Product Introduction

• Structure: The control unit is housed in a robust, dust- and moisture-sealed ABS plastic enclosure with integrated mounting brackets. It includes a high-density circuit board with microprocessors and memory, and a multi-pin connector for vehicle wiring integration. The remote keys feature a durable plastic casing with buttons for locking, unlocking, and panic functions, paired with encrypted transponders.

• Performance: The module provides stable, low-power operation, with built-in protection against voltage spikes and short circuits. The encrypted remote keys use rolling-code technology to prevent signal cloning, ensuring high anti-theft security. The entire system is calibrated to withstand the vibration and temperature extremes of heavy-duty truck environments.

Core Function

1. Central Locking Control: Manages the locking and unlocking of all cab doors via both the remote key and door-mounted switches, and includes a speed-sensitive auto-lock function.

2. Power Window Regulation: Controls the operation of all power windows, including one-touch up/down for the driver’s window and anti-pinch safety protection.

3. Mirror System Management: Regulates mirror adjustment and heating functions to maintain visibility in cold or wet conditions.

Left Side Door Control Unit + Remote Key 712W28230-0014 Sinotruk Sitrak — Factory Direct Supply

When it comes to keeping your Sinotruk Sitrak fleet running smoothly, every component matters — especially the ones that control daily access and security. The Left Side Door Control Unit + Remote Key 712W28230-0014 is the nerve center of your driver-side door electronics, managing everything from central locking to window operations and remote keyless entry. Sourced directly from our factory and built to OEM standards, this unit delivers seamless performance that procurement managers can count on for cost-efficiency, fast turnaround, and zero downtime.

At Mettlead, we specialize in genuine-quality replacement parts for SINOTRUK, SITRAK, HOWO, SHACMAN, and other leading Chinese commercial vehicle brands. Whether you are restocking a workshop inventory or fulfilling a fleet maintenance contract, this door control unit ships fast and arrives ready to install.

Key Features and Benefits of the 712W28230-0014 Door Control Unit

Understanding what this part does — and why it matters — helps you make a confident purchasing decision. Here is what sets the Left Side Door Control Unit + Remote Key 712W28230-0014 Sinotruk Sitrak apart:

• Integrated Remote Key Functionality: The bundled remote key pairs directly with the control unit, ensuring reliable keyless entry without additional programming tools.
• OEM-Grade Circuit Design: Internal PCB layout matches Sinotruk factory specifications, providing stable signal output for central locking, power windows, and mirror adjustment.
• Durable Housing Construction: Engineered to withstand cabin vibrations, temperature fluctuations, and humidity — common stressors in heavy-duty truck environments.
• Plug-and-Play Installation: The connector harness aligns perfectly with original Sitrak wiring, so technicians can swap the unit without splicing or adapter cables.
• Enhanced Vehicle Security: Built-in anti-interference encoding prevents unauthorized signal cloning, keeping your fleet assets protected.
• Cost-Effective Replacement: Factory-direct pricing from Mettlead removes middleman markups, giving procurement teams more budget flexibility across large orders.

In short, this door control unit is not just a spare part — it is a reliability upgrade that reduces service callbacks and keeps drivers satisfied on every route.

Technical Specifications — 712W28230-0014

Accurate specifications matter when you are cross-referencing part numbers or verifying fitment for a purchase order. Below is a detailed breakdown of the Left Side Door Control Unit + Remote Key 712W28230-0014 Sinotruk Sitrak:

Application Scenarios — Which Vehicles Fit?

The 712W28230-0014 Left Side Door Control Unit is purpose-built for the Sinotruk Sitrak platform. However, its application spans several specific model configurations commonly seen in international logistics, construction, and long-haul operations:

• Sitrak C7H Series: Long-haul tractor units widely deployed across Africa, Southeast Asia, and Central Asia for intercity freight.
• Sitrak C5H Series: Medium-to-heavy-duty trucks used in regional distribution and construction material transport.
• Sitrak G7 Series: Next-generation cab platform trucks, increasingly adopted by fleet operators upgrading from older HOWO models.

If your fleet includes any Sitrak cab model manufactured from 2016 onwards with the standard 24V electrical architecture, this control unit is a direct fit. For operators managing mixed fleets that also include HOWO or SHACMAN vehicles, Mettlead supplies the full range of door electronics across all platforms — browse our complete Truck Cab Parts category to find matching components.

