BMW X5: Emissions Management
BMW X5 (G05) 2019-2026 Service & Repair Manual / Engine Service Information / Emissions Management
The N54 and N52KP meet ULEV II requirements for 2007. There are not many changes to the emission systems on these engines. The N54 engine has 2 underbody catalysts in addition to the "near engine" catalysts already in use from the N52.
The N51 engine, however, is a SULEV II compliant engine which meets the 2007 requirements. In addition to the 5 existing SULEV states of California, New York, Maine, Massachusetts, and Vermont - four states have been added for 2007. These states include, Connecticut, Rhode Island, Oregon and Washington State.
The N51 emissions measures include:
- Secondary Air System with mini-HFM
- Radiator with "Prem-air" coating
- Lower compression ratio (10:1) via modified combustion chamber and pistons
- Underbody catalyst in addition to "near engine" catalyst
- Activated carbon air filter in air filter housing
- Steel fuel lines with threaded fittings and sealed fuel tank
- Crankcase ventilation system integrated into cylinder head cover
- Purge system piping made from optimized plastic
NOTE: The SULEV II information above is only preliminary and is accurate as of 8/06.
Additional information will be released as it becomes available.
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Performance Controls
Cooling System
The cooling system of the N54 engine consists of a radiator circuit and an
isolated oil cooling circuit. The fact
that there is an isolated oil-cooling circuit ensures that heat is not
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Removing And Installing Mechanism For Rear Glass Lid
Necessary preliminary tasks:
Remove complete glass slide/tilt sunroof.
Remove glass slide/tilt sunroof lid at rear.
Remove rear drip molding.
Remove drive units with gearing.
Overview of glass lid mechanism:
Fig. 15: Identifying Glass Lid Mechanism Components
Floating roofliner mechanism
Removing And Installing/Replacing Centering Mount For Propeller
Shaft
Special tools required:
00 5 500 00 5 500 HANDLE FOR DRIFTS
11 1 310 11 1 310 DRIFT
11 2 030 11 2 030 DRIFT
Necessary preliminary tasks:
Remove propeller shaft.
Fill centering bore (1) completely with viscous grease.
Drive special tool 11 1 310 with a plastic hammer
into centering bore.
T
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