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Home >> Audi >> 2023 >> S3 Premium Plus >> Repair and Diagnosis >> Brakes >> Traction Control >> Antilock Brake System >> 45 Antilock Brake System >> Control Module And Hydraulic Unit >> Overview - Control Module And Hydraulic Unit
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Overview - Control Module And Hydraulic Unit

Fig 1: Exploded View Of Control Module And Hydraulic Unit
GWWA45-10196Courtesy of AUDI OF AMERICA, LLC
  1. Bracket
    • There are different versions. Refer to the Parts Information.
  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

Brake lines tightening using special tools

Fig 2: Brake Lines Tightening Using Special Tools
GWWN45-10338Courtesy of AUDI OF AMERICA, LLC

Special tools and workshop equipment required 

Heat shield with threaded connection

Fig 3: Heat Shield with Threaded Connection
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.