Install The Catalytic Converter Unit

Use the new nuts and gaskets. 

Connect the pipe to the engine. Use a mobile jack with universal plate 9995972 as support.

Connect to the rear exhaust pipe. Install all nuts loosely.

Install the screws for the front SIPS member.

Remove the mobile jack.

First tighten the exhaust pipe flange to the engine. Then tighten the rear flange. Tighten crosswise. Tighten to 25 Nm  .

Install the rear SIPS member.

Tighten the SIPS member screws to 25 Nm  .

(The illustration is not accurate because the pulsed secondary air injection system (PAIR) pump is discontinued.)

Connect the heated oxygen sensors (HO2S) connectors according to markings made earlier.

Secure heated oxygen sensor (HO2S) wiring in subframe.

Press the brake pipe into place on the front SIPS member.

Install 

• the lower oil cooler hose to the transmission
• the lower radiator hose.

Tighten the ball joint / control arm. See: Summary of tightening torques for specific components . Counterhold using Torx 40 so that the ball joint boot does not rotate.

Install 

• the tie rods. Use new locknuts  . Tighten to 70 Nm  .
• the anti-roll bar links. Use new locknuts  . Tighten to 50 Nm  .
• new center screws for the drive shafts  . Tighten to 50 Nm  .
• ABS sensors. Tighten to 10 Nm  .
  NOTE:

  Ensure that the ABS sensor seats are absolutely  clean.

• the cable for the ABS sensor in the mounting in the spring strut
• the brake pipe bracket in the wheel arch.

Install 

• the front splash guard
• the splash guard under the engine
• the wheels. See Installing wheels .

• the bearing in the lower steering shaft. Secure it in the rubber boot using a tie strap
• the steering shaft joint in the lower steering shaft. Use a new screw and locknuts  . Tighten to 30 Nm  .
  NOTE:

  Previous measurement for correct steering gear position.

• the panel under the dashboard.

• the air conditioning (A/C) compressor. Tighten to 25 Nm  .
• the connector to the dryer bottle
• the magnetic clutch connector with the engine wiring
• the auxiliaries belt
• the hose between the charge air cooler (CAC) and the turbocharger (TC) pipe. Applies only to B6xx4T  .
• the upper radiator hose.

Connect the engine and transmission wiring connectors to the control module box base plate.

Press the base plate into place in the lower section of the control module box.

Install the intermediate section.

Locate the ventilation pipe in the rear edge of the control module box.

Screw the control module box into place in the fender liner.

Press the control modules down carefully. Lock into place using mounting bracket 9995722 .

Press the cover into place. Screw the ground cable into place.

Install 

• the expansion tank. Connect the hose from the radiator to the expansion tank
• the servo reservoir.

• the fan shroud on the radiator
• the connectors to the engine cooling fan (FC), evaporative emission system (EVAP) valve and pulsed secondary air injection system (PAIR) pump
• the wiring to the terminal block.

Secure the wiring.

• the charge air pipe to the charge air cooler (CAC). Applies only to B6xx4T  .
• the upper oil cooler hose to the transmission
• the transmission cable to the transmission.

• the air intake pipe to the air cleaner (ACL) housing in the fan shroud
• the brake servo hose to the intake manifold
• the air cleaner (ACL) housing with all connections.

• the positive cable to the positive terminal block
• the engine stabilizer brace between the suspension turrets. Tighten to 50 Nm  .
• the engine stabilizer brace mounting on the engine. Use a new screw and nut  . Tighten to 80 Nm  .
• the negative battery cable. First read Battery, disconnecting .