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
SEE MORE:
Removing And Installing/Replacing Left Intermediate Levers (N62
From 9/03 And N62TU)
Special tools required:
11 9 470
11 9 472
11 9 473
11 9 474
11 9 475
11 9 480
11 9 490
(cylinder bank 5 to 8)
Removal of intermediate levers is described separately from installation.
Necessary preliminary tasks:
Remove servomotor for left eccentric shaft.
Remove ignition coils on cylin
Removing And Installing Or Replacing Muffler/Silencer
WARNING: Scalding hazard!
Work on independent heating may only be carried out when it has cooled
down.
Necessary preliminary tasks:
Remove left underbody panelling.
Slacken clamp (1).
Release screws (2) and remove muffler (3).
Tightening torque.
Fig. 45: Identifying Muffler/Silencer And Slack
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