Hydraulic Power Steering Gear, Servicing

WARNING: This page does not describe the selected car, but rather 18 other vehicles, including the 2016 Audi S4, 2016 Audi A4 Quattro, 2016 Audi A4, 2015 Audi S4, and 2015 Audi A4 Quattro. However, it is still accessible from the selected car via links, so may be relevant.

Special tools and workshop equipment required

Torque Wrench 1332 40-200Nm VAG1332
Hose Clip Pliers VAG1921
Locking Pliers VAS6199
Steering Gear Grease

NOTE:

Always replace self-locking nuts and bolts.

Welding or straighten work on any steering components is not permissible.

To grease the rack, only use Steering Gear Grease.

Fig 1: Hydraulic Power Steering Gear, Servicing

Courtesy of AUDI OF AMERICA, LLC

Tie Rod End
- There are different versions, with long or short thread on the joint pin .
  WARNING:
  When replacing, make sure the length of the thread on the tie rod end is sufficient (there must be approximately 5 mm extra thread). If this is not the case, then install a tie rod end with a longer thread pin .
- Check dust caps for damage and correct seating
- Removing and installing. Refer to HYDRAULIC POWER STEERING GEAR TIE ROD END, REMOVING AND INSTALLING .
Nut
- 60 Nm
Spring Clamp
- Always replace if removed
- Allocate correct version.
Boot
- Check for damage
- Do not twist after adjusting the toe
- Can be replaced with steering gear installed
- Replacing. Refer to HYDRAULIC POWER STEERING GEAR BOOT, REMOVING AND INSTALLING .
Clamp
- Always replace if removed
- Clamping Sleeves, Installing. Refer to Installing - "Clamping Sleeves, Installing"
Tie Rod
- 90 Nm
- Removing and installing. Refer to HYDRAULIC POWER STEERING GEAR TIE ROD, REMOVING AND INSTALLING .
- Grease joint with Steering Gear Grease.
Power Steering Gear
- Grease joint with Steering Gear Grease.
- There are different versions.
Strainer
- Always replace if removed
Seal
- Always replace if removed
Seal
- Always replace if removed
Servotronic Solenoid Valve -N119-
- Removing and installing. Refer to Servotronic Solenoid Valve -N119-, REMOVING AND INSTALLING .
- The following values can be selected on the Vehicle Diagnostic Tester:
  - Speed signal
  - The voltage supply from Vehicle Electrical System Control Module 2 -J520-
  - Solenoid Valve -- status
  - The current values for the Solenoid Valve -- activation
  -- Connect the Vehicle Diagnostic Tester and select Fault Finding with "Functions/Component selection".
  
  -- Then "Body".
  
  -- Select "Electrical System".
  
  -- "01- On Board Diagnostic (OBD) Capable Systems".
  
  -- "Vehicle Electrical System Control Module".
  
  -- "Electrical Components".
  
  -- "Servotronic Solenoid Valve".
Bolt
- 3 Nm
  CAUTION:
  - Always follow screw tightening sequence.
- Tightening sequence. Refer to Servotronic Solenoid Valve -N119-, REMOVING AND INSTALLING