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Wabco  |  SKU: 4008500140

4008500140 | Genuine Wabco ABS / PABS ECU Module

$1,49900
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ConditionNew
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365-day / 100,000-mile limited warranty on U.S. orders. Return conditions apply. Mandatory legal rights remain unaffected.

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An ABS / PABS ECU is the electronic control unit (ECU) that manages the Anti-lock Braking System (ABS) — or in some cases, a Partially Automated Braking System (PABS) — in vehicles, especially trucks, trailers, and buses. ABS / PABS ECU Module E4F 4S4M, 12V

General Specifications

Condition New
Part Number 4008500130
Brand Wabc
Fits heavy commercial / medium duty trucks, including Freightliner, Volvo, Mack and other OEMs that use WABCO ABS systems.

Specifications

Calculated Volume (dm³) 4.893
Distance between holes 6.81x5.28 in
Mounting 3x Ø 6.8 mm
System 4S/4M
Technical specification OE specification
Temperature range -40°C to +75°C
Type PABS ECU E4F
Voltage 12 V

Purpose & Function

Function Description
Wheel speed monitoring Detects if a wheel is decelerating too quickly (locking up)
Brake modulation Controls valves to adjust brake pressure to prevent lockup
Diagnostics Stores fault codes (e.g., faulty sensors, wiring, solenoids)
Safety override Prevents unsafe braking behavior on slippery or uneven surfaces

Signs of a Faulty ABS / PABS ECU Module

ABS warning light stays on

  • Brakes feel locked or unstable during panic stops
  • No ABS function on slippery surfaces
  • Stored fault codes for sensors or modulators
  • Loss of communication with the ECU via diagnostic tools

About Wabco

WABCO (originally the Westinghouse Air Brake Company) is a global leader in vehicle control systems for commercial vehicles such as trucks, buses, and trailers. Founded in 1869 and later becoming a part of ZF Friedrichshafen AG in 2020, WABCO is best known for pioneering advanced braking, stability, and suspension technologies.

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