The mirror system on the HOWO MAX 4X2 tractor is an essential safety feature, providing the driver with a comprehensive view of the vehicle’s surroundings. This genuine HOWO set includes rearview units, blind spot aids, front lower view components, and all necessary mounting hardware, ensuring optimal visibility and reducing blind spots in critical areas. When you choose authentic Howo Parts, this kit guarantees OE fitment, durability, and reliable performance in all driving conditions. Below are detailed descriptions of every component included with this assembly.
The hexagon bolt with flange is a high-strength fastener used to secure the mirror assemblies to the cab or mirror brackets. Two flange bolts (ZQ1840620F31) and six flange bolts (ZQ1840625F31) are supplied in this kit. These bolts feature an integrated flange that distributes clamping load evenly across the mounting surface, eliminating the need for separate washers. The bolts are made from grade 8.8 steel with a zinc-plated finish, providing excellent corrosion resistance and durability in harsh weather conditions. Proper torque (typically 15-20 Nm) ensures the unit remains firmly attached and vibration-free at highway speeds.
This blind spot mirror assembly (NJ – 20) is a supplementary convex unit that mounts on the driver’s side or passenger’s side to eliminate dangerous blind zones. This component is designed to provide a wide-angle view of areas that are not visible through standard rearview units, such as the side of the vehicle and adjacent lanes. The convex glass has a curvature that expands the field of view by up to 40%, helping the driver detect vehicles in adjacent lanes during lane changes and merging manoeuvres.
The housing is made from impact-resistant ABS plastic with a UV-stabilised coating that prevents fading and cracking under prolonged sun exposure. The assembly includes an adjustable bracket that allows fine-tuning of the viewing angle to suit the driver’s preference and seating position. In the HOWO MAX 4X2, this blind spot unit works in conjunction with the main rearview mirrors to provide a comprehensive 360-degree awareness of the vehicle’s surroundings, significantly enhancing safety during urban driving and tight parking situations.
The front lower view mirror (YG1671770040) is a specialised unit mounted on the front of the cab or on the bonnet, providing a downward view of the area immediately in front of the vehicle. This part is critical for detecting obstacles, pedestrians, or low-lying objects that are not visible through the windscreen or main mirrors. The front lower view mirror is particularly important when manoeuvring in tight spaces, such as loading docks, construction sites,
or crowded urban streets where the driver needs to see the ground directly in front of the truck. The housing is constructed from durable ABS with a weather-resistant seal that prevents moisture ingress. The glass is convex to provide a wide-angle view, and the bracket is adjustable to accommodate different driver heights and cab configurations. This front lower view component is an essential safety feature for the HOWO MAX 4X2, especially when operating in environments with limited visibility or where pedestrians and cyclists may be present near the front of the vehicle.
Two rearview units (YZ167177000002 and YZ167177000001) are supplied as part of the complete vision system for the HOWO MAX 4X2 cab. These are the primary exterior rearward visibility devices, mounted on both the driver and passenger sides of the cab. Each rearview unit consists of a durable plastic housing, a multi-layer laminated glass element with anti-glare properties, and an adjustable arm that allows precise positioning. The arms are engineered from reinforced polymer composites with metallic inserts to dampen vibration and prevent oscillation at highway speeds.
The glass features a hydrophobic coating that repels water and road grime, maintaining clear visibility even during heavy rain. The housing is aerodynamically contoured to reduce wind resistance and noise. The rearview unit provides a standard flat or slightly convex view, giving the driver a clear and accurate perception of following traffic, lane positioning, and reversing conditions. In the HOWO MAX 4X2, these units are designed to withstand the rigours of long-haul trucking, including exposure to extreme temperatures, road salt, and stone chips.
Mirror – genuine HOWO complete vision and safety mirror kit for MAX 4X2
This kit includes rearview units, blind spot aids, front lower view components, and all mounting bolts, providing a comprehensive 360-degree visibility solution for the HOWO MAX 4X2 driver.
All components are made from impact-resistant materials with UV-stabilised coatings, capable of withstanding harsh weather, road debris, and temperature extremes.
Every component and fastener in this kit is manufactured to SINOTRUK’s exact OEM specifications, ensuring perfect alignment with the HOWO MAX 4X2 cab mounting points.
The arms incorporate reinforced polymer composites with metallic inserts to minimise vibration and oscillation, maintaining a clear and stable image at all speeds.
