The Shacman High/Low Beam and Parking Light Assembly, identified by the precise OEM part number DZ93189723021 for the right side, is a comprehensive, factory-engineered lighting unit that integrates multiple critical front illumination functions into a single, durable housing. This assembly is a fundamental safety and operational component for Shacman heavy-duty trucks, providing the primary forward lighting for nighttime driving, adverse weather conditions, and vehicle visibility. The part number DZ93189723021 specifies the complete right-side unit, which includes the sealed beam or halogen/HID reflector for main headlight functions (high and low beam) alongside the integrated parking/side marker light. Engineered to meet stringent international lighting standards, this assembly ensures optimal light pattern, intensity, and durability for commercial vehicle operations.
As a genuine Shacman component, the DZ93189723021 guarantees perfect fitment, beam alignment, and electrical compatibility with the truck’s wiring harness and lighting control system. Its robust construction is designed to withstand vibration, stone impacts, moisture ingress, and temperature extremes common in long-haul and vocational trucking. A clear, undamaged lens and a properly functioning reflector are essential for regulatory compliance and safe operation. Replacing a damaged or degraded unit with this genuine assembly restores factory lighting performance, enhancing driver visibility, on-road safety, and the professional appearance of the vehicle. For fleet managers, this part is a key inventory item for maintaining roadworthiness and safety standards across their Shacman truck fleet.
| Parameter | Specification |
|---|---|
| OEM Part Number | DZ93189723021 |
| Component Name | High/Low Beam & Parking Light Assembly (Right) |
| Brand | Shacman |
| Light Functions | High Beam, Low Beam, Parking/Side Marker Light |
| Lamp Type (Main) | Halogen H4 / H7 (or as per Model Specification) |
| Lamp Type (Parking) | W5W (T10) Bulb or LED (Model Dependent) |
| Voltage | 12V or 24V (Vehicle System Specific) |
| Housing Material | Heat-Resistant Thermoplastic or Die-Cast Metal |
| Lens Material | Polycarbonate (PC) – Clear or Patterned |
| Compatibility | Shacman X3000, F3000 Series (Right Side Specific) |
The DZ93189723021 assembly consolidates three legally mandated lighting functions. The low beam provides dipped illumination for normal night driving, casting a forward and downward pattern to avoid dazzling oncoming traffic while lighting the road ahead.
The high beam offers full, long-range illumination for use on unlit roads when no other vehicles are present. The integrated parking light (also called a sidelight or position light) makes the truck’s outline visible when parked or used in conjunction with low beams.
This integration ensures all critical front-facing lights are perfectly aligned within a single housing. This maintains consistent optical geometry, which is crucial for achieving the correct beam pattern as certified by the vehicle manufacturer.
The reflector and lens are meticulously designed to project light in a specific, regulated pattern. A proper low beam has a sharp “cut-off” line to prevent glare. The high beam reflector focuses light for maximum distance.
Using the genuine DZ93189723021 assembly guarantees this optical performance. Aftermarket units may have poor reflector finishes or lens patterns, resulting in scattered light, dark spots, or illegal glare that fails inspection and compromises safety.
The housing is constructed from materials that can endure engine bay temperatures, constant vibration from rough roads, and exposure to chemicals like road salt and cleaning agents. Metal housings offer superior heat dissipation.
A critical feature is the sealing between the lens and the housing. This seal prevents condensation and water ingress, which can corrode contacts, cause bulb failure, and scatter light. The genuine assembly maintains this seal integrity.
The polycarbonate lens is highly impact-resistant to withstand flying debris. It is also treated with a UV-resistant coating to prevent yellowing and hazing over time, which would severely reduce light output.
The assembly features OEM-specific electrical connectors (typically a 3-pin for H4 type). These connectors are keyed to prevent incorrect installation and ensure a secure, waterproof connection to the truck’s wiring loom.
Using the correct assembly ensures plug-and-play compatibility. Modifying wiring for a non-standard unit can introduce resistance, voltage drop, and potential fire hazards, especially with high-wattage headlight bulbs.
The DZ93189723021 is specifically for the right side (passenger’s side in left-hand drive markets). While similar, left and right assemblies are often mirror images due to slight differences in mounting points and beam pattern adjustment screws.
