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.
2018 BMW X5 xDrive50iFACTORY OEM SERVICE PROCEDURE
Engine - Repair (3 Of 4)
- Camshafts
- 11 31 505 Adjusting timing of camshaft(s) (PHEV)
- 11 31 573 Adjusting camshaft timing on left side (N63)
- 11 31 574 Adjusting camshaft timing on right side (N63)
- 11 31 505 Adjusting timing of camshaft(s) (N55)
- 11 31 505 Adjusting timing of camshafts (N57)
- 11 31 544 Checking the timing chain for elongation and replacing the timing chain above (N57)
- 11 31 005 Checking camshaft timing (N55)
- 11 31 070 Checking camshaft timing on left side (N63)
- 11 31 071 Checking camshaft timing on right side (N63)
- 11 31 005 Checking the camshaft timing (N57)
- 11 31 005 Checking camshaft timing (PHEV)
- 11 31 540 Checking timing chain for elongation and replacing chain tensioner (N57)
- 11 31... Checking/reworking intake camshaft (N20, N26)
- 11 31... Determining intake camshaft variant (N20, N26)
- 11 31 090 Installing and removing/replacing chain tensioner piston (N55)
- 11 31 090 Removing and installing/replacing chain tensioner piston (PHEV)
- 11 31 090 Removing and installing/replacing chain tensioner piston (N57)
- 11 31 028 Removing and installing/replacing exhaust camshaft (N55)
- 11 31 028 Removing and installing/replacing exhaust camshaft (PHEV)
- 11 31 025 Removing and installing or replacing intake camshaft (PHEV)
- 11 31 038 Removing and installing/replacing right exhaust camshaft (N63)
- 11 31 025 Removing and installing/replacing intake camshaft (N55)
- 11 31 036 Removing and installing/replacing left exhaust camshaft (N63)
- 11 31 032 Removing and installing/replacing left intake camshaft (N63)
- 11 31 034 Removing and installing/replacing right intake camshaft (N63)
- 11 31 094 Removing hydraulic chain tensioner for timing chains on left side (N63)
- 11 31 095 Removing hydraulic chain tensioner for timing chains on right side (N63)
- 11 31 051 Replacing timing chain (PHEV)
- 11 31 052 Replacing both timing chains (N57)
- 11 31 052 Replacing both timing chains (N63)
- 11 31 028 Replacing exhaust camshaft (N57)
- 11 31 025 Replacing intake camshaft (N57)
- 11 31 051 Replacing timing chain (N55) from March 2012
- 11 31... Service solution - replacing intake camshaft (N20, N26)
- Rocker Arms
- 11 33 054 Removing and installing/replacing all rocker arms, right (N63)
- 11 33 062 Removing and installing/replacing all hydraulic valve clearance compensating elements (HVC) (N63)
- 11 33 050 Removing and installing/replacing all rocker arms (N55)
- 11 33 062 Removing and installing/replacing all rocker arms (N57)
- 11 33 050 Removing and installing/replacing all rocker arms (PHEV)
- 11 33 052 Removing and installing/replacing all rocker arms on left side (N63)
- 11 33 062 Removing and refitting/replacing all hydraulic valve clearance compensating elements (N57)
- INTAKING And Exhaust Valves, Valve Stem Seals
- 11 34 552 Removing and installing/replacing all valves (N55)
- 11 34 552 Removing and installing/replacing all valves (N63)
- 11 34 552 Removing and installing/replacing all valves (PHEV)
- 11 34 715 Replacing all valve springs (N55)
- 11 34 715 Replacing all valve springs (N57)
- 11 34 715 Replacing all valve springs (N63)
- 11 34 715 Replacing all valve springs (PHEV)
- 11 34 560 Replacing all valve stem seals (N55)
- 11 34 560 Replacing all valve stem seals (N57)
- 11 34 560 Replacing all valve stem seals (N63)
- 11 34 560 Replacing all valve stem seals (PHEV)
- Variable Valve Timing Control System (VANOS)
- 11 36 046 Removing and installing/replacing intake and exhaust camshaft adjuster (PHEV)
- 11 36 046 Removing and installing or replacing intake and exhaust camshaft adjusters (N55)
- 11 36 720 Removing and installing/replacing both solenoid valves on right side (N63)
- 11 36 047 Removing and installing/replacing intake and exhaust adjustment units on left side (N63)
- 11 36 655 Removing and installing/replacing both actuators (PHEV)
- 11 36 655 Removing and installing/replacing both solenoid valves (N55)
- 11 36 715 Removing and installing/replacing both solenoid valves on left side (N63)
- 11 36 048 Removing and installing/replacing intake and exhaust adjustment units on right side (N63)
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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