Hyundai Elantra: Removal
Turn the ignition switch OFF.
Pull up the lock of the HECU connector (A) , then disconnect the connector.
Remove the brake fluid from the master cylinder reservoir with a syringe.
Disconnect the brake tubes from the HECU by unlocking the nuts counterclockwise with a spanner.
Loosen the HECU bracket bolts (A), then remove HECU and bracket.
Remove the 3 bolts, then remove the bracket from HECU.