If you’re wondering what EPB means in a car and how it works, you’re not alone. Electronic Parking Brakes have become a standard feature in modern vehicles, offering safer, smarter, and more convenient braking control during both driving and parking.
1. What Is an Electronic Parking Brake (EPB)?
An Electronic Parking Brake (EPB) is an upgraded, electronic version of the traditional handbrake. Instead of pulling a lever, the driver simply presses a switch. The system uses an ECU-controlled motor or actuator to apply braking force—usually to the rear wheels—for temporary holding or long-term parking.
EPB systems are generally divided into two main types:
• Cable Puller System
This design functions like a traditional handbrake but replaces the mechanical lever with an electronic switch. It tightens brake pads using cables and works with both disc and drum brakes. It’s cost-effective and suitable for vehicle upgrades.
• Caliper-Integrated System
This system uses an electric motor inside the brake caliper to clamp or release the brake pads. No cables or levers are used. While more expensive, it delivers faster response and higher reliability. It is compatible only with disc brakes.
2. How Does EPB Work?
Traditional parking brakes rely on a cable that tightens brake pads when the lever is raised.
The Electronic Parking Brake, however, integrates:
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An Electronic Brake Module
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Actuators or electric motors
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An EPB switch inside the cabin
When the driver presses the EPB switch:
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A command is sent to the Electronic Brake Module.
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The module activates the motors or actuators.
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The calipers clamp the brake disc.
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The wheels lock and the vehicle is secured.
With no mechanical cables to wear out, EPB systems are more reliable, require less manual effort, and offer consistent braking performance.
3. Why Do You Need an EPB Release Tool?
When replacing brake pads on a vehicle equipped with EPB, the brake calipers must be electronically released into service mode to create enough space for removal and installation.
This cannot be done manually.
You need an EPB release tool, usually an OBD2 diagnostic scanner, to:
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Command the EPB system to open the calipers
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Allow safe removal of the brake pads
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Reset the system after installation
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Re-engage the calipers into working position
Without the proper release function, forcing the calipers open may damage the actuator or motor—leading to costly repairs.
4. Best XTOOL Scanners With EPB Service Functions
Modern OBD2 scanners make EPB maintenance simple, especially those equipped with bi-directional control and dedicated service modes.
The following XTOOL scan tools are highly recommended for EPB release, EPB service mode, and full-system diagnostics:
XTOOL A30M – Powerful Budget EPB Tool
A compact, app-based scanner with bi-directional control, EPB service mode, code reading, live data, and over 20 maintenance functions. Ideal for DIY users who want an affordable, wireless EPB tool with strong performance.
XTOOL IP616 – Touchscreen Tablet With Advanced Diagnostics
Equipped with a fast processor, intuitive touchscreen, and extensive vehicle coverage, the IP616 offers OE-level EPB maintenance, active tests, and detailed system scanning. A great choice for home mechanics and small shops.
XTOOL D7 – Full-System Diagnostics + EPB Release
The XTOOL D7 delivers pro-level EPB service, brake pad reset, full-system scanning, and bi-directional control. Its large screen and fast response make it a reliable tool for both DIY users and professionals.
Final Thoughts
Choosing the right Electronic Parking Brake release tool is essential for safe and efficient brake pad replacement. Whether you’re a DIY enthusiast or a professional technician, the XTOOL A30M, IP616, and D7 offer dependable EPB service modes, accurate diagnostics, and user-friendly interfaces that simplify brake maintenance.
If you have questions or need help selecting the right tool, feel free to leave a comment or reach out anytime.