Automatic Side Steps

-- Steady & Reliable Manufacturer --

Product Description

Automatic Side Steps, also known as power boards or electric side steps, are a fully integrated active running board system. The defining characteristic is their ability to deploy and retract automatically in response to user interaction with the vehicle, creating a dynamic and convenient entry/exit experience. Unlike fixed side steps, they eliminate aerodynamic drag during highway driving and reduce the risk of damage from curbs or off-road obstacles.

The system's intelligence lies in its control module, which processes inputs such as door ajar signals, vehicle speed data (often via the OBD-II port or CAN bus), and gear selection. Upon receiving a valid "unlock" or "door open" signal while the vehicle is stationary, it commands the actuator motors to extend the steps. Closure of all doors triggers the retraction sequence.

Technical Deep Dive

Actuation is achieved via a high-efficiency worm gear drive coupled with a DC motor. This design provides self-locking when powered off, preventing the step from sagging under load. The linkage is designed with sealed bearings for smooth operation. The system includes diagnostic LEDs for troubleshooting and can be programmed for features like delayed retraction or welcome light mode. Electromagnetic compatibility (EMC) is tested to ensure no interference with other vehicle electronics.

Introduction

Automatic Side Steps represent a convergence of practical utility and modern automotive technology. They are engineered not just as an accessory, but as an intelligent extension of the vehicle's functionality, simplifying access while complementing its design language.

Bohai Auto Technology: Focus on Innovation

Since our founding in 2014, Bohai Auto Technology has concentrated on refining electromechanical systems for vehicles. Our R&D team, comprising over 40 technical personnel and external experts, focuses on reliability engineering—ensuring that moving parts like those in Automatic Side Steps perform consistently over tens of thousands of cycles.

Our production process leverages automation for precision and repeatability. The CNC machining centers ensure bracket and linkage components meet tight tolerances, while the in-house performance testing center subjects every motor and control unit to cycle, load, and environmental stress screening.

This disciplined approach to design and manufacturing allows us to produce Automatic Side Steps that meet the expectations of the global aftermarket for durability and seamless operation.

Primary Applications

Full-Size and Luxury SUVs: Vehicles like the Mercedes-Benz GLS, BMW X7, and Audi Q8, where a high step-in height is common and a premium entry experience is valued.
Vehicles Used by Diverse Age Groups: Perfect for families or vehicles used by individuals with varying mobility, as the step automatically presents itself when needed.
Urban & Highway Drivers: The retracted state offers a clean look and avoids the "splash" and dirt accumulation associated with fixed steps.

Secondary & Niche Applications

Show and Custom Vehicles: Adds a "wow factor" with its automatic movement, enhancing the vehicle's technological appeal.
Commercial Passenger Transport: For modified vans or shuttles (e.g., Mercedes Vito), facilitating quick and easy passenger boarding.
Export to Regions with High SUV Penetration: Key markets include North America, the Middle East, Australia, and Russia, where SUVs and pickups dominate.

Specification Table

Model	BHT-ASS3000 Series (Multiple Fitments)
Power Supply	DC 12V, 15A Max Current Draw (per side during movement)
Actuator Type	Worm Gear DC Motor Actuator with Position Feedback
Deployment Range	180mm - 220mm from vehicle rocker panel (model dependent)
Dynamic Load Rating	150 kg (330 lbs) during extension/retraction cycle
Frame Material	Main Frame: Q235 Steel; Arms: 6061 Aluminum Forging
Step Pad	Replaceable Polymer Composite with Diamond Pattern
Control Interface	CAN 2.0B or Direct Door Trigger (Harness Included)
Noise Level	< 48 dB(A) at 1-meter distance
Ingress Protection	IP67 (Motor/ECU), IP65 (Linkage Joints)
Certifications	CE, RoHS Compliant; EMC Tested per ISO 7637-2
Software Features	Speed Lockout (>8 km/h), Obstacle Detection, Welcome Light Sync

Q: How does the system know when to deploy?
A: It uses the vehicle's electrical signals. Most common is the "door open" signal from the door latch. For more advanced integration, it connects to the CAN bus network and reads door status, lock status, and vehicle speed directly.

