LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Audi >> 2009 >> A4 Avant Quattro >> Repair and Diagnosis (Single Page) >> Brakes >> Traction Control >> Anti-Lock Brake System (AVANT) >> Anti-Lock Brake System >> Description And Operation >> Abs Hydraulic Unit With Abs Control Module Assembly Overview
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Abs Hydraulic Unit With Abs Control Module Assembly Overview

Fig 1: ABS Hydraulic Unit With ABS Control Module Assembly Overview
GWWA45-10101Courtesy of AUDI OF AMERICA, LLC
  1. ABS Hydraulic Unit -N55- with ABS Control Module -J104-
    • Component location: In left of the engine compartment.
    • Removing and Installing ABS HYDRAULIC UNIT WITH ABS CONTROL MODULE .
    • The hydraulic control unit is comprised of the ABS Hydraulic Unit -N55- with integrated Brake Pressure Sensor 1 -G201- and ABS Control Module -J104-.
    • The components must not be separated from each other.
    • Do not disconnect connector before successfully completing OBD.
    • Switch ignition off before disconnecting connector.
    • The Brake Pressure Sensor 1 -G201- is integrated into ABS Hydraulic Unit -N55- and cannot be replaced.
      CAUTION:

      The ABS Hydraulic Unit -N55- and ABS Control Module -J104- must not be separated from each other.

  2. ESP bracket
    • The bracket cannot be removed.
  3. ABS control module J104 electrical connector
  4. Brake line
    • To brake master cylinder.
    • 14 Nm
  5. Brake line
    • To brake master cylinder.
    • 14 Nm
  6. Brake lines
    • Hydraulic unit to right front brake caliper
    • 14 Nm
    • Hydraulic unit to left front brake caliper
    • 14 Nm
    • Hydraulic control unit to left rear brake caliper
    • 14 Nm
    • Hydraulic control unit to right rear brake caliper
    • 14 Nm