Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSBMW2021Z4 SDRIVE M40IREPAIR AND DIAGNOSIS (SINGLE PAGE)DRIVELINES & AXLESWHEEL HUBSFRONT AXLE -- REPAIR (G29)31 12 FRONT CONTROL ARMS31 12 001 REPLACING LEFT OR RIGHT WISHBONE (AW SPECIFICATION WITHOUT/WHEEL ALIGNMENT)INSTALLING THE WISHBONE
2021 BMW Z4 sDrive M40i
Installing the wishbone
2021 BMW Z4 sDrive M40iSECTION Installing the wishbone
NOTE:
TECHNICAL INFORMATION
Tighten the threaded connection in the normal position.
Tighten the threaded connection in the normal position.
- Position the wishbone on the front axle support.
- Replace the screw and nut (1)
.
Parts: Screw, nut
- Position the screw from the rear.
- Tighten the nut (1)
hand-tight.NOTE: The screw connection is tightened later in normal position.
- Replace nut (1)
.
Parts: Nut
- Tighten nut (1)
.NOTE: Counter-hold at the Torx socket.TIGHTENING TORQUES SPECIFICATION
Wishborne to swivel bearing M14
Replace nut.tightening torque 175 Nm
Follow-up work
- Refer to IF INSTALLED: SECURING THE RIDE HEIGHT SENSOR ONTO THE WISHBONE .
- Refer to INSTALLING FRONT LEFT OR RIGHT WHEEL .
- Refer to MEASURING THE RIDE HEIGHT OF THE FRONT AXLE AND ADJUSTING THE NORMAL POSITION .
- Refer to TIGHTENING THE SCREW CONNECTION OF THE WISHBONE ON THE FRONT SUBFRAME .
- Refer to FASTENING THE REAR SECTION OF THE FRONT WHEEL ARCH COVER .
- Refer to INSTALLING BOTTOM FRONT COVER FROM THE SIDE .
- Refer to INSTALLING FRONT UNDERBODY PROTECTION .
- Refer to PERFORM CHASSIS/WHEEL ALIGNMENT CHECK .
RENDER: 1.0x
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.