B58 Heat Management Module Replacement

Fits US B58 cars

G20 M340i (B58TU) first, then Gen 1 F30 340i, F22/F23 M240i, F32/F33/F36 440i, G30 540i, G01/G02 X3/X4 M40i, and G05 X5 40i. Gen 1 and TU part numbers differ: check the rows below. HT coolant fill volume for US cars: send us your VIN and we'll send yours.

G20 HMM torque: 10 Nm
Gen 1 HMM torque: 8 Nm

Before you start

This job swaps the heat management module, the coolant control valve on the front of the B58 block. Disconnect the negative battery before wiring work. Filling without a vacuum filler is not released for this cooling system.

What you replace

Heat management module, Gen 1 (F30, F22/F23, F32/F33/F36, early G30/G01/G02, G05 Gen 1)

11 53 7 642 854

Gen 1 oil filter housing and heat management kit

Heat management module, TU / B58C / B58D (G20 M340i and related TU cars)

11 53 8 642 559

BMW B58TU Heat Management Module Kit (INA module + Elring seals)

G20 TU connecting pipe is not sold separately on the catalog diagram.

Gasket ring 45X3.5, Gen 1 at HMM

11 53 8 658 572

Replace on install.

Profile gasket, Gen 1 at HMM

11 53 8 658 571

Replace on install.

O-ring 30X4, TU at HMM (qty 2)

11 53 9 425 963

Replace on install.

Pre-formed seals, TU at HMM

11 53 9 494 424

11 53 9 494 425

Replace on install.

HMM mounting screws, Gen 1 (qty 6)

07 12 9 905 494

Captive screws on some Gen 1 paths. Replace captive screws when your path uses them.

Intake plenum seals, throttle body seal, stiffening plate stretch bolts

New plenum seals, new throttle body seal on charge air install, and new stiffening plate stretch bolts where BMW lists them.

Out in this order

Bonnet service positionhood prop on both struts
Negative batteryde-energize first
Acoustic covers and bracestrut brace or stiffening plate
Intake silencer and tank vent valveESD strap on the vent valve plug
DME and holderprogram later if you pull it
Drain LT and HT coolantdo not reuse drained coolant
Intake plenumscrews 7 to 1 off
Heat management moduleG20: with connecting pipe; Gen 1: plenum-out; G05 X5 40i: send VIN for access
Reinstall and refillvacuum filler, strainer, bleed

Steps, torque values and part rules come from BMW's repair instructions for heat management module replacement. Part numbers come from BMW's parts catalog up to 2020. Check yours by VIN.

Drawing of the HMM and connecting pipe on the carrier with numbered dots: 1 Heat management module; 2 Connecting pipe; 3 Coolant line on the HMM; 4 HMM wiring connector — Heat management module

Connecting pipe

Coolant line on the HMM

HMM wiring connector

Generic layout: yours may differ.

Tools

Hood prop for bonnet service position

Support both gas struts before you lean into the bay.

Coolant vacuum filler with B48/B58 tank adapter Y

F30 path: 6 bar. G32 path: 7 bar. Hold 1 l to 2 l extra premixed coolant in the tank above vehicle capacity.

Inline strainer on the vacuum fill line

Use when filling with a vacuum filler.

ESD strap for tank vent valve work

Ground yourself before unplugging the vent valve.

Drain pans, PPE, torque wrench

Non-metal scrapers only on HMM sealing surfaces.

Steps

Bonnet service position
1. Gas strut
2. Ball pin on the hood
3. Hood prop on the strut
Generic layout: yours may differ.
Set the bonnet in service position with a hood prop on both gas struts before you lean into the engine bay.
Disconnect the battery

Disconnect the negative battery cable and de-energize the vehicle the way your model requires before any connector work.

Caution: do not pull on wires when disconnecting plugs.
Remove covers and brace
1. DME control unit
2. Connector lock tab
3. Connector lock tab
Generic layout: yours may differ.
Remove acoustic covers, the front strut brace or stiffening plate, the intake silencer, and the tank vent valve as needed for plenum access. Use ESD protection on tank vent valve connectors.

Caution: do not drive with the stiffening plate or strut brace left off. Mount the acoustic cover only above 20 degrees C.
Remove the DME
1. Connecting pipe
2. Heat management module
3. Slide pipe off the module
Generic layout: yours may differ.
Unlock connectors and remove the DME control unit and holder so the intake plenum and coolant lines clear.
Drain both coolants

Drain the low-temperature and high-temperature coolant circuits into a pan and dispose of the fluid locally. Do not pour used coolant back into the system.

Caution: hot coolant and hot surfaces can burn. Wear PPE and work on cooled components.
Remove intake plenum
1. Plenum screw 7 (loosen first)
2. Plenum screw 1 (loosen last)
3. Intake plenum
4. Raise plenum upward
Generic layout: yours may differ.
Loosen plenum-to-head screws in order 7 to 1, raise the plenum, and remove it while keeping coolant out of the cylinder head intake ports.

Caution: do not loosen the tie-rod screws in the marked area on the plenum.
Remove the HMM

Unlock HMM wiring and coolant lines, lift the module off the carrier, and catch the last coolant. G20: remove the module with the connecting pipe as one unit. Gen 1 F30/G32/G01: plenum-out access and captive screws. G05 X5 40i: send us your VIN and we'll send access steps for your build.

Caution: coolant line locks must click audibly on reconnect. Clean sealing surfaces without metal cutters and keep them free of oil or solvent.
Install new seals
1. New sealing ring on the HMM
2. HMM sealing face
Generic layout: yours may differ.
Install new sealing rings on the connecting pipe and HMM, coat them with coolant, and fit the module. Gen 1: new gasket ring and profile gasket. TU: new O-rings and pre-formed seals.
Torque HMM mounting
1. HMM mounting screw
2. HMM mounting screw
3. HMM mounting screw
Generic layout: yours may differ.
Tighten HMM mounting screws to the row for your path: Gen 1 F30/G32/G01 at 8 Nm, G20 heat exchange module to crankcase at 10 Nm. G05 X5 40i: send us your VIN and we'll send HMM mounting torque.
Reinstall the plenum

Fit new intake plenum seals. Tighten plenum-to-head screws at 5 Nm first pass, then 10 Nm in sequence 1 to 7. Torque plenum rear/front supports at 10 Nm. Install the charge air duct with a new throttle body seal at 8 Nm.

Caution: stiffening plate stretch bolts are single-use where listed.
Reinstall DME and covers

Reinstall the DME, tank vent valve, intake silencer, acoustic covers, and strut brace or stiffening plate with new stretch bolts where required. Torque the DME holder on the strut tower at 2.5 Nm on F30/G32 plenum paths. Tighten stiffening plate bolts to 56 Nm + 45 degrees at the front axle support and 56 Nm + 90 degrees at the adapter plate on F30/G32 paths. G20, G05 X5 40i, and other paths without a listed row: send us your VIN and we'll send stiffening plate bolt torque.
Vacuum fill and bleed

Refill both coolant circuits with a vacuum filler, the correct B48/B58 tank adapter Y, an inline strainer, and bleed the system. Switch ignition off before the fill. Do not use a watering-can fill.

Caution: HT fill volume for US cars: send us your VIN and we'll send yours.
Program the DME

Encode or program control units after the vehicle test when the DME was removed.