BMW X5 Owners & Service Manuals

BMW X5: Air Management N52KP and N51

As far as the air management system on the N52KP and N51 engines is concerned, the previous intake manifold system on the N52 is carried over. Depending upon application, the engines will use the 3-stage DISA or the single stage (No DISA) intake manifold.

For more information on the DISA system refer to the previous training material in the training course "ST501 - New Engine Technology".

Engine Service Information
Fig. 33: Identifying Intake Manifold System

Throttle Valve

All variants of the new NG6 engines receive the new EGAS 08 throttle by Siemens/VDO. The new throttle uses a plastic throttle valve and magneto-resistive feedback to the ECM.

The previous system used a potentiometer, whereas the new throttle uses a "contactless" system featuring magneto-resistive technology which is familiar from the eccentric shaft sensor on Valvetronic systems.

Engine Service Information
Fig. 34: Identifying Throttle Valve

The magneto-resistive sensors are integrated into the housing cover. The sensors are also non-wearing.

For plausibility, the one sensor outputs the analog signal in the range from 0.3 to 4.6 V and the other sensor inverts it again from 4.6 to 0.3 V.

Consequently, the contact force is 10 times greater than that of a conventional plug connector.

NOTE: It is possible to twist the connector before plugging it in. This can cause damage to the harness and connector.

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