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Overview - Control Module And Hydraulic Unit

WARNING: This page is about a different car, the 2025 Audi S3, 2025 Audi RS 3, and 2025 Audi A3 Quattro. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: Control Module And Hydraulic Unit
GWWA45-10196Courtesy of AUDI OF AMERICA, LLC
  1. Bracket
    • There are different versions. Refer to the Electronic Parts Information (ETKA).
  2. Nut
    • 20 Nm
  3. Rubber Bushing
  4. Mounting Bracket
  5. ABS Hydraulic Unit -N55-
  6. ABS Control Module -J104-
  7. Brake Line
    • From brake master cylinder to the hydraulic unit
    • Identification: 5.25 mm diameter and union bolt with M10x1 thread
    • Tightening Specifications
      • With standard tool: 14 Nm
      • With special tool Refer to Fig 2 12 Nm
  8. Brake Line
    • From brake master cylinder to the hydraulic unit
    • License plate: 6 mm diameter and union bolt with M12x1 thread
    • Tightening Specifications
      • With standard tool: 14 Nm
      • With special tool Refer to Fig 2 12 Nm
  9. Torx Bolt
    • Replace after removing
    • Tighten the new Torx bolts in two steps, switching back and forth.
      • Step 1: temporary tightening specification: 1 Nm to 1.5 Nm (to install the seal)
      • Step 2: final tightening specification: 2.5 Nm
  10. Heat Shield
    • Attached version
    • Bolted version. Refer to Fig 3.
    • Installed, depending on the version
  11. Bolt
    • 8 Nm
Fig 2: Brake Lines Tightening Using Special Tools
GWWN45-10338Courtesy of AUDI OF AMERICA, LLC

Special tools and workshop equipment required 

Fig 3: Heat Shield - Threaded Version
GWWA45-10350Courtesy of AUDI OF AMERICA, LLC

-- Tighten the nut -1- for the heat shield -2- to 8 Nm.

-- Press on the bracket for the lock washer -3- all the way.