Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Antilock Brake System: Notes
This vehicle uses an antilock brake system designated MK25e. For this vehicle, MK25e is standard with Electronic Stability Program (ESP) and All-Speed Traction Control.
This antilock brake system uses components of the base brake system, but also features the following components:
- Integrated Control Unit (ICU) - Hydraulic Control Unit (HCU) (2) and Antilock Brake Module (ABM) (1)
- Wheel Speed Sensors (WSS) - Four sensors (one at each wheel)
The MK25e ICU is made up of the Hydraulic Control Unit (HCU) and the Antilock Brake Module (ABM). For additional information on these components, see Brakes/Hydraulic/Mechanical/HYDRAULIC CONTROL UNIT (HCU) - Description . Refer to Electrical - Electronic Control Modules/Electronic Control Modules/MODULE, Anti-Lock Brake System - Description .
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.