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.
Hydraulic Control Unit (HCU): Removal
HCU is located in front of booster. Remove battery box, battery tray, and battery. Unplug connectors from solenoid valves. Remove locking pin and connector from motor pack. Taking care not to bend brakelines, remove brakeline fittings. Plug openings. Remove hydraulic control unit nuts. Working carefully to avoid bending brakelines, remove control unit. See Figure .
Use the Manual With the Right Hardware
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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.
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