Overview - Control Module And Hydraulic Unit

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NOTE:

If the ABS Control Module -J104- is faulty, it can be replaced separately.

If the ABS Hydraulic Unit -N55- is faulty, it must be replaced together with the ABS Control Module -J104-.

Control Module and Hydraulic Unit

Fig 1: Exploded View Of ABS Control Module And ABS Hydraulic Unit

Courtesy of AUDI OF AMERICA, LLC

Nut
- 3.8 Nm
- Replace after removing.
- Self-locking
Bracket
Nut
- 3.8 Nm
- Replace after removing.
- Self-locking
Rubber Bushing
Mounting Bracket
Bolt
- Tighten in two steps alternating from side to side.
- Step 1: 1 to 1.5 Nm (to install the seal)
- Step 2: 2.5 Nm
ABS Control Module -J104-
NOTE:
If the ABS Control Module -J104- is faulty, it can be replaced separately.

If the ABS Hydraulic Unit -N55- is faulty, it must be replaced together with the ABS Control Module -J104-.
- Refer to ABS Control Module -J104- /ABS Hydraulic Unit -N55-, REMOVING AND INSTALLING
- Can be replaced separately if faulty.
- Refer to CONTROL MODULE, SEPARATING FROM HYDRAULIC UNIT
- Refer to CONTROL MODULE, INSTALLING ON HYDRAULIC UNIT
ABS Hydraulic Unit -N55-
NOTE:
If the ABS Control Module -J104- is faulty, it can be replaced separately.

If the ABS Hydraulic Unit -N55- is faulty, it must be replaced together with the ABS Control Module -J104-.
- Refer to ABS Control Module -J104- /ABS Hydraulic Unit -N55-, REMOVING AND INSTALLING
Brake Line
- 14 Nm
- 5.25 mm diameter and union bolt with M12x1 thread
- To the brake caliper
Brake Line
- 14 Nm
- From brake master cylinder to the hydraulic unit
- 6 mm diameter and union bolt with M12x1 thread
Bolt
- 25 Nm
Bolt
- 3.8 Nm
- Replace after removing.
- Self-locking

ABS Control Module -J104-

Fig 2: Identifying Pressure Sensor Contact, Pressure Sensor, Seal, Valve Bodies And Pump Motor Contact

Courtesy of AUDI OF AMERICA, LLC

Pressure Sensor Contact
- Do not touch the contact
- The illustration depends on the model
Pressure Sensor
- Must not be changed or damaged
- Cannot be replaced
- The illustration depends on the model
Seal
- Do not remove or lift
- Cannot be replaced separately
Valve Body
- Must not be damaged
- Do not use any tools
Pump Motor Contact
- Must not be damaged