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.
2021 BMW X7 xDrive50iFACTORY OEM SERVICE PROCEDURE
Variable Valve Timing Control System - Repair (G07) (2 Of 4)
- 11 36 Variable Valve Timing Control System (VANOS)
- 11 36 129 Removing and installing/replacing left VANOS central valve exhaust (X7 xDrive50i xDrive 2019-2020)
- Remove the sealing cap on the cylinder head of the cylinder bank 2
- Moving the crankshaft to the installation position to adjust the timings
- Check the VANOS adjuster of cylinder bank 2
- Relaxing chain tensioner on bank 2 for checking or setting timing
- Removing hydraulic chain tensioner of cylinder bank 2
- Preloading the timing chain of cylinder bank 2
- Fixing the engine in the installation position on cylinder 1 (set valve timings)
- Removing the left exhaust VANOS central valve
- Installing the VANOS exhaust central valve on the left
- Removing special tool to pretension timing chain on cylinder bank 2
- Installing the hydraulic chain tensioner of cylinder bank 2
- Installing the sealing cap on the cylinder head of cylinder bank 2
- 11 36 130 Removing and installing/replacing both VANOS central valves, left (X7 xDrive50i xDrive 2019-2020)
- Remove the sealing cap on the cylinder head of the cylinder bank 2
- Moving the crankshaft to the installation position to adjust the timings
- Check the VANOS adjuster of cylinder bank 2
- Relaxing chain tensioner on bank 2 for checking or setting timing
- Removing hydraulic chain tensioner of cylinder bank 2
- Preloading the timing chain of cylinder bank 2
- Fixing the engine in the installation position on cylinder 1 (set valve timings)
- Removing both left VANOS central valves
- Installing both VANOS central valves at left
- Removing special tool to pretension timing chain on cylinder bank 2
- Installing the hydraulic chain tensioner of cylinder bank 2
- Installing the sealing cap on the cylinder head of cylinder bank 2
- 11 36 730 Removing and installing/replacing VANOS solenoid actuator, left (X7 xDrive50i xDrive 2019-2020)
- 11 36 731 Removing and installing/replacing the VANOS solenoid actuator, left (X7 xDrive50i xDrive 2019-2020)
- 11 36 733 Removing and installing/replacing VANOS solenoid actuator, right (X7 xDrive50i xDrive 2019-2020)
- 11 36 734 Removing and installing/replacing VANOS solenoid actuator, right (X7 xDrive50i xDrive 2019-2020)
- 11 36 047 Removing and installing both adjusters, left (X7 M50i 2020-2022)
- 11 36 048 Removing and installing/replacing both adjusters, right (X7 M50i 2020-2022)
- Moving the crankshaft into the installation position of cylinder bank 1
- Checking the VANOS adjuster of cylinder bank 1
- Relieving the chain tensioner at cylinder bank 1 for checking or setting the valve timings
- Removing hydraulic chain tensioner of cylinder bank 1
- Preloading the timing chain of cylinder bank 1
- Fixing the engine in the installation position on cylinder 1 (set valve timings)
- Removing, installing, replacing the VANOS adjusters on the right
- Removing the special tool to pretension the timing chain at cylinder bank 1
- Installing the hydraulic chain tensioner of cylinder bank 1
- 11 36 112 Removing and installing/replacing the intake adjuster, left (X7 M50i 2020-2022)
- Remove the sealing cap on the cylinder head of the cylinder bank 2
- Moving the crankshaft to the installation position to adjust the timings
- Check the VANOS adjuster of cylinder bank 2
- Relaxing chain tensioner on bank 2 for checking or setting timing
- Removing hydraulic chain tensioner of cylinder bank 2
- Preloading the timing chain of cylinder bank 2
- Fixing the engine in the installation position on cylinder 1 (set valve timings)
- Replacing the left intake VANOS adjuster
- Removing special tool to pretension timing chain on cylinder bank 2
- Installing the hydraulic chain tensioner of cylinder bank 2
- Installing the sealing cap on the cylinder head of cylinder bank 2
- 11 36 114 Removing and installing/replacing left exhaust camshaft adjuster (X7 M50i 2020-2022)
- Remove the sealing cap on the cylinder head of the cylinder bank 2
- Moving the crankshaft to the installation position to adjust the timings
- Check the VANOS adjuster of cylinder bank 2
- Relaxing chain tensioner on bank 2 for checking or setting timing
- Removing hydraulic chain tensioner of cylinder bank 2
- Preloading the timing chain of cylinder bank 2
- Fixing the engine in the installation position on cylinder 1 (set valve timings)
- Replacing the exhaust camshaft adjuster on the left
- Removing special tool to pretension timing chain on cylinder bank 2
- Installing the hydraulic chain tensioner of cylinder bank 2
- Installing the sealing cap on the cylinder head of cylinder bank 2
- 11 36 129 Removing and installing/replacing left VANOS central valve exhaust (X7 xDrive50i xDrive 2019-2020)
Factory Service Tools
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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.
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