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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Overview Of Airbag Modules, Airbag Control Unit, Belt Tensioners
Fig. 17: Identifying Airbag Modules, Airbag Control Unit, Belt Tensioners
Components Location
Safety battery terminal (*)
Side airbag, front seat, left/right (*)
Belt tensioner, front left/right (*)
Airbag unit, passenger side (*)
Airbag module, driver's side (*)
Head airbag, left/right (*)
Replacing Shaft Seal For Left Output Shaft
Special tools required:
31 4 160
Necessary preliminary tasks:
Remove left output shaft.
Lever shaft seal (1) out of front differential with a screwdriver (2).
Fig. 122: Identifying Shaft Seal And Screwdriver
Installing shaft seal:
NOTE: The installation protective ring (1) serves to protect t
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