OEM / ODM Capability and Custom Packaging

Mettlead understands that distributors and aftermarket brands have unique requirements. That is why we offer flexible manufacturing and branding solutions tailored to your business model:

• White-Label Packaging: Receive the 712W28230-0014 door control unit in neutral packaging, ready for your own brand labels — ideal for aftermarket resellers building a regional parts brand.
• Custom Packaging Design: We produce branded boxes, instruction inserts, and barcode labels according to your artwork and specifications.
• Strict Quality Control: Each unit undergoes functional testing, voltage stress testing, and signal verification before leaving our facility. Defective rates remain consistently below 0.3%.
• Bulk Order Flexibility: Whether you need 50 units for a single fleet contract or 5,000 for warehouse stock, our production capacity adapts to your timeline.

Need a customized solution? Contact our sales team to discuss your white-label or OEM requirements with zero obligation.

Customer Case Study — Fleet Overhaul in East Africa

Earlier this year, a logistics procurement manager in Kenya reached out to Mettlead with an urgent problem. His company operated 120 Sinotruk Sitrak C7H tractors on the Mombasa–Nairobi corridor, and approximately 35 trucks were experiencing intermittent central locking failures and unresponsive remote keys — all traced back to degraded door control units.

After verifying the OEM part number, he ordered 40 units of the Left Side Door Control Unit + Remote Key 712W28230-0014 Sinotruk Sitrak from Mettlead. Here is what happened next:

1. Quote Turnaround: Our team responded with pricing and lead time within 4 hours of the initial inquiry.
2. Production and QC: All 40 units passed functional testing and shipped within 7 working days.
3. Installation Results: Field technicians confirmed plug-and-play compatibility — average installation time was under 25 minutes per truck with no wiring modifications.
4. Outcome: Zero repeat failures reported across the entire batch over the following 6 months. The client subsequently placed a follow-up order for power window motors and cabin wiring harnesses.

This case demonstrates exactly what Mettlead delivers: the right part, at the right price, on time — with quality that lasts. Explore our full Sitrak Heavy-Duty Parts catalog to see what else we stock for your fleet.

Frequently Asked Questions (FAQ)

1. Does the remote key come pre-paired with the 712W28230-0014 door control unit?

Yes, the remote key included in this package is factory-paired to the control unit. Once you install the unit into your Sitrak truck, the remote key will function immediately — no additional programming equipment is required.

2. Can this left side door control unit work on a right-hand-drive Sitrak model?

This unit is specifically designed for the left side (driver-side door on left-hand-drive vehicles). If your Sitrak is right-hand-drive, this part fits the passenger-side door. Always confirm your cabin configuration before ordering.

3. What symptoms indicate that the 712W28230-0014 control unit needs replacement?

Common failure signs include: central locking that activates intermittently or not at all, power windows stopping mid-travel, remote key losing range drastically, or the door panel switch cluster becoming unresponsive. If cleaning the connectors does not resolve these issues, the control unit itself is likely faulty.

4. Is the remote key frequency compatible with all regions?

The included remote key operates at 433 MHz, which is approved for automotive use in most markets including Europe, Africa, the Middle East, and Asia-Pacific. However, regulations can vary — verify local RF compliance if you distribute in a restricted-frequency region.

5. How does Mettlead ensure the quality of this door control unit matches the original?

Every Left Side Door Control Unit 712W28230-0014 undergoes a multi-point inspection: PCB solder joint verification, 24V load testing across all output channels, remote signal range testing at 30 meters, and thermal cycling between -20°C and +70°C. These steps ensure each unit performs identically to the factory-installed original.

6. Can I order a replacement remote key separately if the key is lost later?

Replacement remote keys are available as standalone items. However, pairing a new key to an existing control unit may require a diagnostic tool. We recommend ordering the complete unit-and-key set (712W28230-0014) to avoid compatibility issues.

Ready to Secure Your Supply? Get a Quote Now

Procurement decisions move fast — and so do we. If the Left Side Door Control Unit + Remote Key 712W28230-0014 Sinotruk Sitrak is on your sourcing list, Mettlead is ready to provide competitive pricing, fast lead times, and reliable logistics to your door.

Here is how to move forward:

1. Request a Quote: Contact us here with your required quantity, destination country, and preferred shipping method.
2. Receive Your Offer: Our team typically responds within 4–8 business hours with unit pricing, bulk discounts, and estimated delivery dates.
3. Confirm and Ship: Once payment is confirmed through our secure channels, your order enters production queue and ships on schedule.

For a complete overview of all available Sinotruk Sitrak components — from engine parts to cabin electronics — visit our Sinotruk Sitrak Truck Parts Full Category Guide. We stock thousands of part numbers so you can consolidate your sourcing with one trusted supplier.

Mettlead — Your Factory-Direct Partner for Chinese Truck Parts Worldwide.