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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Stereo Radio, Amplifier
REMOVING AND INSTALLING/REPLACING LEFT OR RIGHT CENTRAL BASS
SPEAKER
Necessary preliminary tasks:
Remove front seat
Lay floor carpet in working area to one side
Release screws (1) and remove trim (2).
Fig. 5: Identifying Trim With Screws
Disconnect plug connection (1).
Release screws (2) and fe
Checking Thickness Of Brake Pad
Special tools required:
34 1 260.
NOTE: The thickness of the outer brake pads can be determined without
removing the
wheels.
If necessary, move car until opening for brake pad wear indicator (brake pad)
can be seen through rim styling.
Insert special tool 34 1 260 through rim into opening for b
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