Product Introduction

This auto-brake switch 812W25503-6076 is a precision-engineered OEM brake control switch for heavy duty trucks, designed to manage automatic braking functions in commercial vehicle systems. It features a robust black plastic housing, a compact rocker-style actuator, and a sealed internal mechanism, built to deliver reliable, responsive control in heavy-load operations.

Performance

• Responsive Control: This heavy duty auto-brake switchprovides quick, reliable actuation, enabling seamless management of automatic braking functions as a high performance brake control switch.

• Durable Construction: The impact-resistant plastic housing and sealed internal components resist vibration, temperature fluctuations, and road debris, extending service life in harsh undercarriage environments.

• Sealed Design: The fully sealed mechanism prevents moisture and dust ingress, ensuring consistent performance and making it a reliable replacement auto-brake switch.

• Wide Compatibility: Designed to fit most heavy-duty truck brake systems, it is ideal as an auto-brake switch for commercial vehicles.

Core Function

1. Controls automatic braking functions, enabling seamless integration with vehicle safety systems—a critical part of heavy duty truck brake parts.

2. Ensures responsive actuation of braking systems, maintaining consistent performance under heavy loads and long downhill runs.

3. Resists false triggering, maintaining reliable control even under extreme vibration and temperature fluctuations.

4. Fully OEM-compatible for seamless replacement, restoring the automatic braking control function of the vehicle.

Auto-Brake Switch 812W25503-6076 for Sinotruk Sitrak Heavy Duty Trucks

When your heavy-duty truck’s braking system demands precision and reliability, every component matters. The Auto-Brake Switch 812W25503-6076 is a genuine OEM brake control switch engineered specifically for Sinotruk Sitrak commercial vehicles. Built to withstand the punishing demands of heavy-load operations, this switch delivers responsive, consistent braking control — mile after mile, load after load. Whether you’re sourcing replacement parts for fleet maintenance or stocking your warehouse for resale, this auto-brake switch offers the exact-fit performance your customers expect.

Key Features and Benefits of the 812W25503-6076 Auto-Brake Switch

This isn’t just another switch sitting on a shelf. Every detail of the 812W25503-6076 auto-brake switch is purpose-built for the rigors of commercial trucking. Here’s what sets it apart:

• OEM-Grade Precision: Manufactured to exact Sinotruk Sitrak specifications, ensuring seamless integration with original braking systems without any modification.
• Robust Housing Construction: The durable black plastic housing resists heat, vibration, and moisture — three of the most common enemies in a truck’s undercarriage environment.
• Compact Rocker-Style Actuator: Designed for quick, tactile engagement, the rocker actuator ensures drivers get immediate feedback when activating automatic braking functions.
• Sealed Internal Mechanism: A fully sealed design keeps dust, debris, and moisture out, significantly extending service life even in harsh operating conditions.
• Reliable Signal Output: Delivers clean, consistent electrical signals to the braking ECU, minimizing the risk of false triggers or delayed responses.
• Direct Drop-In Replacement: Plug-and-play installation means less downtime for your fleet and faster turnaround on repairs.

In other words, this switch doesn’t just work — it works reliably, which is exactly what matters when thousands of kilograms are rolling down the highway.

Technical Specifications

Accuracy matters when you’re sourcing the right part. Below you’ll find the detailed specs for the Auto-Brake Switch 812W25503-6076:

Application Scenarios: Where Does This Auto-Brake Switch Fit?

Understanding exactly where and when this part is needed helps you make a confident purchasing decision. The 812W25503-6076 auto-brake switch is designed for the following applications:

• Compatible Truck Models: Sinotruk SITRAK C7H, Sinotruk SITRAK C5H, and related Sinotruk heavy-duty platforms equipped with automatic braking systems.
• System Application: Automatic braking control system — responsible for transmitting brake activation signals to the vehicle’s electronic control unit.
• Component Category: Electrical braking accessories, brake signal switches, cab-mounted control switches.
• Common Replacement Scenarios: Switch failure causing brake warning lights, unresponsive auto-brake function, intermittent braking signal loss, or post-accident component replacement during maintenance and repair.

