaining the truck’s operational integrity, safety, and long-term value, ensuring a direct fit and optimal performance for the right side of your FAW vehicle.

Core Protective Function of 5704220-B90/I

The primary mission of the Lower Right Deflector 5704220-B90/I is to serve as a physical barrier. Positioned strategically on the passenger side, it intercepts a constant barrage of hazards from the road. These include gravel, rocks, road salt, slush, and mud propelled by the front tires.

Without this shield, these elements would directly strike and damage components such as the fuel system, brake lines, electrical wiring, and the chassis itself. The 5704220-B90/I effectively absorbs and redirects impacts, significantly extending the service life of these expensive and safety-critical parts.

Aerodynamic Efficiency and Spray Mitigation

Beyond impact protection, the 5704220-B90/I is an aerodynamic aid. Its contoured design helps manage the turbulent airflow that occurs beneath the truck’s cab and chassis at highway speeds. By smoothing this airflow, it reduces drag, which can lead to marginal but valuable gains in fuel efficiency over long distances.

Furthermore, the deflector acts as a sophisticated splash guard. It controls and reduces the volume of water spray thrown up from wet roads, keeping the undercarriage cleaner and minimizing the amount of corrosive road salt and grime that adheres to metal components, thereby slowing the onset of rust.

Technical Specifications: Lower Right Deflector 5704220-B90/I

Durable Construction for Harsh Environments

Engineered for resilience, the 5704220-B90/I is typically manufactured from high-grade, UV-stabilized plastics like polyethylene or advanced composites. These materials are selected for their exceptional toughness, flexibility, and resistance to chemicals, moisture, and extreme temperature fluctuations.

The deflector’s structure often incorporates reinforced ribs and thicker sections at stress points, such as around mounting holes, to prevent cracking from vibrations and impacts. This robust build ensures the 5704220-B90/I can withstand the punishing environment beneath a heavy-duty truck for years.

Installation Process and Fitment Precision

Installing the 5704220-B90/I requires access to the truck’s underside. The vehicle should be safely lifted and supported. The old deflector is removed by unbolting it from its mounting brackets on the cab floor and chassis frame. The area should be cleaned of debris.

The new genuine 5704220-B90/I deflector is then offered up, aligning all bolt holes precisely. Using the correct fasteners and following the specified torque sequence is vital to ensure a secure, flush fit that won’t rattle or come loose, guaranteeing optimal performance and protection.

Identifying Damage: When to Replace 5704220-B90/I

Several signs indicate the need for a replacement. Large cracks, especially those radiating from mounting points, compromise structural integrity. Severe warping or deformation from heat or impact changes the aerodynamic and protective function.

Missing sections, broken mounting tabs, or a deflector that is loosely hanging or dragging pose immediate safety risks. Advanced UV degradation, making the plastic brittle and chalky, also signals that the 5704220-B90/I has reached the end of its service life.

Right-Side Specific Design and Model Fit

The 5704220-B90/I is specifically contoured for the RIGHT lower side of the cab. It is a mirror image of the left-side deflector and is designed to accommodate the unique layout of components on the passenger side, such as the exhaust path or specific fuel tank shapes.

Using the correct side-specific part is non-negotiable for proper fit and function. Furthermore, this deflector is engineered for specific FAW truck models, ensuring perfect alignment with factory mounting holes and correct clearance from all adjacent parts.

Aerodynamic Contribution to Operating Costs

While individual aerodynamic components like the 5704220-B90/I provide a small benefit, their effect is cumulative. Combined with other deflectors and fairings, they significantly reduce the truck’s overall drag coefficient. This directly lowers the engine load required to maintain cruising speed.

For fleet managers, this translates into tangible fuel savings across an entire operation. Maintaining all aerodynamic components, including the often-overlooked lower deflectors, is a proven strategy for improving a truck’s total cost of ownership.

Routine Maintenance and Care Instructions

Inspect the 5704220-B90/I deflector during regular service intervals. Check for any new cracks or damage after driving on rough roads. Ensure all mounting bolts are tight, as the high-vibration environment can loosen them over time.

When washing the truck, clean the deflector’s surface and the area behind it to remove mud and salt buildup. Avoid using high-pressure washers directly on the edges or mounting points to prevent forcing water into crevices.

The Importance of Genuine FAW Part 5704220-B90/I

Opting for the genuine 5704220-B90/I guarantees that you receive a part manufactured to FAW’s original specifications for material quality, dimensional accuracy, and performance. It will fit perfectly without modification, saving valuable installation time and eliminating guesswork.

Non-genuine alternatives may compromise on material thickness, UV resistance, or structural design. These compromises can lead to premature failure, poor aerodynamics, and inadequate protection, ultimately costing more in repairs and downtime.

Safety, Roadworthiness, and Environmental Compliance

A properly installed and intact 5704220-B90/I deflector contributes to road safety. It prevents debris from being thrown into the path of other vehicles and helps contain spray in wet conditions, improving visibility for all drivers. It also secures loose parts that could detach.

In many regions, spray suppression devices are mandated for commercial vehicles. Maintaining your lower deflectors ensures compliance with these regulations, avoiding potential fines and ensuring your truck passes periodic roadworthiness inspections without issue.

Integration with a Complete Aerodynamic System

The Lower Right Deflector 5704220-B90/I is not a standalone part; it is a component of an integrated aerodynamic package. It works in concert with the left-side deflector, front air dam, roof fairing, and side skirts to manage airflow around the entire vehicle.

For maximum efficiency, all these components should be present and in good repair. If one deflector is damaged, it can disrupt the intended airflow, reducing the effectiveness of the entire system. A holistic approach to aerodynamic maintenance is recommended.

Cost-Benefit Analysis and Preventative Value

The modest investment in a new 5704220-B90/I deflector pales in comparison to the costs associated with the damage it prevents. Repairing a damaged fuel tank, replacing corroded brake lines, or fixing wiring harness issues involves significant parts, labor, and downtime expenses.

Viewing this component as a preventative maintenance item is key. Replacing it proactively safeguards much more valuable assets on the truck, ensuring operational continuity, safety, and protecting your financial investment in the vehicle.

Conclusion: A Vital Investment in Truck Longevity

The FAW Lower Right Deflector, part number 5704220-B90/I, is an indispensable component for any serious truck operator. It delivers essential protection against physical damage and corrosion while contributing to improved aerodynamic performance and fuel economy.

Its durable, weather-resistant construction is built to last in the toughest conditions. Choosing the genuine OEM part ensures a perfect fit and reliable performance. Regular inspection and timely replacement of the 5704220-B90/I are hallmarks of responsible and cost-effective fleet or vehicle management.

By maintaining this critical piece of underbody armor, you are actively protecting your truck’s vital systems, enhancing its safety profile, and investing in its long-term reliability and value. Ensure your FAW truck is fully equipped to face the challenges of the road.