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)ACCESSORIES & EQUIPMENTCRUISE CONTROL SYSTEMSDISTANCE SYSTEMS, CRUISE CONTROL -- REPAIR (G29)
2021 BMW Z4 sDrive M40i
Distance Systems, Cruise Control -- Repair (G29)
2021 BMW Z4 sDrive M40iSECTION Distance Systems, Cruise Control -- Repair (G29)
- 66 12 Key Fob
- 66 20 Parking Assistance System
- 66 20 510 Removing and installing/replacing control unit (Park Distance Control)
- 66 20 515 Remove and attach/replace left front ultrasonic sensor (Park Distance Control)
- 66 20 516 Remove and attach/replace right front ultrasonic sensor (Park Distance Control)
- 66 20 517 Remove and attach/replace left front center ultrasonic sensor (Park Distance Control)
- 66 20 519 Remove and attach/replace right front center ultrasonic sensor (Park Distance Control)
- 66 20 534 Removing and installing/replacing ultrasonic sensor, rear left (Park Distance Control)
- 66 20 535 Dismantle and install/replace right rear ultrasonic sensor (Park Distance Control)
- 66 20 536 Removing and installing/replacing ultrasonic sensor, rear center left (Park Distance Control)
- 66 20 537 Removing and installing/replacing rear right ultrasonic sensor, center (Park Distance Control)
- 66 31 Adaptive Cruise Control
- 66 32 Sensors For Lane Change Warning
- 66 33 Parking Assistant System (PMA)
- 66 51 Camera-Based Driver-Assistance Systems (CADAS)
- 66 53 Rear View Camera
RENDER: 1.0x
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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.