BMW X5: Emissions Management
BMW X5 (G05) 2019-2025 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:
Replacing Backrest Cover For Rear Seat (Through-Loading System) On
Right
Special tools required:
52 0 050.
Necessary preliminary tasks:
Remove right backrest cover.
Remove head restraint guides.
Remove backrest actuator trim and lock trim.
Lever out welt in marked area.
Fig. 181: Identifying Welt Marked Area
Detaching cover and padding:
Release all retainers
Removing And Installing Complete Left Or Right Spring Strut Shock
Absorber
WARNING: Danger to life!
Mount securing fixture for vehicle on lifting platform to prevent the
vehicle from slipping off or tilting down.
Necessary preliminary tasks:
Remove side assembly compartment partition wall.
Remove spring strut holder.
IMPORTANT: Risk of damage
Secure spring strut again
© 2019-2025 Copyright www.bmwx5info.com