Q: Can I install this myself?
A> While technically inclined individuals can follow our comprehensive guide, professional installation is highly recommended. It involves electrical connections, precise alignment, and often vehicle-specific programming, which a qualified auto electrician is best suited to handle.

Q: What if the step hits an obstacle while retracting?
A: The control unit monitors the motor current. A sudden increase in current (indicating an obstruction) triggers an immediate stop and brief reversal of direction, then a re-attempt. This anti-pinch feature protects objects, pets, or fingers.

Q: Does it work in extremely cold climates?
A> The system is rated for -30°C operation. In severe ice conditions, ice buildup on the step or linkage could impede movement. Keeping the step area clear is advised. The motor's built-in overload protection will prevent damage if movement is blocked.

Key Advantages

Fully Automated Convenience: Requires no user input; operation is tied directly to vehicle door status, offering a hands-free experience.
Enhanced Vehicle Clearance: When retracted, ground clearance is maximized, beneficial for parking lot curbs, speed bumps, and light off-road travel.
Integrated Safety Logic: Speed-sensing lockout prevents deployment while the vehicle is in motion, and obstacle detection ensures safe retraction.
OEM-Level Integration: The use of vehicle communication protocols (CAN) allows for a more refined and reliable operation compared to simple switch-based systems.

Engineering Core

Durable Drive System: The worm gear mechanism provides high mechanical advantage and is inherently self-locking, ensuring the step remains firmly in position when deployed, even under load.
Optimized Deployment Arc: The linkage geometry is calculated to provide a stable, wide step surface at the optimal height relative to the vehicle's floor sill.
Serviceable Design: Key wear components like step pads and rubber bushings are designed to be replaceable without removing the entire assembly, simplifying long-term maintenance.

Production Capacity

Our assembly line for Automatic Side Steps is semi-automated, with stations for frame welding, actuator installation, wiring harness assembly, and final dynamic testing. We maintain a stock of common vehicle-specific bracket kits and can produce 300-400 complete sets per day at full capacity. All ECUs are programmed and tested on a vehicle communication simulator before installation.

Customization Services (ODM/OEM)

Deployment Speed & Sound Profile: Motor gearing and software can be tuned to achieve a specific extension speed or a quieter operation for luxury applications.
Step Lighting Integration: We can integrate LED light strips into the steps, synchronized to deploy with the step or act as puddle lights. Color and brightness are customizable.
Control Logic Customization: Programming unique sequences, such as deploying only the driver's side step when only the driver's door is opened, or adding a remote-control function via an added fob.
Packaging for Retail: Designing retail-ready boxes with clear graphics, multilingual manuals, and all necessary hardware organized in labeled bags for easier installation.
Bulk SKU Configuration: Creating mixed pallets with different vehicle models for distributors to optimize their inventory of best-selling fitments.

Material Selection Overview

Material choices for Automatic Side Steps prioritize strength for moving parts, corrosion resistance for longevity, and weight optimization.

Structural Frame (Q235 Steel): The main mounting bracket and central frame use powder-coated mild steel for its high tensile strength and rigidity, which is crucial for supporting dynamic loads and withstanding road vibrations.
Moving Arms (6061 Aluminum Forging): The swinging arms are often forged 6061 aluminum. Forging provides superior grain structure and strength compared to casting or extrusion, essential for parts undergoing repetitive stress. It also keeps weight down.
Step Pad (Polymer Composite): The step surface uses a glass-reinforced polyamide (nylon) or similar composite. This material is lightweight, extremely wear-resistant, retains its grip texture, and does not corrode. It can be molded into complex, highly anti-slip patterns.
Fasteners: All exposed bolts and nuts are stainless steel (A2-70 or A4-80 grade) to prevent seizing and rust.

about Bohai

R&D and manufacturing of mid-to-high-end SUV electric pedals.

Bohai Automotive Technology (Zhejiang Huzhou) Co., Ltd. was established in 2014. It is a technology-based enterprise specializing in R&D China Automatic Side Steps Manufacturers and Wholesale Automatic Side Steps Suppliers The company is located on the southern bank of the beautiful Taihu Lake in the hinterland of the Yangtze River Golden Triangle-Changxing County, Huzhou City, Zhejiang Province. It is about 150 kilometers away from Shanghai, Hangzhou, Nanjing, Ningbo, Suzhou, Wuxi and other large and medium cities.

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