Installation involves aligning the unit in the front fascia or grille opening, securing it with several bolts or clips, and connecting the electrical plug. Proper mounting ensures the housing is stable and resistant to vibration.
After installation, critical beam alignment must be performed using an optical aimer. This adjusts the vertical and horizontal aim of the low beam to meet legal requirements and ensure safe illumination without blinding other drivers.
Common issues include cracked or yellowed lenses, internal condensation, burnt or corroded reflector coatings, and broken mounting tabs. A damaged housing can also allow water to enter and cause electrical shorts.
Even with new bulbs, a degraded assembly will produce poor light output. It is more cost-effective to replace the entire unit with DZ93189723021 than to attempt repairing individual internal components which are often not serviceable.
Front lighting is regulated worldwide. The DZ93189723021 is designed to meet ECE (Economic Commission for Europe) or other regional standards, including photometric values (light intensity and pattern) and durability specifications.
Using non-compliant lighting can lead to vehicle inspection failure, fines, and invalidated insurance in the event of an accident where poor lighting was a contributing factor. Genuine parts guarantee compliance.
Good lighting is a proactive safety measure. It allows the driver to see obstacles earlier and be seen by other road users from a greater distance, effectively reducing reaction times and preventing collisions.
This assembly is tested for performance in rain, fog, dust, and extreme temperatures. The beam pattern is designed to minimize back-scatter in fog and heavy rain, providing the best possible visibility in adverse conditions.
For trucks operating in remote areas or long-distance routes, reliable lighting is non-negotiable. A failure can leave a driver stranded in darkness, creating a dangerous situation. The robustness of the genuine part mitigates this risk.
Consistent light output also reduces eye strain for the driver during night shifts, contributing to better alertness and reduced fatigue, which are critical factors for long-haul safety.
Beyond function, the headlight assembly significantly affects the truck’s front appearance. A clear, matching set of lights presents a well-maintained, professional image for fleets and owner-operators, impacting brand perception.
Replacing a single damaged unit with the genuine DZ93189723021 ensures it matches the color, clarity, and light tone of the existing left-side assembly, maintaining a symmetrical and OEM look.
While the assembly itself is durable, bulbs are wear items. The design typically allows for bulb replacement from the rear of the housing without removing the entire unit, simplifying maintenance.
Always use bulbs of the correct type and wattage as specified. Over-wattage bulbs can generate excess heat, damaging the reflector and lens seals, and potentially overloading the wiring circuit.
Regularly clean the lens with a soft cloth and approved plastic cleaner. Avoid abrasive materials that can scratch the surface. Inspect for stone chips and cracks during routine vehicle checks.
Each DZ93189723021 assembly undergoes quality checks for optical clarity, reflector integrity, electrical function, and sealing. Sample units are subjected to environmental tests including thermal shock, vibration, and water spray.
Photometric testing in a dark room ensures the beam pattern meets the exact cutoff and intensity zones required by regulation. This rigorous process guarantees that every unit performs as intended in real-world conditions.
Shacman’s commitment to quality ensures this component delivers reliable service throughout its lifespan, matching the durability expected from all genuine Shacman truck parts.
Choosing the genuine DZ93189723021 ensures perfect fit, guaranteed performance, and regulatory compliance. It is engineered as a system with your Shacman truck’s electrical supply and front-end design.
Aftermarket assemblies often compromise on materials, optical precision, and sealing. They may fit poorly, leak, provide inadequate lighting, or fail prematurely, leading to higher costs and safety risks over time.
Investing in the genuine part protects your safety, your vehicle’s compliance, and its resale value. It is the only way to ensure your truck’s lighting system performs exactly as designed by Shacman engineers.
The Shacman High/Low Beam and Parking Light Assembly, OEM number DZ93189723021, is a vital, integrated lighting component that ensures safety, compliance, and reliability for the right front of your truck. Its precision optics, robust construction, and perfect fit are essential for optimal nighttime visibility and vehicle operation.
When replacing a damaged or aged unit, selecting this genuine assembly is a direct investment in driving safety and operational professionalism. It restores factory lighting performance, ensuring you can see and be seen in all conditions.
For exact model verification, to ensure correct side selection, or to procure this critical lighting component, please use the contact options provided. Illuminate your path with confidence using genuine Shacman quality.
