Repair procedures: Removal

Turn the ignition switch OFF and disconnect the negative (-) battery cable.
Remove the engine room junction box and bracket.

Fig 1: Engine Room Junction Box And Bracket
Courtesy of HYUNDAI MOTOR AMERICA
Disconnect the brake tubes from the HECU by unlocking the nuts counterclockwise with a spanner.
Tightening torque:

ABS: 12.7 ~ 16.7 N.m (1.3 ~ 1.7 kgf.m, 9.4 ~ 12.3 lb-ft)

ESC: 18.6 ~ 22.6 N.m (1.9 ~ 2.3 kgf.m, 13.7 ~ 16.6 lb-ft)

Fig 2: HECU And Brake Tubes
Courtesy of HYUNDAI MOTOR AMERICA
Pull up the lock of the HECU connector, then disconnect the connector.
Loosen the HECU bracket bolt (3EA), then remove HECU and bracket.
Tightening torque:

16.7 ~ 25.5 N.m (1.7 ~ 2.6 kgf.m, 12.3 ~ 18.8 lb-ft)

Fig 3: HECU, Bracket And Bolts
Courtesy of HYUNDAI MOTOR AMERICA
CAUTION:
1. Never attempt to disassemble the HECU.
2. The HECU must be transported and stored in.
3. Never shock to the HECU.
Remove the 3 bolts, then remove the bracket from HECU.
Tightening torque:

10.8 ~ 13.7 N.m (1.1 ~ 1.4 kgf.m, 8.0 ~ 10.1 lb-ft)