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Wabco  |  SKU: S4008500720

S4008500720 | Genuine Wabco ABS / PABS ECU Module

$1,49900
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Part Number: S4008500720
Condition: New
Manufacture/Brand: Wabco
Related Part Numbers: TDAS4008601020, 4008600000

Description:
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

Fits For 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 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 the Manufacturer – 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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