Special tools required:

• 11 0 000. See 11 0 000 ENGINE LIFTER FOR REMOVING AND INSTALLING ENGINES

Necessary preliminary tasks: 

• Disconnect battery negative lead. (Follow instructions for disconnecting and connecting battery). See 12 00 ... INSTRUCTIONS FOR DISCONNECTING AND CONNECTING BATTERY
• Lift engine hood into assembly position. See 51 00 ... SERVICE POSITION OF ENGINE HOOD/BONNET
• Remove radiator design cover.
• Remove both air cleaner housings. See 13 71 010 REMOVING AND INSTALLING/REPLACING LEFT (OR RIGHT) INTAKE FILTER HOUSING (N73)
• Remove fresh air duct on left/right. See 64 31 056 REMOVING AND INSTALLING/REPLACING LEFT OR RIGHT FRESH-AIR DUCT (AUTOMATIC A/C HIGH)
• Remove bulkhead, equipment compartment, center. See 51 71 085 REMOVING AND INSTALLING CENTER OF ASSEMBLY COMPARTMENT BULKHEAD
• Release engine wiring harness from electronics box. See 12 51 001 REPLACING WIRING HARNESS SECTION FOR ENGINE (N73)
• Drain coolant. See 17 00 005 DRAINING AND ADDING COOLANT (N73)
• Remove coolant expansion tank. See 17 11 100 REMOVING AND INSTALLING/REPLACING COOLANT EXPANSION TANK (N73)
• Remove radiator. See 17 11 000 REMOVING AND INSTALLING RADIATOR (N73)
• Remove A/C compressor drive belt. See 11 28 050 REPLACING A/C COMPRESSOR DRIVE BELT (N62)
• Remove alternator drive belt. See 11 28 010 Replacing Alternator Drive Belt (N73) 
• Release fuel lines, feed and return lines. See 13 53 175 REMOVING AND INSTALLING/REPLACING ALL PRESSURE LINES (N73)
• Remove front/middle underbody protection.
• Remove reinforcement plate. See 31 10 010 REMOVING AND INSTALLING/REPLACING REINFORCEMENT PLATE
• Remove exhaust. See 18 00 020 REMOVING AND INSTALLING COMPLETE EXHAUST SYSTEM (N73)
• Remove left exhaust manifold. See 18 40 010 REMOVING AND INSTALLING/REPLACING LEFT EXHAUST MANIFOLD (N73)
• Remove right exhaust manifold. See 18 40 020 REMOVING AND INSTALLING/REPLACING RIGHT EXHAUST MANIFOLD (N73)
• Remove transmission. See 24 00 023 REMOVING AND INSTALLING AUTOMATIC TRANSMISSION (6HP26Z/6HP32Z)

Installation: 

Tightening torque 31 10 1AZ. See 31 10 FRONT AXLE SUSPENSION

Do not detach oil lines from automatic transmission to heat exchanger.

Secure starter motor (1) with transmission screw (2) against falling out.

Fig 1: Identifying Starter Motor With Transmission Screw

Courtesy of BMW OF NORTH AMERICA, INC.

Release A/C compressor (1).

Release power steering pump (2).

Fig 2: Identifying A/C Compressor And Power Steering Pump With Cable Ties

Courtesy of BMW OF NORTH AMERICA, INC.

Detach plug connections (1) on tank vent valve cyl. 1-6 and 7-12.

Disconnect tank vent line (2) and lay to one side.

Disconnect vacuum line (3) and lay to one side.

Fig 3: Identifying Plug Connections And Tank Vent Line With Vacuum Line

Courtesy of BMW OF NORTH AMERICA, INC.

Unlock and detach water hoses (1).

Unlock heater hose (2) and detach in direction of arrow.

Installation: 

Plug connections of water hoses are correctly fitted when they snap into place with a clearly audible click. 

Fig 4: Locating Heater Hose

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Unlock water hose (1) on auxiliary water pump and detach in direction of arrow.

Fig 5: Detaching Water Hose

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Unlock hose (1) and detach from secondary air pump.

Secure automatic transmission heat exchanger (2) with cable tie (3) against falling down.

Fig 6: Identifying Automatic Transmission Heat Exchanger With Cable Tie

Courtesy of BMW OF NORTH AMERICA, INC.

Place engine oil cooler (1) on suction bridge.

Secure engine wiring harness (2) against falling down with cable tie (3) on suction bridge.

Mount special tool 11 0 000 on engine. See 11 0 000 ENGINE LIFTER FOR REMOVING AND INSTALLING ENGINES .

Fig 7: Identifying Special Tool (11 0 000)

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Remove screw (1) on left and right engine brackets.

Unfasten ground strap (2).

Remove engine.

Fig 8: Identifying Screw On Left And Right Engine Brackets

Courtesy of BMW OF NORTH AMERICA, INC.