If your truck’s automatic braking function has become unreliable or completely unresponsive, chances are this switch is the culprit — and replacing it restores full system functionality immediately.

Looking for more Sitrak braking components? Browse our full braking system parts catalog or explore the complete Sitrak heavy-duty parts collection for everything you need in one place.

OEM and ODM Capabilities

At Mettlead, we understand that different markets have different needs. That’s why we go beyond simply shipping parts — we offer flexible solutions tailored to your business:

• White-Label Packaging: Want to sell under your own brand? We provide neutral or fully customized packaging that matches your identity — no minimum branding requirements.
• Custom Packaging Options: From individual poly bags to branded retail boxes, we accommodate your packaging specifications for B2B distribution or aftermarket retail.
• Strict Quality Control: Every single auto-brake switch 812W25503-6076 passes through multi-stage inspection before leaving our facility, including dimensional checks, electrical continuity testing, and seal integrity verification.
• Factory-Direct Pricing: By sourcing directly from our manufacturing base in China, you eliminate middlemen and protect your margins — especially valuable for bulk procurement.
• Flexible MOQ: Whether you need a trial order of 10 pieces or a container load of 10,000, we work with your volume requirements.

Need a comprehensive overview of all available Sinotruk Sitrak components? Visit our Sinotruk Sitrak truck parts full category guide to explore the complete product range.

Frequently Asked Questions (FAQ)

What exactly does the auto-brake switch 812W25503-6076 do?

This switch serves as the primary control input for the automatic braking system. When engaged, it sends an electrical signal to the brake ECU, activating the automatic braking function. Think of it as the bridge between the driver’s intention and the truck’s braking response.

How do I know if my 812W25503-6076 auto-brake switch needs replacement?

Common signs include: the auto-brake function not engaging when the switch is activated, intermittent braking response, dashboard brake warning indicators illuminating without cause, or visible physical damage (cracked housing, loose connector). If the switch feels “soft” or unresponsive to the touch, internal wear is likely the issue.

Is this auto-brake switch an original OEM part or aftermarket?

This is an OEM-equivalent replacement part manufactured to the same dimensional and electrical specifications as the original Sinotruk component. It provides identical fit, function, and longevity at a more competitive price point compared to dealer-sourced originals.

Can I install the 812W25503-6076 switch without professional tools?

Yes. Because this is a direct drop-in replacement, installation is straightforward. Simply disconnect the old switch connector, remove it from the mounting position, insert the new unit, and reconnect the wiring harness. No special calibration or programming is required — the truck’s system recognizes it immediately.

What is the expected service life of this brake switch?

Under normal operating conditions, this sealed switch is rated for the same service interval as the original component — typically lasting the equivalent of 200,000+ kilometers before wear-related issues emerge. The sealed design actively protects against premature failure from environmental contaminants.

Does this switch work on trucks other than Sitrak models?

The part number 812W25503-6076 is specifically designated for Sinotruk Sitrak platforms. While the physical form factor may appear similar to switches used on other Sinotruk models (like HOWO), cross-compatibility is not guaranteed without verifying your vehicle’s exact part number requirement.

Ready to Source Your Auto-Brake Switch 812W25503-6076?

Every day your truck sits idle waiting for parts is money lost. At Mettlead, we keep the Auto-Brake Switch 812W25503-6076 for Sinotruk Sitrak in stock and ready to ship — with factory-direct pricing that protects your bottom line.

Here’s what you get when you work with us:

• Competitive factory-direct pricing with no middlemen
• Fast, reliable global shipping to your door
• Flexible and secure payment methods
• Full product range for Sinotruk, Sitrak, HOWO, Shacman, FAW, Weichai, Dongfeng, and Foton
• Open invitation to visit our facility for inspection

Get your quote today. Send us your part number, required quantity, and destination — and our team will respond with pricing and lead time within 24 hours.

👉 Contact us now to request a quote for the 812W25503-6076 Auto-Brake Switch