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.
READ NEXT:
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
SEE MORE:
Child restraint systems
with tether strap
Safety information
Warning
If the upper retaining strap is incorrectly used
for the child restraint system, the protective effect
is reduced. There is a risk of injury. Make
sure that the upper retaining strap does not run
over sharp edges and is not twisted as it
passes the upper anchor.
Warning
If
Removing And Installing/Replacing Wind Deflector
Necessary preliminary tasks:
Open slide/tilt sunroof
NOTE: Shown removed here for purposes of clarity.
Pull plastic strip (1) on net of wind deflector out of retainers (2).
IMPORTANT: Do not pull on the net so as to avoid tearing the net.
Installation:
If necessary, reinstall retainers in frame.
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