The vision system on the HOWO MAX 4X2 is designed to provide the driver with optimal visibility of the vehicle’s surroundings, including rear, side, and front areas. The primary rearview units mounted on both cab doors provide a standard view of following traffic and lane positions. The blind spot units, mounted below or alongside the main units, offer a convex view that expands the driver’s field of vision to detect vehicles in adjacent lanes that may not be visible through the primary ones.
The front lower view unit, mounted on the front of the cab, provides a downward view of the area immediately in front of the vehicle, helping the driver detect obstacles, pedestrians, or low objects near the front bumper. The system is designed to work together to eliminate dangerous blind spots, particularly around the front wheels and sides of the vehicle, which are critical areas when manoeuvring in tight urban environments or construction sites. The arms are engineered to dampen vibration, maintaining a stable and clear image even when driving on rough roads at highway speeds.
Before installing, ensure the vehicle is on level ground and the cab is in a normal driving position. Start by positioning the rearview unit bracket onto the designated mounting points on the cab door, using the supplied ZQ1840625F31 flange bolts and washers. Hand-tighten all bolts initially, then torque them to 15-20 Nm using a calibrated torque wrench. Install the blind spot assembly (NJ – 20) onto its bracket, adjusting the viewing angle to suit the driver’s preferred line of sight.
Secure it using the ZQ1840620F31 flange bolts. Install the front lower view unit (YG1671770040) onto the front cab or bonnet mounting bracket, adjusting the angle to provide a clear view of the ground immediately in front of the vehicle. Secure all fasteners to the specified torque. After installation, test the adjustments by having the driver sit in the normal driving position and verify that the field of view from each unit covers the intended areas. Make final adjustments as needed. The installation is now complete.
If a unit vibrates excessively at highway speeds, check that all mounting bolts are tightened to the correct torque and that the arm is not damaged or loose. A loose unit can also cause vibration; retighten the mounting bolts. If the glass is fogged or has water ingress, the housing seal may be damaged – replace the entire unit. If a unit does not hold its adjustment position,
the tension mechanism in the arm may be worn; tighten the adjustment joint or replace the arm assembly. If the front lower view unit is obstructed by dirt or moisture, clean the surface with a soft cloth and mild glass cleaner. Inspect the brackets for cracks or fatigue; replace any damaged components. Always use genuine HOWO parts to ensure correct fitment and performance.
Inspect the entire vision system at every scheduled service (every 20,000 km). Check the glass for cracks, chips, or delamination. Ensure all mounting bolts are tight and that the arms are not corroded or damaged. Clean the surfaces with a soft cloth and mild glass cleaner to maintain visibility. Lubricate the adjustment joints with a light silicone spray if they become stiff.
Check the blind spot unit for proper alignment and adjust as necessary. If a housing shows signs of cracking or sun damage, replace the assembly to prevent failure. Keep the mounting areas clean and free from debris to ensure proper fitment. A well-maintained system ensures the driver has optimal visibility, contributing to safer driving and reducing the risk of accidents.
This kit is specifically designed for the HOWO MAX 4X2 tractor cab and is compatible with all production years from 2018 onward. The rearview units (YZ167177000002 and YZ167177000001) are pre-formed to match the exact contour of the cab doors. The blind spot unit (YG1671770050) and front lower view unit (YG1671770040) are designed to mount onto the factory brackets.
The flange bolts (ZQ1840620F31 and ZQ1840625F31) are standard M8 fasteners with the correct thread pitch and length for the OEM mounting points. This kit is also compatible with SITRAK C7H and HOWO T7H models that share the same cab architecture. It is not compatible with older A7 or WD615 models, which use different mounting designs and bolt lengths. Always verify your vehicle’s cab configuration before ordering.
Aftermarket units may use inferior glass that distorts the view or plastic housings that degrade quickly under UV exposure. Generic blind spot units may not provide the correct field of view, leaving dangerous blind zones. Non-genuine mounting bolts may have the wrong thread pitch or length, leading to loose units that vibrate or fall off during operation.
Genuine HOWO components are manufactured to SINOTRUK’s exacting standards, using high-quality glass, UV-stabilised materials, and precision-made fasteners. The small additional cost of a genuine kit is negligible compared to the safety risk of driving with compromised visibility.
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