LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Volkswagen >> 2012 >> Passat TDI SE, Standard Trans >> Repair and Diagnosis >> External Pages >> Different car >> Section 89 (Antilock Brake System) >> 45 Antilock Brake System >> Description And Operation >> Control Module And Hydraulic Unit Overview
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Control Module And Hydraulic Unit Overview

WARNING: This page does not describe the selected car, but rather 7 other vehicles, including the 2018 Volkswagen Tiguan Limited, 2017 Volkswagen Tiguan, 2016 Volkswagen Tiguan, 2015 Volkswagen Tiguan, and 2014 Volkswagen Tiguan. However, it is still accessible from the selected car via links, so may be relevant.

Anti-lock Brake System (ABS)/Electronic Differential Lock (EDL)/Anti-Slip Regulation (ASR)/Electronic Stabilization Program (ESP), TRW

Fig 1: Identifying Control Module And Hydraulic Unit Assembly Overview
GWWN45-10142Courtesy of VOLKSWAGEN GROUP OF AMERICA, INC.
  1. Brake Booster
  2. Brake Line
    • Master brake cylinder/primary piston circuit to hydraulic control unit
    • Identification: diameter 6.5 mm and tube fitting with longer thread M12 x 1
    • Marked on hydraulic unit with HZ1
  3. Brake Line
    • Master brake cylinder/secondary piston circuit to hydraulic unit
    • Identification: diameter 6.5 mm and tube fitting with longer thread M12 x 1
    • Marked on hydraulic unit with HZ2
  4. Brake Line
    • To right front brake caliper
    • Identification: diameter 5.25 mm and tube fitting with thread M 10 x 1
    • Marked on hydraulic unit with VR
  5. Brake Line
    • To left rear brake caliper
    • Identification: diameter 5.25 mm and tube fitting with shorter thread M12 x 1
    • Marked on hydraulic unit with HL
  6. Brake Line
    • To right rear brake caliper
    • Identification: diameter 5.25 mm and tube fitting with thread M 10 x 1
    • Marked on hydraulic unit with HR
  7. Brake Line
    • To left front brake caliper
    • Identification: diameter 5.25 mm and tube fitting with shorter thread M12 x 1
    • Marked on hydraulic unit with VL
  8. ABS Control Module -J104-

    It is not possible to separate the control module and hydraulic unit.

  9. ABS Hydraulic Unit -N55-

    It is not possible to separate the control module and hydraulic unit.

  10. Bracket
  11. Inner TORX® Bolt
    • 8 Nm
  12. Rubber Insulation